FIELD OF THE INVENTION
[0001] The invention relates in part to molecules having certain biological activities that
include, but are not limited to, inhibiting cell proliferation, and modulating certain
protein kinase activities. Molecules of the invention modulate, e.g., Protein Kinase
CK2 (called CK2 herein) and are useful to treat conditions associated directly or
indirectly with CK2 activities, e.g., cancers, inflammatory conditions, infectious
disorders, pain, immunological disorders, and neurodegenerative disorders (such as
Alzheimer's disease and Parkinson's disease). The invention also relates in part to
the use of such compounds, and pharmaceutical compositions containing these compounds.
BACKGROUND
[0002] WO2004/076458 describes pyrazolo[1,5-a]pyrimidines having protein kinase inhibitory activity. These
compounds are useful in treating disorders where a kinase is implicated, such as inflammatory
disease and cancer.
[0003] WO2004/028535 describes a series of thiazolidines that are modulators of the Pin1 protein and Pin1-related
proteins.
[0004] Protein kinase CK2 (formerly called Casein kinase II, referred to herein as "CK2")
is a ubiquitous and highly conserved protein serine/threonine kinase. The holoenzyme
is typically found in tetrameric complexes consisting of two catalytic (alpha and/or
alpha') subunits and two regulatory (beta) subunits. CK2 has a number of physiological
targets and participates in a complex series of cellular functions including the maintenance
of cell viability. The level of CK2 in normal cells is tightly regulated, and it has
long been considered to play a role in cell growth and proliferation. Inhibitors of
CK2 that are useful for treating certain types of cancers are described in
PCT/US2007/077464,
PCT/US2008/074820,
PCT/US2009/35609.
[0005] The prevalence and importance of CK2, as well as an evolutionary analysis of its
sequence, suggest it is an ancient enzyme on the evolutionary scale; its longevity
may explain why it has become important in so many biochemical processes, and why
CK2 from hosts have even been co-opted by infectious pathogens (
e.
g., viruses, protozoa) as an integral part of their survival and life cycle biochemical
systems. These same characteristics explain why inhibitors of CK2 are believed to
be useful in a variety of medical treatments as discussed herein. Because CK2 is central
to many biological processes, as summarized by
Guerra & Issinger, Curr. Med. Chem., 2008, 15:1870-1886, inhibitors of CK2, including the compounds described herein, should be useful in
the treatment of a variety of diseases and disorders.
[0006] Cancerous cells show an elevation of CK2, and recent evidence suggests that CK2 exerts
potent suppression of apoptosis in cells by protecting regulatory proteins from caspase-mediated
degradation. The anti-apoptotic function of CK2 may contribute to its ability to participate
in transformation and tumorigenesis. In particular, CK2 has been shown to be associated
with acute and chronic myelogenous leukemia, lymphoma and multiple myeloma. In addition,
enhanced CK2 activity has been observed in solid tumors of the colon, rectum and breast,
squamous cell carcinomas of the lung and of the head and neck (SCCHN), adenocarcinomas
of the lung, colon, rectum, kidney, breast, and prostate. Inhibition of CK2 by a small
molecule is reported to induce apoptosis of pancreatic cancer cells, and hepatocellular
carcinoma cells (HegG2, Hep3, HeLa cancer cell lines); and CK2 inhibitors dramatically
sensitized RMS (Rhabdomyosarcoma) tumors toward apoptosis induced by TRAIL. Thus an
inhibitor of CK2 alone, or in combination with TRAIL or a ligand for the TRAIL receptor,
would be useful to treat RMS, the most common soft-tissue sarcoma in children. In
addition, elevated CK2 has been found to be highly correlated with aggressiveness
ofneoplasias, and treatment with a CK2 inhibitor of the invention should thus reduce
tendency of benign lesions to advance into malignant ones, or for malignant ones to
metastasize.
[0007] Unlike other kinases and signaling pathways, where mutations are often associated
with structural changes that cause loss of regulatory control, increased CK2 activity
level appears to be generally caused by upregulation or overexpression of the active
protein rather than by changes that affect activation levels. Guerra and Issinger
postulate this may be due to regulation by aggregation, since activity levels do not
correlate well with mRNA levels. Excessive activity of CK2 has been shown in many
cancers, including SCCHN tumors, lung tumors, breast tumors, and others.
Id.
[0008] Elevated CK2 activity in colorectal carcinomas was shown to correlate with increased
malignancy. Aberrant expression and activity of CK2 have been reported to promote
increase nuclear levels of NF-kappaB in breast cancer cells. CK2 activity is markedly
increased in patients with AML and CIVIL during blast crisis, indicating that an inhibitor
of CK2 should be particularly effective in these conditions. Multiple myeloma cell
survival has been shown to rely on high activity of CK2, and inhibitors of CK2 were
cytotoxic to MM cells.
[0009] The literature provides clear evidence that inhibition of CK2 correlates with efficacy
against tumor cells. For example, a CK2 inhibitor inhibited growth of murine p190
lymphoma cells. Its interaction with Bcr/Abl has been reported to play an important
role in proliferation of Bcr/Abl expressing cells, indicating inhibitors of CK2 may
be useful in treatment of Bcr/Abl-positive leukemias. Inhibitors of CK2 have been
shown to inhibit progression of skin papillomas, prostate and breast cancer xenografts
in mice, and to prolong survival of transgenic mice that express prostate-promoters.
Id.
[0010] The role of CK2 in various non-cancer disease processes has been recently reviewed.
See
Guerra & Issinger, Curr. Med. Chem., 2008, 15:1870-1886. Increasing evidence indicates that CK2 is involved in critical diseases of the central
nervous system, including, for example, Alzheimer's disease, Parkinson's disease,
and rare neurodegenerative disorders such as Guam-Parkinson dementia, chromosome 18
deletion syndrome, progressive supranuclear palsy, Kuf's disease, or Pick's disease.
It is suggested that selective CK2-mediated phosphorylation of tau proteins may be
involved in progressive neurodegeneration of Alzheimer's disease. In addition, recent
studies suggest that CK2 plays a role in memory impairment and brain ischemia, the
latter effect apparently being mediated by CK2's regulatory effect on the PI3K survival
pathways.
[0011] CK2 has also been shown to be involved in the modulation of inflammatory disorders,
for example, acute or chronic inflammatory pain, glomerulonephritis, and autoimmune
diseases, including,
e.
g., multiple sclerosis (MS), systemic lupus erythematosus, rheumatoid arthritis, and
juvenile arthritis. It positively regulates the function of the serotonin 5-HT3 receptor
channel, activates heme oxygenase type 2, and enhances the activity of neuronal nitric
oxide synthase. A selective CK2 inhibitor was reported to strongly reduce pain response
of mice when administered to spinal cord tissue prior to pain testing. It phosphorylates
secretory type IIA phospholipase A2 from synovial fluid of RA patients, and modulates
secretion of DEK (a nuclear DNA-binding protein), which is a proinflammatory molecule
found in synovial fluid of patients with juvenile arthritis. Thus, inhibition of CK2
is expected to control progression of inflammatory pathologies such as those described
here, and the inhibitors disclosed herein have been shown to effectively treat pain
in animal models.
[0012] Protein kinase CK2 has also been shown to play a role in disorders of the vascular
system, such as,
e.g., atherosclerosis, laminar shear stress, and hypoxia. CK2 has also been shown to play
a role in disorders of skeletal muscle and bone tissue, such as cardiomyocyte hypertrophy,
impaired insulin signaling and bone tissue mineralization. In one study, inhibitors
of CK2 were effective at slowing angiogenesis induced by growth factor in cultured
cells. Moreover, in a retinopathy model, a CK2 inhibitor combined with octreotide
(a somatostatin analog) reduced neovascular tufts; thus, the CK2 inhibitors described
herein would be effective in combination with a somatoslatin analog to treat retinopathy.
[0013] CK2 has also been shown to phosphorylate GSK, troponin and myosin light chain; thus,
CK2 is important in skeletal muscle and bone tissue physiology, and is linked to diseases
affecting muscle tissue.
[0014] Evidence suggests that CK2 is also involved in the development and life cycle regulation
of protozoal parasites, such as, for example,
Theileria parva, Trypanosoma cruzi,
Leishmania donovani, Herpetomonas muscarum muscarum,
Plasmodium falciparum,
Trypanosoma bucei, Toxoplasma gondii and
Schistosoma mansoni. Numerous studies have confirmed the role of CK2 in regulation of cellular mobility
of protozoan parasites, essential to invasion of host cells. Activation of CK2 or
excessive activity of CK2 has been shown to occur in hosts infected with
Leishmania donovani, Herpetomonas muscarum muscarum, Plasmodium falciparum, Trypanosoma
brucei, Toxoplasma gondii and
Schistosoma mansoni. Indeed, inhibition of CK2 has been shown to block infection by
T.
cruzi.
[0015] CK2 has also been shown to interact with and/or phosphorylate viral proteins associated
with human immunodeficiency virus type 1 (HIV-1), human papilloma virus, and herpes
simplex virus, in addition to other virus types (
e.
g. human cytomegalovirus, hepatitis C and B viruses, Borna disease virus, adenovirus,
coxsackievirus, coronavirus, influenza, and varicella zoster virus). CK2 phosphorylates
and activates HIV-1 reverse transcriptase and proteases
in vitro and
in vivo, and promotes pathogenicity of simian-human immunodeficiency virus (SHIV), a model
for HIV. Inhibitors of CK2 are thus able to reduce pathogenic effects of a model of
HIV infection. CK2 also phosphorylates numerous proteins in herpes simplex virus and
numerous other viruses, and some evidence suggests viruses have adopted CK2 as a phosphorylating
enzyme for their essential life cycle proteins. Inhibition of CK2 is thus expected
to deter infection and progression of viral infections, which rely upon the host's
CK2 for their own life cycles.
[0016] CK2 is unusual in the diversity of biological processes that it affects, and it differs
from most kinases in other ways as well: it is constitutively active, it can use ATP
or GTP, and it is elevated in most tumors and rapidly proliferating tissues. In addition,
while many kinase inhibitors affect multiple kinases, increasing the likelihood of
off-target effects or variability between individual subjects, CK2's unique structural
features enable discovery of highly CK2-specific inhibitors. For all of these reasons,
CK2 is a particularly interesting target for drug development, and the invention provides
highly effective inhibitors of CK2 that are useful in treating a variety of different
diseases and disorders mediated by or associated with excessive, aberrant or undesired
levels of CK2 activity.
[0017] Compounds of Formula I have been found to be active on CK2 as well as on one or more
Pim proteins. It has now been found that compounds of Formula (II) and (II') are typically
more active on CK2, and also have less activity on Pim kinases. Without being bound
by the theory, it is believed that their physiological activities derive from their
activity on CK2.
[0018] The current invention provides novel compounds of Formula (II) and (II'), as well
as Formulae IIa, IIa', II-Th and II-Th', and pharmaceutical compositions containing
these compounds. The novel compounds of Formula II, which are related to the compounds
of Formula I, show surprisingly greater activity on CK2 and reduced Pim activity,
and thus are advantageously used to treat conditions sensitive to CK2 inhibition such
as those described herein. Compounds of Formula II are therefore useful to treat conditions
mediated by or associated with excessive activity of CK2, with reduced likelihood
of off-target effects caused by inhibition of other kinases.
DISCLOSURE OF THE INVENTION
[0019] The present invention in part provides chemical compounds having certain biological
activities that include, but are not limited to, inhibiting cell proliferation, inhibiting
angiogenesis, and modulating protein kinase activities. These molecules modulate protein
kinase CK2 (CK2) and/or PIM activity, and are typically more selective for CK2 activity
over other kinases than similar compounds that lack the amine group shown in Formula
(II) or (II'). These compounds affect biological functions that include but are not
limited to, inhibiting gamma phosphate transfer from ATP to a protein or peptide substrate,
inhibiting angiogenesis, inhibiting cell proliferation and inducing cell apoptosis,
for example. Also provided are compositions comprising these molecules in combination
with other materials, including other therapeutic agents, and methods for using such
compositions.
Prior art compounds of the general formula (I) have been shown to inhibit Pim and
CK2 (
PCT/US2010/035657):
wherein the bicyclic ring system containing Z1-Z4 is aromatic;
one of Z1 and Z2 is C, the other of Z1 and Z2 is N;
Z3 and Z4 are independently CR5 or N,
where R5 can be H or R1;
R1 is H, halo, CN, optionally substituted C1-C4 alkyl, optionally substituted C2-C4
alkenyl, optionally substituted C2-C4 alkynyl, optionally substituted C1-C4 alkoxy,
or -NR7R8,
where R7 and R8 are each independently selected from H, optionally substituted C1-C10 alkyl, optionally
substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl,
and optionally substituted heteroarylalkyl,
or R7 and R8 taken together with the N of -NR7R8 form an optionally substituted 5-8 membered ring that optionally contains an additional
heteroatom selected from N, O and S as a ring member;
R2 is H, halo, CN, or an optionally substituted group selected from C1-C4 alkyl, C2-C4
alkenyl, and C2-C4 alkynyl;
R3 and R4 are independently selected from H and optionally substituted C1-C10 alkyl;
X is NR6, O, or S, where R6 is H or an optionally substituted group selected from C1-C4 alkyl, C2-C4 alkenyl,
and C2-C4 alkynyl;
Y is O or S;
W is optionally substituted aryl, optionally substituted heteroaryl, or -NR9R10,-OR9, S(O)nR9, optionally substituted carbon-linked heterocyclyl, optionally substituted C3-C8
cycloalkyl, or CR9R10R11,
wherein n is 0, 1 or 2, and
R9 and R10 are each independently selected from H, optionally substituted C1-C10 alkyl, optionally
substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl,
and optionally substituted heteroarylalkyl,
or R9 and R10 taken together with the N of -NR9R10 form an optionally substituted 5-8 membered ring that optionally contains an additional
heteroatom selected from N, O and S as a ring member, and
R11 is selected from H, optionally substituted C1-C10 alkyl, optionally substituted aryl,
optionally substituted arylalkyl, optionally substituted heteroaryl, and optionally
substituted heteroarylalkyl.
[0020] The compounds of Formula I inhibit Pim and CK2, and often inhibit other kinases as
well. For use as pharmaceuticals, it can be advantageous to select compounds that
inhibit one primary target enzyme or receptor with minimal affect on other pathways
or targets, because off-target biochemical effects can cause unpredictable side effects.
It has now been found that novel compounds of Formula (II) and (II'), which are related
to the compounds of Formula I, retain high levels of CK2 activity, and indeed are
often more potent on CK2 than other compounds like Formula I, yet they are typically
selective for CK2 over Pim kinases. In addition, their selectivity for CK2 over other
kinases in a broad array of kinases is also improved over that of the compounds of
Formula I generally. Therefore, compounds of Formula (II) or (II') represent a particularly
useful class of compounds for the methods of treatment described herein, because they
are selective for CK2 and inhibit fewer other kinases, resulting in a reduced risk
of side-effects. The invention accordingly provides a compound which is a heterocycle
of Formula (II), (II'), (IIa) or (IIa'):

or a pharmaceutically acceptable salt and/or solvate thereof;
wherein, in formula (II), (II'), (IIa) and (IIa')
Z3 represents N or CR5, or CH;
Z4 represents CH, N or CR5
each R5 is independently selected from halo, -CN, -R, -OR, -S(O)nR, -COOR, -CONR2, and -NR2,
wherein each R is independently selected from H and optionally substituted C1-C4 alkyl,
or alternatively, the two R groups, taken together with the nitrogen atom to which
they are attached, form an optionally substituted 5 or 6 membered heterocyclic ring
that optionally contains one or more additional heteroatom selected from N, O and
S as a ring member;
each n is independently is 0,1 or 2; and
each m is independently 1,2,3 or 4; in formulae (II) and (II'):
R2, R3 and R4 are each independently selected from H and optionally substituted C1-C10 alkyl;
X represents NR2, O, or S;
Y is O or S;
where R10 is selected from H, CN, optionally substituted C1-C4 alkyl, optionally substituted
C2-C4 alkenyl, optionally substituted C2-C4 alkynyl, optionally substituted C1-C4
alkoxy, and -NR7R8,
ZisO;
L is -NR7-, a bond, -CR7=CR8-, -C≡C-, -O-, -S(O)n-, -(CR7R8)m-, -(CR7R8)m-NR7-,-(CR7R8)m-O-, or -(CR7R8)m-S(O)n-;
W is optionally substituted aryl, optionally substituted C1-C10 alkyl, optionally
substituted C1-C10 heteroalkyl, optionally substituted heteroaryl, -NR7R8, -OR7, -S(O)nR7,-CONR7R8, optionally substituted heterocyclyl, optionally substituted carbocyclyl, optionally
substituted C2-C10 alkenyl, optionally substituted C2-C10 alkynyl, or -CR7R8R9;
where each R7 and R8 and R9 is independently selected from H, optionally substituted C1-C10 alkyl, optionally
substituted heteroalkyl, optionally substituted carbocyclyl, optionally substituted
heterocyclyl, optionally substituted carbocyclylalkyl, optionally substituted heterocyclylalkyl,
optionally substituted aryl, optionally substituted arylalkyl, optionally substituted
heteroaryl, and optionally substituted heteroarylalkyl;
or R8 and R9, taken together with the carbon atom to which they are attached, form =O (oxo) or
=N-OR7 or =N-CN;
or R7 and R8, taken together on a single carbon atom or on adjacent connected carbon atoms of
(CR7R8)m whether alone or as part of another group, form a 3 to 8 membered carbocyclic ring
or heterocyclic ring;
or R7 and R8, taken together with the nitrogen atom to which they are attached, form an optionally
substituted 5 to 10 membered heterocyclic or heteroaryl ring that optionally contains
one or more additional heteroatom selected from N, O and S as a ring member;
provided that no more than one of or R7 and R8 in -NR7R8 is selected from the group consisting of alkoxy, alkylamino, dialkylamino and heterocyclyl;
and
R1B is selected from optionally substituted carbocyclyl, H, optionally substituted C1-C10
alkyl, optionally substituted heteroalkyl, optionally substituted heterocyclyl, optionally
substituted carbocyclylalkyl, optionally substituted heterocyclylalkyl, optionally
substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl,
or optionally substituted heteroarylalkyl;
R1A is selected from H, optionally substituted C1-C10 alkyl,
and in formulae (IIa) and (IIa')
R2 is H, CH3 or CF3;
R4 is H, CH3 or CF3;
X, is O, S or NH;
Y is O or S;
R1B is selected from H, optionally substituted C1-C10 alkyl, optionally substituted heteroalkyl,
optionally substituted heterocyclyl, optionally substituted cycloalkyl, optionally
substituted cycloalkylalkyl, optionally substituted heterocyclylalkyl, optionally
substituted arylalkyl, or an optionally substituted heteroaryl;
L is a bond, -NR7-, -O-, -S(O)n-, (CR7R8)m, or -(CR7R8)m-NR7-;
W is selected from optionally substituted aryl, optionally substituted heteroaryl,
and -NR7R8,
where each R7 and R8 is independently selected from H, optionally substituted C1-C6 alkoxy, optionally
substituted C1-C6 alkylamino, optionally substituted C1-C6 dialkylamino, optionally
substituted heterocyclyl, optionally substituted C1-C10 alkyl, optionally substituted
C3-C8 cycloalkyl, optionally substituted C4-C10 cycloalkylalkyl, optionally substituted
aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, and optionally
substituted heteroarylalkyl;
and R7 and R8, taken together on a single carbon atom or on adjacent connected carbon atoms of
(CR7R8)m whether alone or as part of another group, form a 3- to 8-membered ring that contains
one or more heteroatoms as ring members;
or R7 and R8, taken together with the nitrogen atom to which they are attached, form an optionally
substituted 5- to 10-membered heterocyclic or heteroaryl ring system that optionally
contains an additional heteroatom selected from N, O and S as a ring member; and
provided that no more than one of or R7 and R8 in -NR7R8 is selected from the group consisting of alkoxy, alkylamino, dialkylamino and heterocyclyl.
[0021] A favored class of compounds of Formula II are those of Formula (IIa) or (IIa'):

where R
2 is H, Me or CF
3; R
4 is H, Me or CF
3; X is O, S or NH; Y is O or S; R
1B is as described for Formula II; L is a bond, -NR
7-, -O-, or -S(O)
n-, (CR
7R
8)
m, or it can be -(CR
7R
8)
m-NR
7-; m is 1-4 and n is 0-2; and W is selected from optionally substituted aryl, optionally
substituted heteroaryl, and -NR
7R
8, where R
7 and R
8 are as defined for Formula II.
[0022] Particular embodiments of the compounds of the invention include thiophene-containing
compounds of Formula (II-Th) and (II-Th'):
where RTh is selected from H, halo, optionally substituted C1-C6 alkyl, CN, S(O)0-2R, -SO2NR2, COOR, CONR2, and C(O)R,
where each R is independently H, halo, CN, or an optionally substituted member selected
from the group consisting of C1-C6 alkyl, C1-C6 alkoxy, C1-C6 alkylamino, di(C1-C6)alkylamino,
C3-C8 cycloalkyl, C4-C10 cycloalkylalkyl, C5-C8 heterocyclyl, C6-C10 heterocyclylalkyl,
aryl, arylalkyl, C5-C6 heteroalkyl, and C6-C10 heteroalkylalkyl;
and two R on the same atom or adjacent atoms can form an optionally substituted heterocyclic
ring that can contain an additional heteroatom selected from N, O and S; and other
structural features are as defined for Formula IIa above.
[0023] The invention includes pharmaceutically acceptable salts of compounds of Formula
II, II', IIa, IIa', II-Th, and II-Th' as well as the neutral compounds.
[0024] The invention also provides pharmaceutical compositions containing such compounds
plus one or more pharmaceutically acceptable carriers or excipients, and the use of
these compounds and compositions for the treatment of specified conditions as further
described herein.
[0025] Intermediates of the following Formula (III) are useful for the preparation of compounds
described above:
where R1A, R1B, R2, R4, Z3, Z4, L and W are as defined for Formula (II) above, or in certain embodiments, these
are the same as the corresponding features defined for Formula (IIa) above;
one of Z1 and Z2 represents N, and the other of Z1 and Z2 represents C;
and the circles inside the two rings indicate that the rings are both aromatic.
[0026] The method of using these intermediates to produce compounds of formula (II) comprises
reacting a compound of Formula (III) with a hydantoin or similar 5-membered heterocyclic
compound of Formula (IV):
where R3, X, Y and Z are as defined for Formula (II) or (II'),
under conditions that promote condensation of the two compounds.
[0027] Typically, the reaction conditions will include a suitable solvent and a base, optionally
a catalytic amount of base, but stoichiometric or larger amounts of base can be used.
Suitable bases are those capable of deprotonating the compound of Formula (IV) to
promote condensation with the compound of Formula (III), and secondary amines that
are capable of reacting with aldehydes of Formula (III) to form an iminium species.
Suitable bases include C1-C4 alkoxides, metal hydrides, tertiary amines such as triethylamine
or diisopropyl ethylamine, DABCO and DBU; and suitable secondary amine bases include
piperidine, morpholine, piperazine, N-methylpiperazine and pyrrolidine. Suitable solvents
include polar aprotic solvents such as NMP, DMF, DMSO, DMA, and dioxane; as well as
protic solvents such as C1-C10 alcohols and diols, e.g., ethanol, propanol, isopropanol,
ethylene glycol, propylene glycol and methoxyethanol. Mixtures of such solvents can
also be used, as can mixtures of one or more of these solvents with a less polar organic
solvent to promote solubility of the reactants. Selection of suitable solvents and
bases for these reactions are well within the level of skill of an ordinary practitioner.
[0028] In some embodiments of the compounds of Formula (III), -L-W represents a group of
the formula -S(O)
1-2R, where R is an alkyl, cycloalkyl, aryl, heteroaryl or similar group, and the product
is a compound of Formula (II) or (II') having the same -L-W group. Such compounds
are conveniently used for the preparation of other compounds of formula (II) or (II'),
because the moiety of formula -S(O)
1-2R is a good leaving group, and can readily be displaced by nucleophiles such as primary
or secondary amines, to introduce other -L-W groups. Thus another method for synthesizing
the compounds of the invention is to react a compound of Formula (V),
wherein -L-W represents a group of the formula -S(O)1-2R, where R is an optionally substituted group selected from C1-C6 alkyl, C3-C8 cycloalkyl,
C4-C10 cycloalkylalkyl, C6-C10 aryl, C5-C6 heteroaryl, C7-C12 arylalkyl, and C6-C12
heteroarylalkyl;
and other variables are as defined for formulas (III) and (IV) above;
with a nucleophilic compound of formula
W'-L'-H
wherein L' is selected from NR7, O and S; and
W' is optionally substituted aryl, optionally substituted heteroaryl optionally substituted
heterocyclyl, optionally substituted C3-C8 cycloalkyl, optionally substituted C2-C10
alkenyl, optionally substituted C2-C10 alkynyl, or CR7R8R9,
where R7, R8 and R9 are as defined above for Formula II
under suitable conditions as described herein to provide a compound of Formula (V'):

[0029] The invention also provides a pharmaceutical composition comprising a compound of
Formula (II). (II'), (IIa) or (IIa') as described herein and at least one pharmaceutically
acceptable carrier or excipient, or two or more pharmaceutically acceptable carriers
and/or excipients. Pharmaceutical compositions comprising at least one of these compounds
can be utilized in methods of treatment such as those described herein.
[0030] In common with the known compounds of Formula (I), the compounds of Formulae (II),
(II'), (IIa) and (IIa') as described herein bind to and inhibit certain kinase proteins,
which is believed to be the basis for their pharmaceutical activity. In certain embodiments,
the protein is a CK2 protein, such as a CK2 protein comprising the amino acid sequence
of SEQ ID NO:1, 2 or 3 or a substantially identical variant thereof, for example.
SEQ ID NO:1 (NP 001886; casein kinase II alpha 1 subunit isoform a [Homo sapiens])

SEQ ID NO:2 (NP 808227; casein kinase II alpha 1 subunit isoform a [Homo sapiens])

SEQ ID NO:3 (NP 808228; casein kinase II alpha 1 subunit isoform b [Homo sapiens])

[0031] Substantially identical variants of these include proteins having at least 90% sequence
homology with one of these, preferably at least 90% sequence identity; and having
at least 50% of the level of
in vitro kinase activity of the specified sequence under typical assay conditions.
[0032] Compounds of the invention can modulate the activity of CK2 protein, either
in vitro or
ex vivo. Suitable methods of such modulation comprise contacting a system comprising the protein
with a compound described herein in an amount effective for modulating the activity
of the protein. The invention accordingly further provides an
in vitro method for modulating casein kinase 2 activity and/or Pim kinase activity in a cell,
which comprises contracting the cell with a compound of the invention as defined above.
[0033] In certain embodiments the activity of the protein is inhibited, and sometimes the
protein is a CK2 protein comprising the amino acid sequence of SEQ ID NO: 1, SEQ ID
NO:2 or SEQ ID NO:3 or a substantially identical variant thereof, for example. In
certain embodiments the CK2 is in a cell or tissue; in other embodiments, it can be
in a cell-free system.
[0034] Compounds of the invention may also be used in methods for inhibiting cell proliferation,
which comprise contacting cells with a compound described herein in an amount effective
to inhibit proliferation of the cells. The cells sometimes are in a cell line, such
as a cancer cell line (
e.
g., breast cancer, prostate cancer, pancreatic cancer, lung cancer, hemopoietic cancer,
colorectal cancer, skin cancer, ovary cancer cell line), for example. In some embodiments,
the cancer cell line is a breast cancer, prostate cancer or pancreatic cancer cell
line. The cells sometimes are in a tissue, can be in a subject, at times are in a
tumor, and sometimes are in a tumor in a subject. In one aspect the invention also
provides a method for inhibiting cell proliferation, which comprises contacting cells
in a cell line with a compound of the invention as defined above.
[0035] In certain embodiments, the method further comprises inducing cell apoptosis. Cells
sometimes are from a subject having macular degeneration.
[0036] A compound described herein may be used in methods for treating a condition related
to aberrant cell proliferation, which comprise administering such a compound to a
subject in need thereof in an amount effective to treat the cell proliferative condition.
In certain embodiments the cell proliferative condition is a tumor-associated cancer,
e.g., a solid or circulating tumor. The cancer sometimes is cancer of the breast,
prostate, pancreas, lung, colorectum, skin, or ovary. In some embodiments, the cell
proliferative condition is a non-tumor cancer, such as a hematopoietic cancer, for
example, including leukemias, e.g., multiple myeloma and lymphomas. The cell proliferative
condition is macular degeneration in some embodiments.
[0037] Compounds of the invention as described above may be used in methods for treating
cancer or an inflammatory disorder or other disorders described herein that are mediated
by excessive activity of one or more of these kinases, in a subject in need of such
treatment. Such methods comprise administering to the subject a therapeutically effective
amount of a therapeutic agent useful for treating such disorder; and administering
to the subject a molecule described herein, e.g., a compound inhibits CK2 in an amount
that is effective to enhance a desired effect of the therapeutic agent.
[0038] Accordingly, the invention further provides a compound of formula (II), (II'), (IIa)
or (IIa') as defined above, or a pharmaceutically acceptable salt or solvate thereof,
for use in
- (a) treating a condition or disease associated with casein kinase 2 activity and/or
Pim kinase activity in a patient by administering to the patient a therapeutically
effective amount of the compound, wherein
the condition or disease is selected from cancer, a vascular disorder, a inflammation,
a pathogenic infection, a immunological disorder, a neurodegenerative disorder, and
a combination thereof, and wherein the cancer is preferably selected from cancer of
the colorectum, breast, lung, liver, pancreas, lymph node, colon, prostate, brain,
head and neck, skin, liver, kidney, blood and heart, and wherein the compound is optionally
administered in combination with one or more additional therapeutic agent, preferably
an anticancer agent; or
- (b) inhibiting cell proliferation, which comprises contacting cells with the compound
in an amount effective to inhibit proliferation of the cells, wherein the cells are
in a tumor in a subject; or
- (c) inhibiting angiogenesis in a subject, which comprises administering to the subject
the compound in an amount effective to inhibit the angiogenesis.
[0039] The molecule that inhibits CK2 is a compound of Formula II, or Formula II' or (IIa)
or (IIa'), or a pharmaceutically acceptable salt or solvate thereof. In certain embodiments,
the desired effect of the therapeutic agent that is enhanced by the molecule that
inhibits CK2 is an increase in apoptosis in at least one type of cell. In certain
embodiments, the cell is a cancer cell and the compound is a compound of Formula (II)
or (IIa) that is a potent inhibitor (IC-50 less than about 100 nM, for example) of
CK2. Preferably, the compound has an IC-50 on Pim of less than about 30 nM, and is
selective for CK2 over Pim kinases. In certain embodiments, the IC-50 for inhibition
of CK2 is lower by at least a factor of ten than activity on Pim; in preferred embodiments,
the compound has an IC-50 for CK2 that is lower than its IC-50 for at least one of
Pim-1, Pim-2 and Pim-3 by about 100-fold or more.
[0040] In some embodiments, the therapeutic agent and the molecule that inhibits CK2 are
administered at substantially the same time. The therapeutic agent and molecule that
inhibits CK2 sometimes are used concurrently by the subject. The therapeutic agent
and the molecule that inhibits CK2 can be combined into one pharmaceutical composition
in certain embodiments; in other embodiments that are admistered as separate compositions.
[0041] Also provided are compositions of matter comprising a compound of the invention as
described herein and an isolated protein. The protein sometimes is a CK2 protein,
such as a CK2 protein comprising the amino acid sequence of SEQ ID NO:1, SEQ ID NO:2
or SEQ ID NO:3 or a substantially identical variant thereof, for example. In some
embodiments, the protein is a Pim protein. Certain compositions comprise a compound
described herein in combination with a cell. The cell may be from a cell line, such
as a cancer cell line. In the latter embodiments, the cancer cell line is sometimes
a breast cancer, prostate cancer, pancreatic cancer, lung cancer, hematopoietic cancer,
colorectal cancer, skin cancer, of ovary cancer cell line.
[0042] The invention is further described in the description that follows. Embodiments falling
outside the scope of claim are included for reference purposes.
BRIEF DESCRIPTION OF THE FIGURES
[0043]
Figure 1 depicts a compound of Formula I as described herein, and shows its IC50 on CK2 (7
nM) and on PIM1 (351 nM), and also shows a plot of inhibition of a panel of 108 kinases
to illustrate its selectivity for these kinases relative to other kinases.
Figure 2 depicts a compound of Formula II as described herein, and shows that it is more potent
on CK2 (3 nM), less potent on PIM1 (1310 nM), and generally more selective towards
various kinases than is the compound in Figure 1.
Figure 3 shows a synthesis scheme for preparing certain compounds of the invention containing
a thiophene ring.
Figure 4 illustrates the syntheses of certain pyrazolotriazines of the invention.
Figure 5 illustrates synthesis methods for introducing various nucleophilic groups onto a
pyrazolo-triazine ring system for preparing compounds of the invention.
Figure 6 illustrates general synthesis routes for making certain pyrazolo-triazine compounds
of the invention.
Figure 7 shows a general synthetic method for making various imidazo-pyrazine ring systems
and for making certain compounds of the invention.
Figure 8 depicts a number of variations of the pyrazolo-triazine compounds within the scope
of the invention.
Figure 9 depicts methods to make certain imidazo-pyridazine compounds within the scope of
the invention.
Figure 10 illustrates a general method for modifying certain substituted compounds of the invention
to introduce additional features.
Figure 11 depicts more methods for modifying substituents on compounds of the invention.
Figure 12 illustrates alternative synthesis routes for making certain compounds of the invention.
Figure 13 depicts formation of an amide compound of the invention from a corresponding carboxylic
acid compound.
Figure 14 depicts a reductive amination method for introducing certain groups onto the compounds
of the invention.
MODES OF CARRYING OUT THE INVENTION
[0044] Compounds of the present invention exert biological activities that include, but
are not limited to, inhibiting cell proliferation, reducing angiogenesis, preventing
or reducing inflammatory responses and pain, and modulating certain immune responses.
Such compounds modulate CK2 activity, as demonstrated by the data herein. Such compounds
therefore can be utilized in multiple applications by a person of ordinary skill in
the art. For example, compounds described herein can be used, for example, for (i)
modulation of protein kinase activity (
e.
g., CK2 activity), (ii) modulation of cell proliferation, (iii) modulation of apoptosis,
and/or (iv) treatments of cell proliferation related disorders (
e.g., administration alone or coadministration with another molecule). In particular,
the compounds of Formula (II) and (IIa) can be used to modulate CK2 activity,
in vitro or
in vivo, and to treat disorders associated with excessive or undesirable levels of CK2 activity,
including cancers, certain inflammatory disorders, vascular disorders, certain skeletal
and muscle disorders, and infections such as protozoal parasite infections and some
viral infections.
Definitions:
[0045] The terms "a" and "an" do not denote a limitation of quantity, but rather denote
the presence of at least one of the referenced item. The terms "a" and "an" are used
interchangeable with "one or more" or "at least one". The term "or" or "and/or" is
used as a function word to indicate that two words or expressions are to be taken
together or individually. The terms "comprising", "having", "including", and "containing"
are to be construed as open-ended terms (i.e., meaning "including, but not limited
to"). The endpoints of all ranges directed to the same component or property are inclusive
and independently combinable.
[0046] The terms "compound(s) of the invention", "these compounds", "such compound(s)",
"the compound(s)", and "the present compound(s)" refer generally to compounds of the
structural Formula (II), (II'), (IIa), (IIa'), (IIb), (IIb'), (IIc), (II-Th), and
(II-Th'), and includes any specific compounds within these formulae whose structure
is disclosed herein. Compounds may be identified either by their chemical structure
and/or chemical name. When the chemical structure and chemical name conflict, the
chemical structure is determinative of the identity of the compound. Furthermore,
the present compounds can modulate, i.e., inhibit or enhance, the biological activity
of a CK2 protein, a Pim protein or both, and thereby is also referred to herein as
a "modulator(s)" or "CK2 and/or Pim modulator(s)". Compounds of Formulae (I), (II),
(II'), (IIa), (IIa'), (IIb), (IIb'), (IIc); (II-Th), and
(II-Th'), including any specific compounds, i.e., species, described herein are exemplary
"modulator".
[0047] The compounds described herein may contain one or more chiral centers and/or double
bonds and therefore, may exist as stereoisomers, such as double-bond isomers (
i.e., geometric isomers such as
E and
Z), enantiomers or diastereomers. The invention includes each of the isolated stereoisomeric
forms (such as the enantiomerically pure isomers, the
E and
Z isomers, and etc.) as well as mixtures of stereoisomers in varying degrees of chiral
purity or percetange of
E and
Z, including racemic mixtures, mixtures of diastereomers, and mixtures of
E and Z isomers. Accordingly, the chemical structures depicted herein encompass all
possible enantiomers and stereoisomers of the illustrated compounds including the
stereoisomencally pure form (
e.
g., geometrically pure, enantiomerically pure or diastereomerically pure) and enantiomeric
and stereoisomeric mixtures. Enantiomeric and stereoisomeric mixtures can be resolved
into their component enantiomers or stereoisomers using separation techniques or chiral
synthesis techniques well known to the skilled artisan. The invention includes each
of the isolated stereoisomeric forms as well as mixtures of stereoisomers in varying
degrees of chiral purity, including racemic mixtures. It also encompasses the various
diastereomers. Other structures may appear to depict a specific isomer, but that is
merely for convenience, and is not intended to limit the invention to the depicted
olefin isomer. When the chemical name does not specify the isomeric form of the compound,
it denotes any one of the possible isomeric forms or a mixtures of those isomeric
forms of the compound.
[0048] The compounds may also exist in several tautomeric forms, and the depiction herein
of one tautomer is for convenience only, and is also understood to encompass other
tautomers of the form shown. Accordingly, the chemical structures depicted herein
encompass all possible tautomeric forms of the illustrated compounds. The term "tautomer"
as used herein refers to isomers that change into one another with great ease so that
they can exist together in equilibrium. For example, ketone and enol are two tautomeric
forms of one compound. In another example, a substituted 1.2,4-triazole derivative
may exist in at least three tautomeric forms as shown below:

[0049] The descriptions of compounds of the present invention are limited by principles
of chemical bonding known to those skilled in the art. Accordingly, where a group
may be substituted by one or more of a number of substituents, such substitutions
are selected so as to comply with principles of chemical bonding and to give compounds
which are not inherently unstable and/or would be known to one of ordinary skill in
the art as likely to be unstable under ambient conditions, such as aqueous, neutral,
and several known physiological conditions. For example, a heterocycloalkyl or heteroaryl
is attached to the remainder of the molecule via a ring heteroatom in compliance with
principles of chemical bonding known to those skilled in the art thereby avoiding
inherently unstable compounds.
[0050] The compounds of the invention often have ionizable groups so as to be capable of
preparation as salts. In that case, wherever reference is made to the compound, it
is understood in the art that a pharmaceutically acceptable salt may also be used.
These salts may be acid addition salts involving inorganic or organic acids or the
salts may, in the case of acidic forms of the compounds of the invention be prepared
from inorganic or organic bases. Frequently, the compounds are prepared or used as
pharmaceutically acceptable salts prepared as addition products of pharmaceutically
acceptable acids or bases. Suitable pharmaceutically acceptable acids and bases are
well-known in the art, such as hydrochloric, sulphuric, hydrobromic, acetic, lactic,
citric, or tartaric acids for forming acid addition salts, and potassium hydroxide,
sodium hydroxide, ammonium hydroxide, caffeine and various amines, for forming basic
salts. Methods for preparation of the appropriate salts are well-established in the
art. In some cases, the compounds may contain both an acidic and a basic functional
group, in which case they may have two ionized groups and yet have no net charge.
Standard methods for the preparation of pharmaceutically acceptable salts and their
formulations are well known in the art, and are disclosed in various references, including
for example, "
Remington: The Science and Practice of Pharmacy", A. Gennaro, ed., 20th edition, Lippincott,
Williams & Wilkins, Philadelphia, PA.
[0051] "Solvate", as used herein, means a compound formed by solvation (the combination
of solvent molecules with molecules or ions of the solute), or an aggregate that consists
of a solute ion or molecule, i.e., a compound of the invention, with one or more solvent
molecules. When water is the solvent, the corresponding solvate is "hydrate". Examples
of hydrate include, but are not limited to, hemihydrate, monohydrate, dihydrate, trihydrate,
hexahydrate, etc. It should be understood by one of ordinary skill in the art that
the pharmaceutically acceptable salt, and/or prodrug of the present compound may also
exist in a solvate form. The solvate is typically formed via hydration which is either
part of the preparation of the present compound or through natural absorption of moisture
by the anhydrous compound of the present invention.
[0052] The term "ester" means any ester of a present compound in which any of the -COOH
functions of the molecule is replaced by a -COOR function, in which the R moiety of
the ester is any carbon-containing group which forms a stable ester moiety, including
but not limited to alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, aryl, arylalkyl,
heterocyclyl, heterocyclylalkyl and substituted derivatives thereof. The hydrolysable
esters of the present compounds are the compounds whose carboxyls are present in the
form of hydrolysable ester groups. That is, these esters are pharmaceutically acceptable
and can be hydrolyzed to the corresponding carboxyl acid
in vivo. These esters may be conventional ones, including lower alkanoyloxyalkyl esters, e.g.
pivaloyloxymethyl and 1-pivaloyloxyethyl esters; lower alkoxycarbonylalkyl esters,
e.g., methoxycarbonyloxymethyl, 1-ethoxycarbonyloxyethyl, and 1-isopropylcarbonyloxyethyl
esters; lower alkoxymethyl esters, e.g., methoxymethyl esters, lactonyl esters, benzofuran
keto esters, thiobenzofuran keto esters; lower alkanoylaminomethyl esters, e.g., acetylaminomethyl
esters. Other esters can also be used, such as benzyl esters and cyano methyl esters.
Other examples of these esters include: (2,2-dimethyl-1-oxypropyloxy)methyl esters;
(1RS)-1-acetoxyethyl esters, 2-[(2-methylpropyloxy)carbonyl]-2-pentenyl esters, 1-[[(1-methylethoxy)carbonyl]-
oxy]ethyl esters; isopropyloxycarbonyloxyethyl esters, (5-methyl-2-oxo-1,3- dioxole-4-yl)
methyl esters, 1-[[(cyclohexyloxy)carbonyl]oxy]ethyl esters; 3,3-dimethyl-2-oxobutyl
esters. It is obvious to those skilled in the art that hydrolysable esters of the
compounds of the present invention can be formed at free carboxyls of said compounds
by using conventional methods. Representative esters include pivaloyloxymethyl esters,
isopropyloxycarbonyloxyethyl esters and (5-methyl-2-oxo-1,3-dioxole-4-yl)methyl esters.
[0053] "Protecting group" refers to a grouping of atoms that when attached to a reactive
functional group in a molecule masks, reduces or prevents reactivity of the functional
group. Examples of protecting groups can be found in
Green et al., "Protective Groups in Organic Chemistry", (Wiley, 2nd ed. 1991) and
Harrison et al., "Compendium of Synthetic Organic Methods", Vols. 1-8 (John Wiley
and Sons, 1971-1996). Representative amino protecting groups include, but are not limited to, formyl,
acetyl, trifluoroacetyl, benzyl, benzyloxycarbonyl ("CBZ"),
tert-butoxycarbonyl ("Boc"), trimethylsilyl ("TMS"), 2-trimethylsilyl-ethanesulfonyl ("SES"),
trityl and substituted trityl groups, allyloxycarbonyl, 9-fluorenylmethyloxycarbonyl
and ("FMOC"), nitro-veratryloxycarbonyl ("NVOC"). Representative hydroxy protecting
groups include, but are not limited to, those where the hydroxy group is either acylated
or alkylated such as benzyl, and trityl ethers as well as alkyl ethers, tetrahydropyranyl
ethers, trialkylsilyl ethers and allyl ethers.
[0054] As used herein, "pharmaceutically acceptable" means suitable for use in contact with
the tissues of humans and animals without undue toxicity, irritation, allergic response,
and the like, commensurate with a reasonable benefit/risk ratio, and effective for
their intended use within the scope of sound medical judgment.
[0055] "Excipient" refers to a diluent, adjuvant, vehicle, or carrier with which a compound
is administered.
[0056] An "effective amount" or "therapeutically effective amount" is the quantity of the
present compound in which a beneficial outcome is achieved when the compound is administered
to a patient or alternatively, the quantity of compound that possesses a desired activity
in vivo or in vitro. In the case of proliferative disorders, a beneficial clinical
outcome includes reduction in the extent or severity of the symptoms associated with
the disease or disorder and/or an increase in the longevity and/or quality of life
of the patient compared with the absence of the treatment. For example, for a subject
with cancer, a "beneficial clinical outcome" includes a reduction in tumor mass, a
reduction in the rate of tumor growth, a reduction in metastasis, a reduction in the
severity of the symptoms associated with the cancer and/or an increase in the longevity
of the subject compared with the absence of the treatment. The precise amount of compound
administered to a subject will depend on the type and severity of the disease or condition
and on the characteristics of the patient, such as general health, age, sex, body
weight and tolerance to drugs. It will also depend on the degree, severity and type
of proliferative disorder. The skilled artisan will be able to determine appropriate
dosages depending on these and other factors.
[0057] As used herein, the terms "alkyl," "alkenyl" and "alkynyl" include straight-chain,
branched-chain and cyclic monovalent hydrocarbyl radicals, and combinations of these,
which contain only C and H when they are unsubstituted. Examples include methyl, ethyl,
isobutyl, cyclohexyl, cyclopentylethyl, and 2-propenyl, 3-butynyl. The total number
of carbon atoms in each such group is sometimes described herein,
e.g., when the group can contain up to ten carbon atoms it can be represented as 1-10C
or as C1-C10 or C1-10. When heteroatoms (N, O and S typically) are allowed to replace
carbon atoms as in heteroalkyl groups, for example, the numbers describing the group,
though still written as
e.g. C1-C6, represent the sum of the number of carbon atoms in the group plus the number
of such heteroatoms that are included as replacements for carbon atoms in the backbone
of the ring or chain being described. Where a ring is included, it is understood that
the group contains at least three carbon atoms as a 3-membered ring is the smallest
size for a ring.
[0058] Typically, the alkyl, alkenyl and alkynyl substituents of the invention contain 1-10C
(alkyl) or 2-10C (alkenyl or alkynyl), or 3-10C when a ring is included. Preferably
they contain 1-8C (alkyl) or 2-8C (alkenyl or alkynyl) or 3-8C when a ring is included.
Sometimes they contain 1-4C (alkyl) or 2-4C (alkenyl or alkynyl). A single group can
include more than one type of multiple bond, or more than one multiple bond; such
groups are included within the definition of the term "alkenyl" when they contain
at least one carbon-carbon double bond, and are included within the term "alkynyl"
when they contain at least one carbon-carbon triple bond; provided, however, that
the presence of multiple bonds does not produce an aromatic ring.
[0059] Alkyl, alkenyl and alkynyl groups are often optionally substituted to the extent
that such substitution makes sense chemically.
[0060] "Optionally substituted" as used herein indicates that the particular group or groups
being described may have no non-hydrogen substituents, or the group or groups may
have one or more non-hydrogen substituents. If not otherwise specified, the total
number of such substituents that may be present is equal to the number of H atoms
present on the unsubstituted form of the group being described. Where an optional
substituent is attached via a double bond, such as a carbonyl oxygen (=O), the group
takes up two available valences, so the total number of substituents that may be included
is reduced according to the number of available valences.
[0061] "Substituted," when used to modify a specified group or radical, means that one or
more hydrogen atoms of the specified group or radical are each, independently of one
another, replaced with the same or different substituent(s).
[0062] Substituent groups useful for substituting saturated carbon atoms in the specified
group or radical include, but are not limited to -R
a, halo, -O
-, =O, -OR
b, -SR
b, -S
-, =S, -NR
cR
c, =NR
b, =N-OR
b, trihalomethyl, -CF
3, -CN, -OCN, -SCN, -NO, -NO
2, =N
2, -N
3, -S(O)
2R
b, -S(O)
2NR
b, -S(O)
2O
-, -S(O)
2OR
b, -OS(O)
2R
b, -OS(O)
2O
-, -OS(O)
2OR
b, -P(O)(O
-)
2, -P(O)(OR
b)(O
-), -P(O)(OR
b)(OR
b), -C(O)R
b, -C(S)R
b, -C(NR
b)R
b, -C(O)O
-, -C(O)OR
b, -C(S)OR
b, -C(O)NR
cR
c, -C(NR
b)NR
cR
c, -OC(O)R
b, -OC(S)R
b, -OC(O)O
-, -OC(O)OR
b, -OC(S)OR
b, -NR
bC(O)R
b, -NR
bC(S)R
b, -NR
bC(O)O
-, -NR
bC(O)OR
b, -NR
bC(S)OR
b, -NR
bC(O)NR
cR
c, -NR
bC(NR
b)R
b and -NR
bC(NR
b)NR
cR
c, where R
a is selected from the group consisting of alkyl, cycloalkyl, heteroalkyl, cycloheteroalkyl,
aryl, arylalkyl, heteroaryl and heteroarylalkyl; each R
b is independently hydrogen or R
a; and each R
c is independently R
b or alternatively, the two R
cs may be taken together with the nitrogen atom to which they are bonded form a 4-,
5-, 6- or 7-membered cycloheteroalkyl which may optionally include from 1 to 4 of
the same or different additional heteroatoms selected from the group consisting of
O, N and S. As specific examples, -NR
cR
c is meant to include -NH
2, -NH-alkyl, N-pyrrolidinyl and N-morpholinyl. As another specific example, a substituted
alkyl is meant to include -alkylene-O-alkyl, -alkylene-heteroaryl, -alkylene-cycloheteroalkyl,
-alkylene-C(O)OR
b, -alkylene-C(O)NR
bR
b, and -CH
2-CH
2-C(O)-CH
3. The one or more substituent groups, taken together with the atoms to which they
are bonded, may form a cyclic ring including cycloalkyl and cycloheteroalkyl.
[0063] Similarly, substituent groups useful for substituting unsaturated carbon atoms in
the specified group or radical include, but are not limited to, -R
a, halo, -O
-, -OR
b, -SR
b, -S
-, -NR
cR
c, trihalomethyl, -CF
3, -CN, -OCN, -SCN, -NO, -NO
2, -N
3, -S(O)
2R
b, -S(O)
2O
-, -S(O)
2OR
b, -OS(O)
2R
b, -OS(O)
2O
-, -OS(O)
2OR
b, -P(O)(O
-)
2, -P(O)(OR
b)(O
-), -P(O)(OR
b)(OR
b), -C(O)R
b, -C(S)R
b, -C(NR
b)R
b, -C(O)O
-, -C(O)OR
b, -C(S)OR
b, -C(O)NR
cR
c, -C(NR
b)NR
cR
c, -OC(O)R
b, -OC(S)R
b, -OC(O)O
-, -OC(O)OR
b, -OC(S)OR
b, -NR
bC(O)R
b, -NR
bC(S)R
b, -NR
bC(O)O
-, -NR
bC(O)OR
b, -NR
bC(S)OR
b, -NR
bC(O)NR
cR
c, -NR
bC(NR
b)R
b and -NR
bC(NR
b)NR
cR
c, where R
a, R
b and R
c are as previously defined.
[0064] Substituent groups useful for substituting nitrogen atoms in heteroalkyl and cycloheteroalkyl
groups include, but are not limited to, -R
a, -O
-, -OR
b, -SR
b, -S
-, -NR
cR
c, trihalomethyl, -CF
3, -CN, -NO, -NO
2, -S(O)
2R
b, -S(O)
2O
-, -S(O)
2OR
b, -OS(O)
2R
b, -OS(O)
2O
-, -OS(O)
2OR
b, -P(O)(O
-)
2, -P(O)(OR
b)(O
-), -P(O)(OR
b)(OR
b), -C(O)R
b, -C(S)R
b, -C(NR
b)R
b, -C(O)OR
b, -C(S)OR
b, -C(O)NR
cR
c, -C(NR
b)NR
cR
c, -OC(O)R
b, -OC(S)R
b, -OC(O)OR
b, -OC(S)OR
b, -NR
bC(O)R
b, -NR
bC(S)R
b, -NR
bC(O)OR
b, -NR
bC(S)OR
b, -NR
bC(O)NR
cR
c, -NR
bC(NR
b)R
b and -NR
bC(NH
b)NR
cR
c, where R
a, R
b and R
c are as previously defined.
[0065] Alkyl, alkenyl and alkynyl groups can alternatively or in addition be substituted
by C1-C8 acyl, C2-C8 heteroacyl, C6-C10 aryl, C3-C8 cycloalkyl, C3-C8 heterocyclyl,
or C5-C10 heteroaryl, each of which can be substituted by one or more R, halo, =O,
=N-CN, =N-OR, =NR, OR, NR
2, SR, SO
2R, SO
2NR
2, NRSO
2R, NRCONR
2, NRCSNR
2, NRC(=NR)NR
2, NRCOOR, NRCOR, CN, C≡CR, COOR, CONR
2, OOCR, COR, and NO
2, wherein each R is independently H, C1-C8 alkyl, C2-C8 heteroalkyl, C1-C8 acyl, C2-C8
heteroacyl, C2-C8 alkenyl, C2-C8 heteroalkenyl, C2-C8 alkynyl, C2-C8 heteroalkynyl,
C3-C8 heterocyclyl, C4-C10 heterocyclylalkyl, C6-C10 aryl, or C5-C10 heteroaryl, and
each R is optionally substituted with one or more (typically up to three) halo, =O,
=N-CN, =N-OR', =NR', OR', NR'
2, SR', SO
2R', SO
2NR'
2, NR'SO
2R', NR'CONR'
2, NR'CSNR'
2, NR'C(=NR')NR'
2, NR'COOR', NR'COR', CN, C'≡CR', COOR', CONR'
2, OOCR', COR', and NO
2, wherein each R' is independently H, C1-C8 alkyl, C2-C8 heteroalkyl, C1-C8 acyl,
C3-C8 heterocyclyl, C2-C8 heteroacyl, C6-C10 aryl or C5-C10 heteroaryl.
[0066] Where any of these substituents contains two R or R' groups on the same or adjacent
atoms (
e.g., -NR
2, or -NR-C(O)R), the two R or R' groups can optionally be taken together with the
atom(s) in the substituent group to which they are attached to form a ring having
5-8 ring members, which can include another heteroatom as a ring member (N, O or S)
and can be substituted with one or more halo, =O, =N-CN, =N-OR, =NR, OR, NR
2, SR, SO
2R, SO
2NR
2, NRSO
2R, NRCONR
2, NRCSNR
2, NRC(=NR)NR
2, NRCOOR, NRCOR, CN, C≡CR, COOR, CONR
2, OOCR, COR, and NO
2, wherein each R is independently H, C1-C8 alkyl, C2-C8 heteroalkyl, C1-C8 acyl, C2-C8
heteroacyl, C2-C8 alkenyl, C2-C8 heteroalkenyl, C2-C8 alkynyl, C2-C8 heteroalkynyl,
C3-C8 heterocyclyl, C4-C10 heterocyclylalkyl, C6-C10 aryl, or C5-C10 heteroaryl, and
each R is optionally substituted with halo, =O, =N-CN, =N-OR', =NR', OR', NR'
2, SR', SO
2R', SO
2NR'
2, NR'SO
2R', NR'CONR'
2, NR'CSNR'
2, NR'C(=NR')NR'
2, NR'COOR', NR'COR', CN, C≡CR', COOR', CONR'
2, OOCR', COR', and NO
2, wherein each R' is independently H, C1-C8 alkyl, C2-C8 heteroalkyl, C1-C8 acyl,
C3-C8 heterocyclyl, C2-C8 heteroacyl, C6-C10 aryl or C5-C10 heteroaryl, and each of
the substitutable groups on R' can be substituted with one or more (
e.
g., up to three) halo, piperidinyl, pyrrolidinyl, piperazinyl, morpholinyl, CN, C1-C4
alkoxy, OH, OAc, NH
2, C1-C4 alkyl amine, di(C1-C4 alkyl)amine, NHAc, NHCOOMe, NHCOOEt, NHCOOtBu, NHSO
2Me, SMe, SO
2Me, SO
2NH
2, SO
2NMe
2, COOH, CONH
2, COOMe, COOEt, CONHMe, or CONMe
2.
[0067] "Acetylene" substituents are 2-10C alkynyl groups that contain at least one carbon-carbon
triple bond and are optionally substituted with the groups described herein as suitable
for alkyl groups; in some embodiments, the alkynyl groups are of the formula -C≡C-R
a, wherein R
a is H or C1-C8 alkyl, C2-C8 heteroalkyl, C2-C8 alkenyl, C2-C8 heteroalkenyl, C2-C8
alkynyl, C2-C8 heteroalkynyl, C1-C8 acyl, C2-C8 heteroacyl, C6-C10 aryl, C5-C10 heteroaryl,
C7-C12 arylalkyl, or C6-C12 heteroarylalkyl.
[0068] Each R
a group is optionally substituted with one or more substituents selected from halo,
=O, =N-CN, =N-OR', =NR', OR', NR'
2, SR', SO
2R', SO
2NR'
2, NR'SO
2R', NR'CONR'
2, NR'CSNR'
2, NR'C(=NR')NR'
2, NR'COOR', NR'COR', CN, COOR', CONR'
2, OOCR', COR', and NO
2, wherein each R' is independently H, C1-C6 alkyl, C2-C6 heteroalkyl, C1-C6 acyl,
C2-C6 heteroacyl, C6-C10 aryl, C5-C10 heteroaryl, C7-12 arylalkyl, or C6-12 heteroarylalkyl,
each of which is optionally substituted with one or more groups selected from halo,
CN, C1-C4 alkyl, C2-C4 heteroalkyl, C1-C6 acyl, C1-C6 heteroacyl, C1-C4 alkoxy, C1-C4
alkylamino, di(C1-C4 alkyl)amino, hydroxy, amino, and =O; and wherein two R' can be
linked to form a 3-7 membered ring optionally containing up to three heteroatoms selected
from N, O and S. In some embodiments, R
a of -C≡C-R
a is H or Me.
[0069] "Heteroalkyl", "heteroalkenyl", and "heteroalkynyl" are defined similarly to the
corresponding hydrocarbyl (alkyl, alkenyl and alkynyl) groups, but the 'hetero' terms
refer to groups that contain 1-3 O, S or N heteroatoms or combinations thereof within
the backbone residue; thus at least one carbon atom of a corresponding alkyl, alkenyl,
or alkynyl group is replaced by one of the specified heteroatoms to form, respectively,
a heteroalkyl, heteroalkenyl, or heteroalkynyl group. The typical and preferred sizes
for heteroforms of alkyl, alkenyl and alkynyl groups are generally the same as for
the corresponding hydrocarbyl groups, and the substituents that may be present on
the heteroforms are the same as those described above for the hydrocarbyl groups.
For reasons of chemical stability, it is also understood that, unless otherwise specified,
such groups do not include more than two contiguous heteroatoms except where an oxo
group is present on N or S as in a nitro or sulfonyl group.
[0070] While "alkyl" as used herein includes cycloalkyl and cycloalkylalkyl groups, the
term "cycloalkyl" may be used herein to describe a carbocyclic non-aromatic group
that is connected via a ring carbon atom, and "cycloalkylalkyl" may be used to describe
a carbocyclic non-aromatic group that is connected to the molecule through an alkyl
linker.
[0071] Similarly, "heterocyclyl" may be used to describe a non-aromatic cyclic group that
contains at least one heteroatom (typically selected from N, O and S) as a ring member
and that is connected to the molecule via a ring atom, which may be C (carbon-linked)
or N (nitrogen-linked); and "heterocyclylalkyl" may be used to describe such a group
that is connected to another molecule through a linker. The heterocyclyl can be fully
saturated or partially saturated, but non-aromatic. The sizes and substituents that
are suitable for the cycloalkyl, cycloalkylalkyl, heterocyclyl, and heterocyclylalkyl
groups are the same as those described above for alkyl groups. The heterocyclyl groups
typically contain 1, 2 or 3 heteroatoms, selected from N, O and S as ring members;
and the N or S can be substituted with the groups commonly found on these atoms in
heterocyclic systems. As used herein, these terms also include rings that contain
a double bond or two, as long as the ring that is attached is not aromatic. The substituted
cycloalkyl and heterocyclyl groups also include cycloalkyl or heterocyclic rings fused
to an aromatic ring or heteroaromatic ring, provided the point of attachment of the
group is to the cycloalkyl or heterocyclyl ring rather than to the aromatic / heteroaromatic
ring.
[0072] Like alkyl groups, the cycloalkyl and heterocyclyl groups described herein can be
substituted to the extent permitted by their valence and stability considerations,
which are well understood by those of skill in the art. Substituents for the cycloalkyl
and heterocyclyl rings or ring systems include those described herein as suitable
for placement on alkyl groups.
[0073] As used herein, "acyl" encompasses groups comprising an alkyl, alkenyl, alkynyl,
aryl or arylalkyl radical attached at one of the two available valence positions of
a carbonyl carbon atom, and heteroacyl refers to the corresponding groups wherein
at least one carbon other than the carbonyl carbon has been replaced by a heteroatom
chosen from N, O and S. Thus heteroacyl includes, for example, -C(=O)OR and -C(=O)NR
2 as well as -C(=O)-heteroaryl.
[0074] Acyl and heteroacyl groups are bonded to any group or molecule to which they are
attached through the open valence of the carbonyl carbon atom. Typically, they are
C1-C8 acyl groups, which include formyl, acetyl, pivaloyl, and benzoyl, and C2-C8
heteroacyl, groups, which include methoxyacetyl, ethoxycarbonyl, and 4-pyridinoyl.
The hydrocarbyl groups, aryl groups, and heteroforms of such groups that comprise
an acyl or heteroacyl group can be substituted with the substituents described herein
as generally suitable substituents for each of the corresponding component of the
acyl or heteroacyl, group.
[0075] "Aromatic" moiety or "aryl" moiety refers to a monocyclic or fused bicyclic moiety
having the well-known characteristics of aromaticity; examples include phenyl and
naphthyl. Similarly, "heteroaromatic" and "heteroaryl," refer to such monocyclic or
fused bicyclic ring systems which contain as ring members one or more heteroatoms
selected from O, S and N. The inclusion of a heteroatom permits aromaticity in 5-membered
rings as well as 6-membered rings. Typical heteroaromatic systems include monocyclic
C5-C6 aromatic groups such as pyridyl, pyrimidyl, pyrazinyl, thienyl, furanyl, pyrrolyl,
pyrazolyl, thiazolyl, oxazolyl, triazolyl, triazinyl, tetrazolyl, tetrazinyl, and
imidazolyl and the fused bicyclic moieties formed by fusing one of these monocyclic
groups with a phenyl ring or with any of the heteroaromatic monocyclic groups to form
a C8-C10 bicyclic group such as indolyl, benzimidazolyl, indazolyl, benzotriazolyl,
isoquinolyl, quinolyl, benzothiazolyl, benzofuranyl, pyrazolopyridyl, quinazolinyl,
quinoxalinyl and cinnolinyl. Any monocyclic or fused ring bicyclic system which has
the characteristics of aromaticity in terms of electron distribution throughout the
ring system is included in this definition. It also includes bicyclic groups where
at least the ring which is directly attached to the remainder of the molecule has
the characteristics of aromaticity. Typically, the ring systems contain 5-12 ring
member atoms and up to four heteroatoms selected from N, O and S. Frequently, the
monocyclic heteroaryls contain 5-6 ring members and up to three such heteroatoms,
and the bicyclic heteroaryls contain 8-10 ring members and up to four such heteroatoms.
The number and placement of heteroatoms in such rings is in accordance with the well-known
limitations of aromaticity and stability, where stability requires the heteroaromatic
group to be stable enough to be exposed to water without rapid degradation.
[0076] Aryl and heteroaryl moieties may be substituted with a variety of substituents including
C1-C8 alkyl, C2-C8 alkenyl, C2-C8 alkynyl, C5-C12 aryl, C1-C8 acyl, and heteroforms
of these, each of which can itself be further substituted; other substituents for
aryl and heteroaryl moieties include halo, OR, NR
2, SR, SO
2R, SO
2NR
2, NRSO
2R, NRCONR
2, NRCSNR
2, NRC(=NR)NR
2, NRCOOR, NRCOR, CN, C≡CR, COOR, CONR
2, OOCR, COR, and NO
2, wherein each R is independently H, C1-C8 alkyl, C2-C8 heteroalkyl, C2-C8 alkenyl,
C2-C8 heteroalkenyl, C2-C8 alkynyl, C2-C8 heteroalkynyl, C3-C8 heterocyclyl, C4-C10
heterocyclylalkyl, C6-C10 aryl, C5-C10 heteroaryl, C7-C12 arylalkyl, or C6-C12 heteroarylalkyl,
and each R is optionally substituted as described above for alkyl groups. The substituent
groups on an aryl or heteroaryl group may of course be further substituted with the
groups described herein as suitable for each type of such substituents or for each
component of the substituent. Thus, for example, an arylalkyl substituent may be substituted
on the aryl portion with substituents described herein as typical for aryl groups,
and it may be further substituted on the alkyl portion with substituents described
herein as typical or suitable for alkyl groups. Where a substituent group contains
two R groups on the same or adjacent atoms (
e.g.,-NR
2, or -NR-C(O)R), the two R groups can optionally be taken together with the atom(s)
in the substituent group to which the are attached to form a ring having 5-8 ring
members, which can be substituted as allowed for the R itself, and can contain an
additional heteroatom (N, O or S) as a ring member.
[0077] Similarly, "arylalkyl" and "heteroarylalkyl" refer to aromatic and heteroaromatic
ring systems which are bonded to their attachment point through a linking group such
as an alkylene, including substituted or unsubstituted, saturated or unsaturated,
cyclic or acyclic linkers. Typically the linker is C1-C8 alkyl or a hetero form thereof.
These linkers may also include a carbonyl group, thus making them able to provide
substituents as an acyl or heteroacyl moiety. An aryl or heteroaryl ring in an arylalkyl
or heteroarylalkyl group may be substituted with the same substituents described above
for aryl groups. Preferably, an arylalkyl group includes a phenyl ring optionally
substituted with the groups defined above for aryl groups and a C1-C4 alkylene that
is unsubstituted or is substituted with one or two C1-C4 alkyl groups or heteroalkyl
groups, where the alkyl or heteroalkyl groups can optionally cyclize to form a ring
such as cyclopropane, dioxolane, or oxacyclopentane. Similarly, a heteroarylalkyl
group preferably includes a C5-C6 monocyclic heteroaryl group that is optionally substituted
with the groups described above as substituents typical on aryl groups and a C1-C4
alkylene that is unsubstituted or is substituted with one or two C1-C4 alkyl groups
or heteroalkyl groups, or it includes an optionally substituted C5-C6 monocyclic heteroaryl
and a C1-C4 heteroalkylene that is unsubstituted or is substituted with one or two
C1-C4 alkyl or heteroalkyl groups, where the alkyl or heteroalkyl groups can optionally
cyclize to form a ring such as cyclopropane, dioxolane, or oxacyclopentane.
[0078] Where an arylalkyl or heteroarylalkyl group is described as optionally substituted,
the substituents may be on either the alkyl or heteroalkyl portion or on the aryl
or heteroaryl portion of the group. The substituents optionally present on the alkyl
or heteroalkyl portion are the same as those described above for alkyl groups generally;
the substituents optionally present on the aryl or heteroaryl portion are the same
as those described above for aryl groups generally.
[0079] "Arylalkyl" groups as used herein are hydrocarbyl groups if they are unsubstituted,
and are described by the total number of carbon atoms in the ring and alkylene or
similar linker. Thus a benzyl group is a C7-arylalkyl group, and phenylethyl is a
C8-arylalkyl.
[0080] "Heteroarylalkyl" as described above refers to a moiety comprising an aryl group
that is attached through a linking group, and differs from "arylalkyl" in that at
least one ring atom of the aryl moiety or one atom in the linking group is a heteroatom
selected from N, O and S. The heteroarylalkyl groups are described herein according
to the total number of atoms in the ring and linker combined, and they include heteroaryl
groups linked through a hydrocarbyl linker such as an alkylene; and heteroaryl groups
linked through a heteroalkyl linker. Thus, for example, C7-heteroarylalkyl would include
pyridylmethyl and N-pyrrolylmethoxy.
[0081] "Alkylene" as used herein refers to a divalent hydrocarbyl group; because it is divalent,
it can link two other groups together. Typically it refers to -(CH
2)
n- where n is 1-8 and preferably n is 1-4, though where specified, an alkylene can
also be substituted by other groups, and can be of other lengths, and the open valences
need not be at opposite ends of a chain. Thus -CH(Me)- and -C(Me)
2- may also be referred to as alkylenes, as can a cyclic group such as cyclopropan-1,1-diyl.
Where an alkylene group is substituted, the substituents include those typically present
on alkyl groups as described herein.
[0082] In general, any alkyl, alkenyl, alkynyl, acyl, or aryl or arylalkyl group or any
heteroform of one of these groups that is contained in a substituent may itself optionally
be substituted by additional substituents. The nature of these substituents is similar
to those recited with regard to the primary substituents themselves if the substituents
are not otherwise described. Thus, where an embodiment of, for example, R
x is alkyl, this alkyl may optionally be substituted by the remaining substituents
listed as embodiments for R
x where this makes chemical sense, and where this does not undermine the size limit
provided for the alkyl
per se;
e.g., alkyl substituted by alkyl or by alkenyl would simply extend the upper limit of carbon
atoms for these embodiments, and is not included. However, alkyl substituted by aryl,
amino, alkoxy, =O, and the like would be included within the scope of the invention,
and the atoms of these substituent groups are not counted in the number used to describe
the alkyl, alkenyl, etc. group that is being described. Where no number of substituents
is specified, each such alkyl, alkenyl, alkynyl, acyl, or aryl group may be substituted
with a number of substituents according to its available valences; in particular,
any of these groups may be substituted with fluorine atoms at any or all of its available
valences, for example.
[0083] "Heteroform" as used herein refers to a derivative of a group such as an alkyl, aryl,
or acyl, wherein at least one carbon atom of the designated carbocyclic group has
been replaced by a heteroatom selected from N, O and S. Thus the heteroforms of alkyl,
alkenyl, alkynyl, acyl, aryl, and arylalkyl are heteroalkyl, heteroalkenyl, heteroalkynyl,
heteroacyl, heteroaryl, and heteroarylalkyl, respectively. It is understood that no
more than two N, O or S atoms are ordinarily connected sequentially, except where
an oxo group is attached to N or S to form a nitro or sulfonyl group.
[0084] "Halo", as used herein includes fluoro, chloro, bromo and iodo. Fluoro and chloro
are often preferred.
[0085] "Amino" as used herein refers to NH
2, but where an amino is described as "substituted" or "optionally substituted", the
term includes NR'R" wherein each R' and R" is independently H, or is an alkyl, alkenyl,
alkynyl, acyl, aryl, or arylalkyl group or a heteroform of one of these groups, and
each of the alkyl, alkenyl, alkynyl, acyl, aryl, or arylalkyl groups or heteroforms
of one of these groups is optionally substituted with the substituents described herein
as suitable for the corresponding group. The term also includes forms wherein R' and
R" are taken together with the N to which they are attached to form a 3-8 membered
ring which may be saturated, unsaturated or aromatic and which contains 1-3 heteroatoms
independently selected from N, O and S as ring members, and which is optionally substituted
with the substituents described as suitable for alkyl groups or, if NR'R" is an aromatic
group, it is optionally substituted with the substituents described as typical for
heteroaryl groups.
[0086] As used herein, the term "carbocycle", "carbocyclyl", or "carbocyclic" refers to
a cyclic ring containing only carbon atoms in the ring, whereas the term "heterocycle"
or "heterocyclic" refers to a ring comprising a heteroatom. The carbocyclyl can be
fully saturated or partially saturated, but non-aromatic. For example, the carbocyclyl
encompasses cycloalkyl. The carbocyclic and heterocyclic structures encompass compounds
having monocyclic, bicyclic or multiple ring systems; and such systems may mix aromatic,
heterocyclic, and carbocyclic rings. Mixed ring systems are described according to
the ring that is attached to the rest of the compound being described; for example,
where W represents 1,2,3,4-tetrahydronaphth-1-yl, the group would be encompassed by
an optionally substituted cycloalkyl, or carbocyclic group, while the group 1,2,3,4-tetrahydronaphth-6-yl
would be included within optionally substituted aromatic groups.
[0087] As used herein, the term "heteroatom" refers to any atom that is not carbon or hydrogen,
such as nitrogen, oxygen or sulfur. When it is part of the backbone or skeleton of
a chain or ring, a heteroatom must be at least divalent, and will typically be selected
from N, O, P, and S.
[0088] Illustrative examples of heterocycles and heteroaryls include but are not limited
to tetrahydrofuran, 1,3-dioxolane, 2,3-dihydrofuran, pyran, tetrahydropyran, benzofuran,
isobenzofuran, 1,3-dihydro-isobenzofuran, isoxazole, 4,5-dihydroisoxazole, piperidine,
pyrrolidine, pyrrolidin-2-one, pyrrole, pyridine, pyrimidine, octahydro-pyrrolo[3,4
b]pyridine, piperazine, pyrazine, morpholine, thiomorpholine, imidazole, imidazolidine
2,4-dione, 1,3-dihydrobenzimidazol-2-one, indole, thiazole, benzothiazole, thiadiazole,
thiophene, tetrahydro thiophene 1,1-dioxide, diazepine, triazole, guanidine, diazabicyclo[2.2.1]heptane,
2,5-diazabicyclo[2.2.1]heptane, 2,3,4,4a,9,9a-hexahydro-1H-β-carboline, oxirane, oxetane,
tetrahydropyran, dioxane, lactones, aziridine, azetidine, piperidine, lactams, and
may also encompass heteroaryls. Other illustrative examples of heteroaryls include
but are not limited to furan, pyrrole, pyridine, pyrimidine, imidazole, benzimidazole
and triazole.
Embodiments of the Compounds:
[0089] The compounds of the invention have structural Formula (II) or (II') as shown above
(including IIa, IIa', IIb, IIb', II-TH, and II-TH'). These compounds are typically
more selective for CK2, and are highly potent on CK2.
[0090] In one embodiment of Formula (II) or (II'), the optionally substituted carbocyclyl
is an optionally substituted C3-C8 cycloalkyl; the optionally substituted carbocyclylalkyl
is an optionally substituted C4-C10 cycloalkylalkyl; and the optionally substituted
heteroalkyl is an optionally substituted C1-C6 alkoxy, optionally substituted C1-C6
alkylamino, or optionally substituted C1-C6 dialkylamino.
[0091] In one embodiment of Formula (II) or (II'), -L-W is -NHR
7, -OR
7, or -S(O)
nR
7; n is 0, 1, or 2; and R
7 is optionally substituted C1-C10 alkyl, optionally substituted heteroalkyl, optionally
substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl,
optionally substituted heteroarylalkyl, optionally substituted carbocyclyl, optionally
substituted heterocyclyl, optionally substituted carbocyclylalkyl, or optionally substituted
heterocyclylalkyl.
[0092] In one embodiment of Formula (II) or (II'), -L-W is -NR
7R
8; and R
7 and R
8, taken together with the nitrogen atom to which they are attached, form an optionally
substituted hetercyclyl which optionally contains one or more additional heteroatom
as ring members.
[0093] In one embodiment of Formula (II) or (II'), -L-W is optionally substituted aryl,
optionally substituted heteroaryl, optionally substituted carbocycyl, or optionally
substituted heterocyclyl.
[0094] In one embodiment of Formula (II) or (II'), R
1A and R
1B are independently selected from H, optionally substituted C1-C10 alkyl, optionally
substituted heterocyclyl, optionally substituted cycloalkyl, optionally substituted
cycloalkylalkyl, optionally substituted heterocyclylalkyl, optionally substituted
arylalkyl, or an optionally substituted 5-6 membered aryl ring containing up to two
heteroatoms as ring members. Preferably the amine group - NR
1AR
1B in compounds of Formulas (II) or (IIa) and II' or IIa' is not -NH
2, -NHMe, or -NMe
2.
[0095] Suitably, R
1A can be selected from H, C1-C4 alkyl, and C1-C6 acyl, where the alkyl and acyl are
optionally substituted. In many embodiments, R
1A is H; in other embodiments, it is sometimes Me, or an optionally substituted C1-C4
alkyl. In some embodiments, R
1A is an optionally substituted C1-C6 acyl group, particularly one that can readily
be cleaved under mild conditions, such as methoxyacetyl, hydroxyacetyl, or an alpha-amino
acyl group, which can act as pro-drugs for the compounds where R
1A is H.
[0096] Often, R
1A in this amine group -NR
1AR
1B is H, and R
1B is a substituted or unsubstituted group selected from C2-C8 alkyl, C3-C8 cycloalkyl,
aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocyclyl, and heterocyclylalkyl.
Typically, this aryl is phenyl; heteroaryl refers to a 5-6 membered ring containing
up to three heteroatoms selected from N, O and S as ring members; and heterocyclyl
refers to a 3-8 membered ring containing at least one heteroatom, and optionally two
heteroatoms for 6-8 membered rings, as ring members, where the heteroatoms are selected
from N, O and S; and the -alkyl- versions of these (arylalkyl, heteroarylalkyl, and
heterocyclylalkyl) typically comprise the specified cyclic group linked via an alkylene
linker such as (CH
2)
1-4 to the nitrogen atom of NR
1AR
1B. In certain embodiments, R
1B comprises at least one ring having 3-8 ring members.
[0097] Examples of suitable R
1B groups include ethyl, isopropyl, t-butyl, cyclopropyl, cyclobutyl, cyclopentyl, tetrahydrofuranyl,
piperidinyl, pyrrolidinyl, cyclopropylmethyl, cyclobutylmethyl, phenyl, and the like,
each of which can be unsubstituted or substituted with up to three substituents. Some
preferred embodiments include cyclopropyl, isopropyl, t-butyl, and cyclobutyl.
[0098] Specific examples of substituted R
1B groups include 2,2,2-trifluoroethyl, 2-methoxyethyl, 2-ethoxyethyl, methoxymethyl,
2-aminoethyl, 2-(N-morpholino)ethyl, 3-hydroxypropyl, 3-dimethylaminopropyl, 3-methoxypropyl,
2-hydroxyethyl, 2-hydroxypropyl, acetyl, benzoyl, phenyl substituted with -COOH, -COOMe,
-COOEt, -CONH
2, -CONMe
2, and
where Q represents a functional group such as -OH, -OR, -COOH, -COOR, -NH2, -NHR, -NR2, -CONH2, -CONHR, -CONR2, -SR, -S(O)R, -SO2R, -SONR2, -C(O)R, -NRC(O)R, -NRC(O)OR, -OC(O)OR, -OC(O)NR2,
wherein each R is independently H or an optionally substituted C1-C4 alkyl, group,
and two R present on the same functional group can be taken together to form a 5-8
membered optionally substituted ring, which can contain up to two heteroatoms selected
from N, O and S as ring members.
[0099] Where one or more substituents are present on these R, R
1A, or R
1B groups, often the substituents are selected from halo, OR", N(R")
2, S(O)
mR", COOR", CON(R")
2, CN, phenyl, pyridinyl, pyrrolidinyl, and the like, where each R" is independently
selected from H and C1-C4 alkyl, optionally substituted with one or more groups selected
from OH, C1-C4 alkoxy, halo, NH
2, C1-C4 alkylamine, and di(C1-C4)alkyl amine, and piperidine, pyrrolidine, morpholine,
or furan; and m is 0-2. Frequently, R
1B comprises at least one ring, such as a heterocyclyl or cycloalkyl or aryl ring. A
preferred embodiment of R
1B in the amine group -NR
1AR
1B in Formulas (II) and (II') is cyclopropyl, and a preferred embodiment of R
1A is H.
[0100] In compounds of Formula (II) and (II') and (IIa) or (IIa'), L can be a bond, - CR
7=CR
8-, -C≡C-, -NR
7-, -O-, -S(O)
n-, or (CR
7R
8)
n, or it can be -(CR
7R
8)
m-NR
7-, -(CR
7R
8)
m-O-, or -(CR
7R
8)
m-S(O)
n-. Typically, where L is attached to W at a heteroatom of W, L will be a bond or one
of the hydrocarbon linkers, such as (CR
7R
8)
m. However, embodiments of the invention include compounds wherein -L-W is a group
of the formula -NR
7-NR
7R
8 as well. Some examples of suitable groups for L include -CH=CH-, -C=C-, -NH-, NMe,
-O-, -S-, - S(O)
2-, and -CH
2NH-. Where L is attached to W at a heteroatom of W, L is often CH
2 or (CH
2)
2.
[0101] Figures 1 and 2 illustrate the improved selectivity found for compounds of Formula
II. Figure 1 depicts a prior art compound of Formula I that is a potent inhibitor
of CK2. In assays for inhibition of a panel of 108 kinases, this compound at a comcentration
of 1 micromolar is a potent inhibitor of many of the various kinases. By comparison,
Figure 2 shows a similar compound of Formula II, having a substituted amine group
as an additional substituent on the six-membered ring of the bicyclic core. This compound
is more potent as an inhibitor of CK2 than the similar-looking compound in Figure
1; it is less potent as an inhibitor of PIM1; and as the kinase panel assay shows,
it is less potent on many other kinases than the compound of Figure 1 is. Relatively
few kinases are inhibited by more than 80% with the amine-substituted compound of
Formula II, when compared to the proportion of kinase inhibitors showing similar levels
of inhibition by the non-aminated compound of Formula I. This improved selectivity
is observed for a wide array of amine substituent groups, as the data in Tables 1
and 2 and additional data throughout the application demonstrate.
[0102] Specific embodiments of the compounds of the invention include compounds of Formula
IIa and/or IIa':

wherein,
R2 is H, CH3 or CF3;
Z3 and Z4 each independently represent N or CR5, or CH;
where each R5 is independently selected from halo, -CN, -R, -OR, -S(O)nR, -COOR,-CONR2, and -NR2,
wherein each R is independently selected from H and optionally substituted C1-C4 alkyl,
or the two R groups, taken together with the nitrogen atom to which they are attached,
form an optionally substituted 5- or 6-membered heterocyclic ring which contains one
or more additional heteroatom selected from N, O and S as a ring member;
R4 is H, CH3 or CF3;
X is O, S or NH;
Y is O or S;
R1B is selected from H, optionally substituted C1-C10 alkyl, optionally substituted heteroalkyl,
optionally substituted heterocyclyl, optionally substituted cycloalkyl, optionally
substituted cycloalkylalkyl, optionally substituted heterocyclylalkyl, optionally
substituted arylalkyl, or an optionally substituted heteroaryl;
L is a bond, -NR7-, -O-, -S(O)n-, (CR7R8)m, or -(CR7R8)m-NR7-;
m is 1, 2, 3, or 4;
n is 0, 1, or 2;
W is selected from optionally substituted aryl, optionally substituted heteroaryl,
and -NR7R8,
where each R7 and R8 is independently selected from H, optionally substituted C1-C6 alkoxy, optionally
substituted C1-C6 alkylamino, optionally substituted C1-C6 dialkylamino, optionally
substituted heterocyclyl, optionally substituted C1-C10 alkyl, optionally substituted
C3-C8 cycloalkyl, optionally substituted C4-C10 cycloalkylalkyl, optionally substituted
aryl, optionally substituted arylalkyl, optionally substituted heteroaryl, and optionally
substituted heteroarylalkyl;
and R7 and R8, taken together on a single carbon atom or on adjacent connected carbon atoms of
(CR7R8)m whether alone or as part of another group, form a 3- to 8-membered ring that contains
one or more heteroatoms as ring members;
or R7 and R8, taken together with the nitrogen atom to which they are attached, form an optionally
substituted 5- to 10-membered heterocyclic or heteroaryl ring system that optionally
contains an additional heteroatom selected from N, O and S as a ring member; and
provided that no more than one of or R7 and R8 in -NR7R8 is selected from the group consisting of alkoxy, alkylamino, dialkylamino and heterocyclyl.
[0103] In the foregoing compounds of Formula (IIa) or (IIa'), R
2 and R
4 are selected from H, CH
3 and CF
3. In some embodiments R
2 is H. In some embodiments, R
4 is H.
[0104] In the foregoing compounds of Formula (IIa) or (IIa'), Y is O or S. In preferred
embodiments, Y is O.
[0105] In the foregoing compounds of Formula (IIa) or (IIa'), X can be S, O or NH. Frequently,
X is NH or S. In certain embodiments, X is NH.
[0106] In the foregoing compounds of Formula (IIa) or (IIa'), Z
3 and Z
4 are often selected from N and CH. In some embodiments, one of these ring members
is N and the other is CH. In alternative embodiments, both Z
3 and Z
4 are N. In still other embodiments, Z
3 and Z
4 are both CH.
[0107] In certain compounds of Formula IIa, Z
3 can be N while Z
4 is CH; or Z
3 can be N while Z
4 is also N. In certain compounds of Formula IIa', Z
3 can be CH while Z
4 is N; alternatively, Z
3 can be N while Z
4 is N or CH.
[0108] In the foregoing compounds of Formula (IIa) or (IIa'), R
3, when present, can be H or optionally substituted alkyl. Often, R
3 is H.
[0109] Z can be O or S; in preferred embodiments, Z is O.
[0110] When present, m is frequently 1 or 2.
[0111] In these compounds of Formula IIa and/or IIa', R
2 and R
4 are frequently both H.
[0112] In the foregoing compounds of Formula IIa and/or IIa', R
1B can be optionally substituted C1-C10 alkyl, optionally substituted heterocyclyl,
optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl, optionally
substituted heterocyclylalkyl, optionally substituted arylalkyl, or an optionally
substituted 5-6 membered aryl ring containing up to two heteroatoms as ring members.
In some embodiments, R
1B is a C3-C6 cycloalkyl, or a 3-6 membered heterocyclic group such as piperidine or
a C1-C3 alkyl group substituted with one of these rings, and it is optionally substituted.
Specific embodiments of R
1B include cyclopropyl, cyclopropylmethyl, 4-piperidinyl, and substituted 4-piperidinyl,
e.g. 4-piperidinyl substituted with an acyl group, such as acetyl, at N-1. Other embodiments
include optionally substituted phenyl.
[0113] In the foregoing compounds of Formula (IIa) or (IIa'), -L-M is -NHR
7, -OR
7, or-S(O)
nR
7; n is 0, 1, or 2; and R
7 is optionally substituted C1-C10 alkyl, optionally substituted heteroalkyl, optionally
substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl,
optionally substituted heteroarylalkyl, optionally substituted carbocyclyl, optionally
substituted heterocyclyl, optionally substituted carbocyclylalkyl, or optionally substituted
heterocyclylalkyl.
[0114] In the foregoing compounds of Formula (IIa) or (IIa'), -L-M is -NR
7R
8; and R
7 and R
8, taken together with the nitrogen atom to which they are attached, form an optionally
substituted heterocyclyl which optionally contains one or more additional heteroatom
as ring members.
[0115] In the foregoing compounds of Formula (IIa) or (IIa'), -L-M is optionally substituted
aryl, optionally substituted heteroaryl, optionally substituted carbocycyl, or optionally
substituted heterocyclyl.
[0116] In the foregoing compounds of Formula IIa and/or IIa', L is typically a bond or NH.
When L is NH, W can be an optionally substituted group selected from phenyl, phenylalkyl,
heterocyclyl, cycloalkyl and cycloalkylalkyl.
[0117] In the foregoing compounds of Formula IIa and/or IIa', W is frequently an optionally
substituted phenyl, arylalkyl, cycloalkyl, heteroaryl, cycloalkylalkyl, or heterocyclic
group. Specific examples include optionally substituted phenyl; optionally substituted
phenylmethyl; optionally substituted 1-phenylethyl; cyclopropylmethyl; 1-cyclopropylethyl;
piperidinyl; and morpholinyl. Some preferred substituents for the pheyl groups of
W include halo, CN, Me, CF
3, OMe, OCF
3, and heteroaryl groups such as pyrazole or pyrrole or imidazole.
[0118] When L is a bond, W is frequently an optionally substituted aryl, heteroaryl or heterocyclyl
group. Surprisingly high flexibility has been demonstrated among the groups that can
be represented by W in Formula II, II', and (IIa) or (IIa'). Aryl and heteroaryl groups
are suitable for W, and can be unsubstituted or substituted. Examples of suitable
aromatic groups include phenyl, pyridinyl, pyrimidinyl, thienyl (thiophene ring),
furanyl, oxazole, isoxazole, thiazole, isothiazole, oxadiazole, thiadiazole, triazole,
and the like, as well as indole, benzimidazole, benzofuran, benzopyrazole, imidazole,
pyrrole, pyrazole, and the like. Note that the latter group (indole, benzimidazole,
benzofuran, benzopyrazole, imidazole, pyrrole, pyrazole) contain a 5-membered nitrogen
heterocycle, and can be linked to L through either C or N as a result. In some embodiments,
W represents one of these aromatic groups that comprises a 5-membered ring, and W
is attached via N of the 5-membered ring to L, and L is a bond so that W is effectively
attached directly to the ring containing Z
3 and Z
4. Suitable substituents for all of these aryl or heteroaryl groups include those described
herein as suitable for such aromatic groups.
[0119] When W is an aromatic group, L is sometimes a bond, NH, or O. A particular embodiment
of interest is a compound of Formula II, II', (IIa) or (IIa'), wherein L is a bond
or NH, and W is an optionally substituted phenyl or optionally substituted thienyl
ring. In embodiments where L is a bond, it is often desirable for the position of
each ring atom of the aryl ring that is adjacent to the attachment point for L to
be unsubstituted (i.e., any adjacent carbon(s) would be CH), so the optional substituents
on W in such compounds are often, when present, located at positions 3, 4, or 5 of
a phenyl ring (assuming position 1 attaches to L), or to positions 4 or 5 of a thienyl
ring when L attaches to position 2, and at position 5 of the thienyl group when L
attaches at position 3. Examples of these W groups include:

where each A represents the presence of an optional substituent (or more than one
where the ring valence permits more) on a carbon not having an explicit H attached.
[0120] Where W is an aromatic group, a wide array of substituents are well tolerated and
provide high levels of kinase activity. Suitable substituents include those described
herein as suitable for placement on aromatic groups in general. Some of the suitable
substituents for these aromatic group W's include halo (especially F or Cl), alkyl,
(
e.g., C1-C4 alkyl, such as methyl, ethyl, isopropyl or cyclopropyl); alkoxy (especially
C1-C4 alkyloxy); haloalkyl (
e.g., CF
3, -CH
2CF
3); haloalkoxy (
e.g. -OCF
3, -OCF
2H, OCH
2CF
3, and the like); CN, -OH, alkynyl (
e.
g., -CCH, CCMe, and the like); heterocyclylmethyl (
e.g., N-piperidinylmethyl. N-pyrrolidinylmethyl, N-morpholinylmethyl, etc.); hydroxymethyl,
aminomethyl, dimethylaminomethyl, methylaminomethyl; substituted C1-C4 alkoxy such
as methoxyethoxy, ethoxymethoxy, trifluoroethoxy, 2-(N-morpholino)ethoxy, 2-(N-pyrrolidinyl)ethoxy,
2-(piperidinyl)ethoxy, and the like; acyl groups of the formula -C(O)-X, where X represents
-OR, -NR
2, or -R, where each R is independently selected from H or an optionally substituted
member selected from C1-C4 alkyl, 3-8 membered cycloalkyl or heterocyclyl, and 5-6
membered aryl or heteroaryl containing up to 3 heteroatoms'selected from N, O and
S as ring members, and where two R on one group (
e.g., two R's of -NR
2) can be taken together to form an optionally substituted 5-8 membered ring containing
up to two heteroatoms selected from N, O and S as ring members; heterocyclic groups
such as morpholine, tetrahydrofuran, piperidine, pyrrolidine, 4-Me-N-piperazinyl,
N-piperazinyl, 4-acetyl-N-piperazinyl, and the like.
[0121] Commonly, an aromatic group W will have 1-2 substituents, or it will be unsubstituted;
and commonly the substituents, when present, are positioned as described above, so
that the ring carbon(s) adjacent to where L is attached are unsubstituted (CH). When
L is other than a bond, the substituents on W can be at any position, and often will
be at the positions ortho and/or para to the point of attachment of W to L.
[0122] Alternatively, W can be a heterocyclic group such as piperidinyl, morpholinyl, pyrrolidinyl,
tetrahydrofuranyl, tetrahydropyranyl, thiomorpholinyl, piperazinyl, thiolanyl, and
the like, each of which can be unsubstituted or substituted with up to four substituents.
Suitable substituents for these groups include those described herein as suitable
for heterocyclic groups. Note that even when L is NR or NH, W can be a heterocyclic
groups such as 1-piperidinyl or 4-morpholinyl where L links to a heteroatom (N) of
the heterocyclic group as well as at C of the heterocyclic group.
[0123] Where L is NH, W can also be arylalkyl, or cycloalkylalkyl or heterocyclylalkyl,
and the alkyl portion of W can be e.g. C1-C4. Where L comprises an alkyl portion,
it can be a straight chain (e.g., ethylene, propylene, butylene), or it can be a substituted
alkylene chain, resulting in formation of a potentially chiral carbon linker. Where
L is a chiral group of this type, e.g. when L is -CH(R)- or -CH
2-CH(R)- where R is not H (e.g., R is Methyl or ethyl, L can be either in an
R configuration or an
S configuration, where those terms are used in their conventional stereochemical sense,
or it can be present as a mixture of isomers, including a racemic mixture. In some
embodiments, such a chiral center present in L will be in the
S configuration. In other embodiments, it can be in the
R configuration.
[0124] Alternatively, W can be a group of the formula or -NR
7R
8, -OR
7, S(O)
nR
7, CONR
7R
8, or CR
7R
8R
9, where each R
7 and R
8 and R
9 is independently selected from H, optionally substituted C1-C10 alkyl, optionally
substituted aryl, optionally substituted arylalkyl, optionally substituted heteroaryl,
and optionally substituted heteroarylalkyl; or R
7 and R
8 taken together with the N of -NR
7R
8 can form an optionally substituted 5-10 membered heterocyclic or heteroaromatic ring
system that optionally contains an additional heteroatom selected from N, O and S
as a ring member.
[0125] In embodiments where W is -NR
7R
8, L is frequently a bond, and R
7 and R
8 taken together with the N of NR
7R
8 can form an optionally substituted 5-10 membered heterocyclic or heteroaromatic ring
system that optionally contains an additional heteroatom selected from N, O and S
as a ring member. Suitable such rings include
e.
g., pyrrolidinyl, piperidinyl, piperazinyl, thiomorpholinyl, diazepinyl, and morpholinyl,
each of which can be substituted to the extent substitution forms relatively water-stable
structures. Suitable substituents include, for example, oxo (=O), C1-C4 alkyl, -OH,
-CN, halo (especially F or Cl), COOR, CONR
2, SR, -S(O)R, -SO
2R, -NR
2, hydroxyalkyl, -OR, methoxyalkyl (
e.g., methoxymethyl), where each R is independently H or optionally substituted C1-C4
alkyl, and where two R on one group can be taken together to form an optionally substituted
5-8 membered ring containing up to two heteroatoms selected from N, O and S as ring
members.
[0126] In some embodiments of the compounds of Formula (II) and (II') and (IIa) or (IIa'),-L-W
is a group of the formula -NH-Ar, where Ar represents an optionally substituted aromatic
group. Suitable aromatic rings for this group include phenyl, naphthyl, pyridinyl,
pyrimidinyl, thienyl (thiophene ring), furanyl, indolyl, benzofuranyl, benzothienyl,
benzopyrazolyl, benzimidazolyl, benzoxazole and benzothiazole. Suitable substituents
for these aryl or heteroaryl groups include those described herein as suitable for
such aromatic groups.
[0127] In some embodiments, W is an optionally substituted cycloalkyl group, typically containing
3-8 ring atoms in a monocyclic structure, or 8-10 ring atoms in a bicyclic structure.
Examples include 1,2,3,4-tetrahydronaphth-1-yl, cyclopropyl, cyclobutyl, cyclopentyl,
cyclohexyl and decalin. These groups are optionally substituted as described herein;
in some embodiments, the cycloalkyl ring will be substituted with one or more (
e.g., up to three) groups selected from halo, hydroxy, oxo (=O), COOR, CONR
2, SR, -S(O)R, -SO
2R, -NR
2, hydroxyalkyl, -OR, methoxyalkyl (
e.
g., methoxymethyl), C1-C4 alkyl, where each R is independently H or optionally substituted
C1-C4 alkyl, and where two R on one group can be taken together to form an optionally
substituted 5-8 membered ring containing up to two heteroatoms selected from N, O
and S as ring members.
[0128] Particular embodiments of the compounds of the invention include thiophene-containing
compounds of Formula (II-Th) and (II-Th'):
where RTh is selected from H, halo, optionally substituted C1-C6 alkyl, CN, S(O)0-2R,-SO2NR2, COOR, CONR2, and C(O)R,
where each R is independently H, halo, CN, or an optionally substituted member selected
from the group consisting of C1-C6 alkyl, C1-C6 alkoxy, C1-C6 alkylamino, di(C1-C6)alkylamino,
C3-C8 cycloalkyl, C4-C10 cycloalkylalkyl, C5-C8 heterocyclyl, C6-C10 heterocyclylalkyl,
aryl, arylalkyl, C5-C6 heteroalkyl, and C6-C10 heteroalkylalkyl;
and two R on the same atom or adjacent connected atoms can form an optionally substituted
heterocyclic ring that can contain an additional heteroatom selected from N, O and
S as a ring member:
and other structural features are as defined for Formula IIa above.
[0129] The thienyl (thiophene) ring in Formulas II-Th and II-Th' can be attached to the
bicyclic core at either position 2 or position 3 of the thiophene ring, when the position
substituted with R
Th is defined as position 5, and the ring sulfur is position 1. In some embodiments,
connection is at position 2 of the thienyl group, and in alternative embodiments,
connection is at position 3 of the thienyl group.
[0130] In these compounds of Formulas II-Th and II-Th', R
2 and R
4 are frequently both H.
[0131] In the foregoing compounds of Formulas II-Th and II-Th', X is preferably NH.
[0132] In the foregoing compounds of Formulas II-Th and II-Th', Y is frequently O.
[0133] In the foregoing compounds of Formulas II-Th and II-Th', Z
3 is often N.
[0134] In the foregoing compounds of Formulas II-Th and II-Th', Z
4 can be CH or N.
[0135] In the foregoing compounds of Formulas II-Th and II-Th', R
1B can be optionally substituted C1-C10 alkyl, optionally substituted heterocyclyl,
optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl, optionally
substituted heterocyclylalkyl, optionally substituted arylalkyl, or an optionally
substituted 5-6 membered aryl ring containing up to two heteroatoms as ring members.
In some embodiments, R
1B is a C3-C6 cycloalkyl or a 3-6 membered heterocyclic group such as piperidine or
a C1-C3 alkyl, group substituted with one of these rings, and it is optionally substituted.
Specific embodiments of R
1B include cyclopropyl, cyclopropylmethyl, 4-piperidinyl, and substituted 4-piperidinyl,
e.g. 4-piperidinyl substituted with an acyl group, such as acetyl, at N-1. Other embodiments
include optionally substituted phenyl.
[0136] In these compounds, R
TH can be halo (F, Cl, Br), CF
3, CN, C1-C6 alkyl, C1-C3 alkyl, substituted with heterocyclyl or heterocyclylamino,
COOR, or COONR
2.
[0137] In one emobidment of the present invention, the compounds of Formula (IIa) or (IIa')
have structural Formula (IIb) or (IIb'):

wherein
R2 and R4 are independently H, CH3 or CF3;
Z4 is N or CH;
-L-M is -NR8AR7, -NHR7, -OR7, or S(O)nR7;
n is 0, 1, or 2; and
R7 is optionally substituted C1-C10 alkyl, optionally substituted heteroalkyl, optionally
substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl,
optionally substituted heteroarylalkyl, optionally substituted carbocyclyl, optionally
substituted heterocyclyl, optionally substituted carbocyclylalkyl, or optionally substituted
heterocyclylalkyl, optionally substituted aryl, optionally substituted heteroaryl,
optionally substituted carbocycyl, or optionally substituted heterocyclyl; or
R7 and R8A, taken together with the nitrogen atom to which they are attached, form an optionally
substituted heterocyclyl which optionally contains one or more additional heteroatom
as ring members.
[0138] In one emobidment of the present invention, the compounds of Formula (II) have structural
Formula (1Ic):

wherein,
X is O, S, or NR2;
R3 is -(CH2)-XC;
XC is hydroxyl or a group having structural formula (a), (b), (c), or (d):


L1 and L2 are each independently a covalent bond, -O-, or -NR3a-;
R1a and R2a are each independently hydrogen, alkyl, heteroalkyl, heteroaryl, heterocyclyl, alkenyl,
alkynyl, arylalkyl, heteroarylalkyl, heterocyclylalkyl, -alkylene-C(O)-O-R4a, or -alkylene-O-C(O)-O-R4a; and
R3a and R4a are each independently hydrogen, alkyl, heteroalkyl, cyclylalkyl, heterocyclyl, aryl,
heteroaryl, alkenyl, alkynyl, arylalkyl, heterocyclylalkyl, or heteroarylalkyl;
L3 is a covalent bond or alkylene;
Y is OR5a, NR5aR6a, or C(O)OR7a, provided that when Y is C(O)OR7a, then L3 is not a covalent bond; and
R5a, R6a, and R7a are each independently hydrogen, alkyl, arylalkyl, aryl, heteroalkyl, alkylheteroaryl,
heterocyclyl, or heteroaryl; or alternatively, R5a and R6a, taken together with the nitrogen atom to which they are attached, form a hetercyclyl
ring optionally containing one o r more additional heteroatom independently selected
from N, O, and S.
[0139] In one embodiment of Formula (IIc), X is NR
2; R
3 is -(CH
2)-X
C; and X
C is hydroxyl or a group having structural formula (b):

[0140] In one embodiment of Formula (IIc), R
2 and R
4 are hydrogen.
[0141] In one embodiment of Formula (IIc), R
1B is an optionally substituted C1-C10 alkyl, cycloalkyl, or cycloalkylalkyl,
[0142] In one embodiment of Formula (IIc), -L-W is OR
7 or -NR
7R
8.
[0143] In one embodiment of Formula (IIc), R
7 is optionally substituted aryl or optionally substituted heteroaryl; and R
8 is H.
[0144] In one embodiment of Formula (IIc), R
8 is optionally substituted phenyl.
[0145] In one embodiment of Formula (IIc), L
3 is a covalent bond; and Y is OR
5a or NR
5aR
6a.
[0146] The compounds of the invention also include those enriched in isotopes of the atoms
involved in the structures described herein. For example, the compounds as described
are intended to include versions wherein one or more H atoms is preferentially enriched
in a heavier hydrogen isotope (deuterium or tritium). In particular, where any of
the foregoing compounds contains a methyl group (Me), an enriched methyl group containing
deuterium at levels far above natural abundance can be used. For example, -CH
3 could be replaced by -CH
2D or-CHD
2 or -CD
3, where each D represents deuterium present in place of
1H, and indicates that D is present instead of
1H in at least about 50% of the molecules of a sample of the compound. Of particular
interest are compounds comprising -N(R)Me or -NMe
2, where Me can be present as CD
3. This variation of the compounds described herein is particularly interesting because
the presence of CD
3 in place of CH
3 can have a significant effect on rates of metabolism of an N-methyl group, thus a
compound comprising CD
3 can have improved pharmacokinetic properties over a non-enriched compound. Accordingly,
the alkyl groups described herein are intended to include ones enriched in deuterium,
and compounds containing a methyl group on N are specifically considered to include
a deuterium-enriched methyl group on N.
[0147] The compounds of the invention often have ionizable groups so as to be capable of
preparation as salts. In that case, wherever reference is made to the compound, it
is understood in the art that a pharmaceutically acceptable salt may also be used.
These salts may be acid addition salts involving inorganic or organic acids or the
salts may, in the case of acidic forms of the compounds of the invention be prepared
from inorganic or organic bases. Frequently, the compounds are prepared or used as
pharmaceutically acceptable salts prepared as addition products of pharmaceutically
acceptable acids or bases. Suitable pharmaceutically acceptable acids and bases are
well-known in the art, such as hydrochloric, sulphuric, hydrobromic, acetic, lactic,
citric, or tartaric acids for forming acid addition salts, and potassium hydroxide,
sodium hydroxide, ammonium hydroxide, caffeine and various amines for forming basic
salts. Methods for preparation of the appropriate salts are well-established in the
art. In some cases, the compounds may contain both an acidic and a basic functional
group, in which case they may have two ionized groups and yet have no net charge.
Utilities of the Compounds:
[0148] In another aspect, the invention provides a pharmaceutical composition comprising
any of the compounds of the invention as above-described, admixed with a pharmaceutically
acceptable excipient.
[0149] The compounds of the invention are useful as medicaments, and are useful for the
manufacture of medicaments, including medicaments to treat conditions disclosed herein,
such as cancers, inflammatory conditions, infections, pain, and immunological disorders.
[0150] The terms "treat" and "treating" as used herein refer to ameliorating, alleviating,
lessening, and removing symptoms of a disease or condition. A candidate molecule or
compound described herein may be in a therapeutically effective amount in a formulation
or medicament, which is an amount that can lead to a biological effect, such as apoptosis
of certain cells (
e.g., cancer cells), reduction of proliferation of certain cells, or lead to ameliorating,
alleviating, lessening, or removing symptoms of a disease or condition, for example.
The terms also can refer to reducing or stopping a cell proliferation rate (
e.g., slowing or halting tumor growth) or reducing the number of proliferating cancer
cells (
e.g., removing part or all of a tumor).
[0151] These terms also are applicable to reducing a titre of a microorganism in a system
(
i.e., cell, tissue, or subject) infected with a microorganism, reducing the rate of microbial
propagation, reducing the number of symptoms or an effect of a symptom associated
with the microbial infection, and/or removing detectable amounts of the microbe from
the system. Examples of microorganisms include but are not limited to virus, bacterium
and fungus.
[0152] The compounds of the invention have activities to modulate protein kinases, in particular
CK2 activity and/or Pim activity. In some embodiments, the compounds of the invention
specifically inhibit the activity of CK2, but not Pim, e.g., more than 100, 90, 80,
70, 60, 50, 40, 30, 20, or 10 fold difference between CK2 inhibition vs. Pim inhibition.
In some embodiments, the compounds of the invention specifically inhibit the acitivity
of Pim, but not Ck2, e.g., more than 100, 90, 80, 70, 60, 50, 40, 30, 20, or 10 fold
difference between Pim inhibition vs. CK2 inhibition. In some embodiments, the compounds
of the invention inhibit the activity of CK2 as well as Pim.
[0153] The compounds of the invention can be used to modulate the activity of CK2 and/or
Prim, e.g., inhibit the activity of CK2 and/or Pim in a cell, e.g., in vivo or in
vitro. In some embodiments, compounds of the invention can be used to modulate the
activity of CK2, e.g., inhibit the activity of CK2 without substantially interferring
or changing the activity of Pim. In some embodiments, compounds of the invention can
be used to modulate the activity of Pim, e.g., inhibit the activity of Pim without
substantially interferring or changing the activity of CK2. In some embodiments, compounds
of the invention can be used to modulate the activity of CK2 and Pim, e.g., inhibit
the activity of CK2 and Pim.
[0154] The compounds of the invention are thus useful to treat infections by certain pathogens,
including protozoans and viruses. The compounds may thus be used in methods for treating
protozoal disorders such as protozoan parasitosis, including infection by parasitic
protozoa responsible for neurological disorders such as schizophrenia, paranoia, and
encephalitis in immunocompromised patients, as well as Chagas' disease. The compounds
may also be used to treat various viral diseases, including human immunodeficiency
virus type 1 (HIV-1), human papilloma viruses (HPVs), herpes simplex virus (HSV),
Epstein-Barr virus (EBV), human cytomegalovirus, hepatitis C and B viruses, influenza
virus, Borna disease virus, adenovirus, coxsackievirus, coronavirus and varicella
zoster virus. The methods for treating these disorders comprise administering to a
subject in need thereof an effective amount of a compound of Formula II or Formula
II'.
[0155] As used herein, the term "apoptosis" refers to an intrinsic cell self-destruction
or suicide program. In response to a triggering stimulus, cells undergo a cascade
of events including cell shrinkage, blebbing of cell membranes and chromatic condensation
and fragmentation. These events culminate in cell conversion to clusters of membrane-bound
particles (apoptotic bodies), which are thereafter engulfed by macrophages.
[0156] Compounds of the invention as described above may also be used in methods for identifying
a candidate molecule that interacts with a CK2. Such methods comprise contacting a
composition containing a CK2 protein and a compound of the invention described herein
with a candidate molecule and determining whether the amount of the compound of the
invention described herein that interacts with the protein is modulated, whereby a
candidate molecule that modulates the amount of the molecule described herein that
interacts with the protein is identified as a candidate molecule that interacts with
the protein.
[0157] Compounds of the invention as described above are also useful for modulating certain
protein kinase activities. Protein kinases catalyze the transfer of a gamma phosphate
from adenosine triphosphate to a serine or threonine amino acid (serine/threonine
protein kinase), tyrosine amino acid (tyrosine protein kinase), tyrosine, serine or
threonine (dual specificity protein kinase) or histidine amino acid (histidine protein
kinase) in a peptide or protein substrate. A system comprising a protein kinase protein
may thus be contacted with a compound of the invention as described herein in an amount
effective for modulating (
e.g., inhibiting) the activity of the protein kinase. In some embodiments, the activity
of the protein kinase is the catalytic activity of the protein (
e.g., catalyzing the transfer of a gamma phosphate from adenosine triphosphate to a peptide
or protein substrate). In certain embodiments, methods for identifying a candidate
molecule that interacts with a protein kinase comprise: contacting a composition containing
a protein kinase and a compound-of the invention as described herein with a candidate
molecule under conditions in which the compound and the protein kinase interact, and
described herein that interacts with the protein kinase is modulated relative to a
control interaction between the compound and the protein kinase without the candidate
molecule, whereby a candidate molecule that modulates the amount of the compound interacting
with the protein kinase relative to the control interaction is identified as a candidate
molecule that interacts with the protein kinase. Systems in such embodiments can be
a cell-free system or a system comprising cells (
e.g., in vitro). The protein kinase, the compound or the molecule in some embodiments is in association
with a solid phase. In certain embodiments, the interaction between the compound and
the protein kinase is detected via a detectable label, where in some embodiments the
protein kinase comprises a detectable label and in certain embodiments the compound
comprises a detectable label. The interaction between the compound and the protein
kinase sometimes is detected without a detectable label.
[0158] Provided also are compositions of matter comprising a protein kinase and a compound
of the invention as described herein. In some embodiments, the protein kinase in the
composition is a serine-threonine protein kinase. In some embodiments, the protein
kinase in the composition is, or contains a subunit (
e.g., catalytic subunit, SH2 domain, SH3 domain) of, CK2. In certain embodiments the
composition is cell free and sometimes the protein kinase is a recombinant protein.
[0159] The protein kinase can be from any source, such as cells from a mammal, ape or human,
for example. Examples of serine-threonine protein kinases that can be inhibited, or
may potentially be inhibited, by compounds disclosed herein include without limitation
human versions of CK2, or CK2α2. A serine-threonine protein kinase sometimes is a
member of a subfamily containing one or more of the following amino acids at positions
corresponding to those listed in human CK2: leucine at position 45, methionine at
position 163 and isoleucine at position 174. Nucleotide and amino acid sequences for
protein kinases and reagents are publicly available (
e.g., World Wide Web URLs www.ncbi.nlm.nih.gov/sites/entrez/ and www.Invitrogen.com,
each last visited December 2, 2009).
[0160] Compounds of the invention may also be used in methods for treating a condition related
to aberrant cell proliferation. For example, methods of treating a cell proliferative
condition in a subject comprise administering a compound of the invention as described
herein to a subject in need thereof in an amount effective to treat the cell proliferative
condition. The subject may be a research animal (
e.g., rodent, dog, cat, monkey), optionally containing a tumor such as a xenograft tumor
(
e.g., human tumor), for example, or may be a human. A cell proliferative condition sometimes
is a tumor, e.g., solid or circulating tumor or non-tumor cancer, including but not
limited to, cancers of the colorectum, breast, lung, liver, pancreas, lymph node,
colon, prostate, brain, head and neck, skin, liver, kidney, blood and heart (
e.g., leukemia, lymphoma, carcinoma).
[0161] Compounds and compositions of the invention may be used alone or in combination with
anticancer or other agents, such as a palliative agents, that are typically administered
to a patient being treated for cancer, as further described herein.
[0162] Compounds of the invention are further used in methods for treating a condition related
to inflammation or pain. For example, a method for treating pain in a subject comprises
administering a compound of the invention described herein to a subject in need thereof
in an amount effective to treat the pain. A method of treating inflammation in a subject
comprises administering a compound of the invention described herein to a subject
in need thereof in an amount effective to treat the inflammation. The subject may
be a research animal (
e.g., rodent, dog, cat, monkey), for example, or may be a human. Conditions associated
with inflammation and pain include without limitation acid reflux, heartburn, acne,
allergies and allergen sensitivities, Alzheimer's disease, asthma, atherosclerosis,
bronchitis, carditis, celiac disease, chronic pain, Crohn's disease, cirrhosis, colitis,
dementia, dermatitis, diabetes, dry eyes, edema, emphysema, eczema, fibromyalgia,
gastroenteritis, gingivitis, heart disease, hepatitis, high blood pressure, insulin
resistance, interstitial cystitis, joint pain/arthritis/rheumatoid arthritis, metabolic
syndrome (syndrome X), myositis, nephritis, obesity, osteopenia, glomerulonephritis
(GN), juvenile cystic kidney disease, and type I nephronophthisis (NPHP), osteoporosis,
-Parkinson's disease, Guam-Parkinson dementia, supranuclear palsy, Kuf's disease,
and Pick's disease, as well as memory impairment, brain ischemia, and schizophrenia,
periodontal disease, polyarteritis, polychondritis, psoriasis, scleroderma, sinusitis,
Sjögren's syndrome, spastic colon, systemic candidiasis,
tendonitis, urinary tract infections, vaginitis and inflammatory cancer (
e.g., inflammatory breast cancer).
[0163] Methods for determining and monitoring effects of compounds herein on pain or inflammation
are known. For example, formalin-stimulated pain behaviors in research animals can
be monitored after administration of a compound described herein to assess treatment
of pain (
e.g.,
Li et al., Pain 115(1-2): 182-90 (2005)). Also, modulation of pro-inflammatory molecules (
e.g., IL-8, GRO-alpha, MCP-1, TNFalpha and iNOS) can be monitored after administration
of a compound described herein to assess treatment of inflammation (
e.g.,
Parhar et al., Int J Colorectal Dis. 22(6): 601-9 (2006)), for example. Thus, methods for determining whether a compound of the invention
as described herein reduces inflammation or pain comprises contacting a system with
said compound in in an amount effective for modulating (
e.g., inhibiting) the activity of a pain signal or inflammation signal.
[0164] Methods for identifying a compound that reduces inflammation or pain comprise: contacting
a system with a compound of Formula II or Formula II'; and detecting a pain signal
or inflammation signal, whereby a compound that modulates the pain signal relative
to a control molecule is identified as a compound that reduces inflammation of pain.
Non-limiting examples of pain signals are formalin-stimulated pain behaviors and examples
of inflammation signals include without limitation a level of a pro-inflammatory molecule.
Compounds of the invention may thus be used in methods for modulating angiogenesis
in a subject, and methods for treating a condition associated with aberrant angiogenesis
in a subject.
[0165] CK2 has also been shown to play a role in the pathogenesis of atherosclerosis, and
may prevent atherogenesis by maintaining laminar shear stress flow. CK2 plays a role
in vascularization, and has been shown to mediate the hypoxia-induced activation of
histone deacetylases (HDACs). CK2 is also involved in diseases relating to skeletal
muscle and bone tissue, including,
e.g., cardiomyocyte hypertrophy, heart failure, impaired insulin signaling and insulin
resistance, hypophosphatemia and inadequate bone matrix mineralization.
[0166] Thus in one aspect, compounds of the invention may be used to treat each of these
conditions. Said treatment comprises administering to a subject in need thereof an
effect amount of a CK2 inhibitor, such as a compound of Formula II or Formula II'
as described herein.
[0167] Compounds of the invention may also be used in methods for modulating an immune response
in a subject, and methods for treating a condition associated with an aberrant immune
response in a subject. Thus, a method for determining whether a compound of the invention
as described herein modulates an immune response comprises contacting a system with
a compound of the invention as described herein in an amount effective for modulating
(
e.g., inhibiting) an immune response or a signal associated with an immune response. Signals
associated with immunomodulatory activity include,
e.
g., stimulation of T-cell proliferation, suppression or induction of cytokines, including,
e.
g., interleukins, interferon-γ and TNF. Methods of assessing immunomodulatory activity
are known in the art.
[0168] Methods for treating a condition associated with an aberrant immune response in a
subject comprise administering a compound of the invention as described herein to
a subject in need thereof in an amount effective to treat the condition. Conditions
characterized by an aberrant immune response include without limitation, organ transplant
rejection, asthma, autoimmune disorders, including rheumatoid arthritis, multiple
sclerosis, myasthenia gravis, systemic lupus erythematosus, scleroderma, polymyositis,
mixed connective tissue disease (MCTD), Crohn's disease, and ulcerative colitis. In
certain embodiments, an immune response may be modulated by administering a compound
herein in combination with a molecule that modulates (
e.g., inhibits) the biological activity of an mTOR pathway member or member of a related
pathway (
e.g., mTOR, PI3 kinase, AKT). In certain embodiments the molecule that modulates the
biological activity of an mTOR pathway member or member of a related pathway is rapamycin.
In certain embodiments, a compound of the invention described herein may be provided
in a composition in combination with a molecule that modulates the biological activity
of an mTOR pathway member or member of a related pathway, such as rapamycin.
Compositions and Routes of Administration
[0169] In another aspect, the invention provides pharmaceutical compositions (i.e., formulations).
The pharmaceutical compositions can comprise a compound of any of Formulae (II), (II'),
(IIa), (IIa'), (IIb), (IIb'), (II-Th), and (II-Th'), as described herein which is
admixed with at least one pharmaceutically acceptable excipient or carrier. Frequently,
the composition comprises at least two pharmaceutically acceptable excipients or carriers.
[0170] While the compositions of the present invention will typically be used in therapy
for human patients, they may also be used in veterinary medicine to treat similar
or identical diseases. The compositions may, for example, be used to treat mammals,
including, but not limited to, primates and domesticated mammals. The compositions
may, for example be used to treat herbivores. The compositions of the present invention
include geometric and optical isomers of one or more of the drugs, wherein each drug
is a racemic mixture of isomers or one or more purified isomers.
[0171] Pharmaceutical compositions suitable for use in the present invention include compositions
wherein the active ingredients are contained in an effective amount to achieve the
intended purpose. Determination of the effective amounts is well within the capability
of those skilled in the art, especially in light of the detailed disclosure provided
herein.
[0172] The compounds of the present invention may exist as pharmaceutically acceptable salts.
The present invention includes such salts. The term "pharmaceutically acceptable salts"
is meant to include salts of active compounds which are prepared with relatively nontoxic
acids or bases, depending on the particular substituent moieties found on the compounds
described herein. When compounds of the present invention contain relatively acidic
functionalities, base addition salts can be obtained by contacting the neutral form
of such compounds with a sufficient amount of the desired base, either neat or in
a suitable inert solvent. Included are base addition salts such as sodium, potassium,
calcium, ammonium, organic amino, or magnesium salt, or a similar salt. When compounds
of the present invention contain relatively basic functionalities, acid addition salts
can be obtained by contacting the neutral form of such compounds with a sufficient
amount of the desired acid, either neat or in a suitable inert solvent. Examples of
acceptable acid addition salts include those derived from inorganic acids like hydrochloric,
hydrobromic, nitric, carbonic, monohydrogencarbonic, phosphoric, monohydrogenphosphoric,
dihydrogenphosphoric, sulfuric, monohydrogensulfuric, hydriodic, or phosphorous acids,
as well as the salts derived from relatively nontoxic organic acids, for example,
acetic, propionic, isobutyric, maleic, malonic, benzoic, succinic, suberic, fumaric,
lactic, mandelic, phthalic, benzenesulfonic, p-tolylsulfonic, citric, tartaric and
methanesulfonic. Also included are salts of amino acids such as arginate, and salts
of organic acids like glucuronic or galactunoric (see, for example,
Berge et al., "Pharmaceutical Salts", Journal of Pharmaceutical Science, 1977, 66,
1-19). Certain specific compounds of the present invention contain both basic and acidic
functionalities that allow the compounds to be converted into either base or acid
addition salts.
[0173] Examples of applicable salt forms include hydrochlorides, hydrobromides, sulfates,
methanesulfonates, nitrates, maleates, acetates, citrates, fumarates, tartrates (eg
(+)-tartrates, (-)-tartrates or mixtures thereof, including racemic mixtures), succinates,
benzoates and salts with amino acids such as glutamic acid. These salts may be prepared
by methods known to those skilled in art.
[0174] The neutral forms of the compounds are preferably regenerated by contacting the salt
with a base or acid and isolating the parent compound in the conventional manner.
The parent form of the compound differs from the various salt forms in certain physical
properties, such as solubility in polar solvents.
[0175] The pharmaceutically acceptable esters in the present invention refer to non-toxic
esters, preferably the alkyl esters such as methyl, ethyl, propyl, isopropyl, butyl,
isobutyl or pentyl esters, of which the methyl ester is preferred. However, other
esters such as phenyl-C
1-5 alkyl may be employed if desired. Ester derivatives of certain compounds may act
as prodrugs which, when absorbed into the bloodstream of a warm-blooded animal, may
cleave in such a manner as to release the drug form and permit the drug to afford
improved therapeutic efficacy.
[0176] Certain compounds of the present invention can exist in unsolvated forms as well
as solvated forms, including hydrated forms. In general, the solvated forms are equivalent
to unsolvated forms and are encompassed within the scope of the present invention.
Certain compounds of the present invention may exist in multiple crystalline or amorphous
forms. In general, all physical forms are equivalent for the uses contemplated by
the present invention and are intended to be within the scope of the present invention.
[0177] When used as a therapeutic the compounds described herein often are administered
with a physiologically acceptable carrier. A physiologically acceptable carrier is
a formulation to which the compound can be added to dissolve it or otherwise facilitate
its administration. Examples of physiologically acceptable carriers include, but are
not limited to, water, saline, physiologically buffered saline.
[0178] Unless otherwise stated, structures depicted herein are also meant to include compounds
which differ only in the presence of one or more isotopically enriched atoms. For
example, compounds having the present structures except for the replacement of a hydrogen
by a deuterium or tritium, or the replacement of a carbon by
13C- or
14C-enriched carbon are within the scope of this invention. The compounds of the present
invention may also contain unnatural proportions of atomic isotopes at one or more
of atoms that constitute such compounds. For example, the compounds may be radiolabeled
with radioactive isotopes, such as for example tritium (3H), iodine-125 (
125I) or carbon-14 (
14C). All isotopic variations of the compounds of the present invention, whether radioactive
or not, are encompassed within the scope of the present invention.
[0179] A compound of the present invention can be formulated as a pharmaceutical composition.
Such a pharmaceutical composition can then be administered orally, parenterally, by
inhalation spray, rectally, or topically in dosage unit formulations containing conventional
nontoxic pharmaceutically acceptable carriers, adjuvants, and vehicles as desired.
The amount of active ingredient that can be combined with the carrier materials to
produce a single dosage form varies depending upon the mammalian host treated and
the particular mode of administration. Topical administration can also involve the
use of transdermal administration such, as transdermal patches or iontophoresis devices.
The term parenteral as used herein includes subcutaneous injections, intravenous,
intramuscular, intrasternal injection, or infusion techniques. Formulation of drugs
is discussed in, for example,
Hoover, John E., REMINGTON'S PHARMACEUTICAL SCIENCES, Mack Publishing Co., Easton,
Pa.; 1975. Other examples of drug formulations can be found in
Liberman, H. A. and Lachman, L., Eds., PHARMACEUTICAL DOSAGE FORMS, Marcel Decker,
New York, N.Y., 1980.
[0180] Injectable preparations, for example, sterile injectable aqueous or oleaginous suspensions
can be formulated according to the known art using suitable dispersing or wetting
agents and suspending agents. The sterile injectable preparation can also be a sterile
injectable solution or suspension in a nontoxic parenterally acceptable diluent or
solvent, for example, as a solution in 1,3-butanediol. Among the acceptable vehicles
and solvents that can be employed are water, Ringer's solution, and isotonic sodium
chloride solution. In addition, sterile, fixed oils are conventionally employed as
a solvent or suspending medium. For this purpose any bland fixed oil can be employed
including synthetic mono- or diglycerides. In addition, fatty acids such as oleic
acid find use in the preparation of injectables. Dimethyl acetamide, surfactants including
ionic and non-ionic detergents, polyethylene glycols can be used. Mixtures of solvents
and wetting agents such as those discussed above are also useful.
[0181] Suppositories for rectal administration of the drug can be prepared by mixing the
drug with a suitable nonirritating excipient such as cocoa butter, synthetic mono-
di- or triglycerides, fatty acids and polyethylene glycols that are sold at ordinary
temperatures but liquid at the rectal temperature and will therefore melt in the rectum
and release the drug.
[0182] Solid dosage forms for oral administration can include capsules, tablets, pills,
powders, and granules. In such solid dosage forms, the compounds of this invention
are ordinarily combined with one or more adjuvants appropriate to the indicated route
of administration. If administered per os, a compound of the invention can be admixed
with lactose, sucrose, starch powder, cellulose esters of alkanoic acids, cellulose
alkyl esters, talc, stearic acid, magnesium stearate, magnesium oxide, sodium and
calcium salts of phosphoric and sulfuric acids, gelatin, acacia gum, sodium alginate,
polyvinylpyrrolidone, and/or polyvinyl alcohol, and then tableted or encapsulated
for convenient administration. Such capsules or tablets can contain a controlled-release
formulation as can be provided in a dispersion of active compound in hydroxypropylmethyl
cellulose. In the case of capsules, tablets, and pills, the dosage forms can also
comprise buffering agents such as sodium citrate, magnesium or calcium carbonate or
bicarbonate. Tablets and pills can additionally be prepared with enteric coatings.
[0183] For therapeutic purposes, formulations for parenteral administration can be in the
form of aqueous or non-aqueous isotonic sterile injection solutions or suspensions.
These solutions and suspensions can be prepared from sterile powders or granules having
one or more of the carriers or diluents mentioned for use in the formulations for
oral administration. A compound of the invention can be dissolved in water, polyethylene
glycol, propylene glycol, ethanol, corn oil, cottonseed oil, peanut oil, sesame oil,
benzyl alcohol, sodium chloride, and/or various buffers. Other adjuvants and modes
of administration are well and widely known in the pharmaceutical art.
[0184] Liquid dosage forms for oral administration can include pharmaceutically acceptable
emulsions, solutions, suspensions, syrups, and elixirs containing inert diluents commonly
used in the art, such as water. Such compositions can also comprise adjuvants, such
as wetting agents, emulsifying and suspending agents, and sweetening, flavoring, and
perfuming agents.
[0185] The dosage regimen utilizing the compounds of the present invention in combination
with an anticancer agent is selected in accordance with a variety of factors including
type, species, age, weight, sex and medical condition of the patient; the severity
of the condition to be treated; the route of administration; the renal and hepatic
function of the patient; and the particular compound or salt or ester thereof employed.
A consideration of these factors is well within the purview of the ordinarily skilled
clinician for the purpose of determining the therapeutically effective dosage amounts
to be given to a person in need of the instant combination therapy.
[0186] Any suitable formulation of a compound described above can be prepared for administration
by methods known in the art. Selection of useful excipients or carriers can be achieved
without undue experimentation, based on the desired route of administration and the
physical properties of the compound to be administered.
[0187] Any suitable route of administration may be used, as determined by a treating physician,
including, but not limited to, oral, parenteral, intravenous, intramuscular, transdermal,
topical and subcutaneous routes. Depending on the subject to be treated, the mode
of administration, and the type of treatment desired --
e.g., prevention, prophylaxis, therapy; the compounds are formulated in ways consonant
with these parameters. Preparation of suitable formulations for each route of administration
are known in the art. A summary of such formulation methods and techniques is found
in
Remington's Pharmaceutical Sciences, latest edition, Mack Publishing Co., Easton,
PA. The formulation of each substance or of the combination of two substances will frequently
include a diluent as well as, in some cases, adjuvants, buffers and preservatives.
The substances to be administered can be administered also in liposomal compositions
or as microemulsions.
[0188] For injection, formulations can be prepared in conventional forms as liquid solutions
or suspensions or as solid forms suitable for solution or suspension in liquid prior
to injection or as emulsions. Suitable excipients include, for example, water, saline,
dextrose and glycerol. Such compositions may also contain amounts of nontoxic auxiliary
substances such as wetting or emulsifying agents, and pH buffering agents, such as,
for example, sodium acetate and sorbitan monolaurate, and so forth.
[0189] Various sustained release systems for drugs have also been devised, and can be applied
to compounds of the invention. See, for example,
U.S. patent No. 5,624,677.
[0190] Systemic administration may also include relatively noninvasive methods such as the
use of suppositories, transdermal patches, transmucosal delivery and intranasal administration.
Oral administration is also suitable for compounds of the invention. Suitable forms
include syrups, capsules, tablets, as is understood in the art.
[0191] For administration to animal or human subjects, the appropriate dosage of a compound
described above often is 0.01-15 mg/kg, and sometimes 0.1-10 mg/kg. In some embodiments,
a suitable dosage of the compound of the invention for an adult patient will be between
1 and 1000 mg per dose, frequently between 10 and 300 mg, and the dosage may be administered
1-4 times per day. Dosage levels are dependent on the nature of the condition, drug
efficacy, the condition of the patient, the judgment of the practitioner, and the
frequency and mode of administration; optimization of such parameters is within the
ordinary level of skill in the art.
Therapeutic Combinations:
[0192] Compounds of the invention may be used alone or in combination with another therapeutic
agent. The invention provides methods to treat conditions such as cancer, inflammation
and immune disorders by administering to a subject in need of such treatment a therapeutically
effective amount of a therapeutic agent useful for treating said disorder and administering
to the same subject a therapeutically effective amount of a modulator of the present
invention, i.e., a compound of the invention. The therapeutic agent and the modulator
may be "co-administered", i.e, administered together, either as separate pharmaceutical
compositions or admixed in a single Pharmaceutical composition. By "administered together",
the therapeutic agent and the modulator may also be administered separately, including
at different times and with different frequencies. The modulator may be administered
by any known route, such as orally, intravenously, intramuscularly, nasally, and the
like; and the therapeutic agent may also be administered by any conventional route.
In many embodiments, at least one and optionally both of the modulator and the therapeutic
agent may be administered orally. Preferably, the modulator is an inhibitor, and it
may inhibit either one of CK2 and Pim, or both of them to provide the treatment effects
described herein.
[0193] In certain embodiments, a "modulator" as described above may be used in combination
with a therapeutic agent that can act by binding to regions of DNA that can form certain
quadruplex structures. In such embodiments, the therapeutic agents have anticancer
activity on their own, but their activity is enhanced when they are used in combination
with a modulator. This synergistic effect allows the therapeutic agent to be administered
in a lower dosage while achieving equivalent or higher levels of at least one desired
effect.
[0194] A modulator may be separately active for treating a cancer. For combination therapies
described above, when used in combination with a therapeutic agent, the dosage of
a modulator will frequently be two-fold to ten-fold lower than the dosage required
when the modulator is used alone to treat the same condition or subject. Determination
of a suitable amount of the modulator for use in combination with a therapeutic agent
is readily determined by methods known in the art.
[0195] Compounds and compositions of the invention may be used in combination with anticancer
or other agents, such as palliative agents, that are typically administered to a patient
being treated for cancer. Such "anticancer agents" include, e.g., classic chemotherapeutic
agents, as well as molecular targeted therapeutic agents, biologic therapy agents,
and radiotherapeutic agents.
[0196] When a compound or composition of the invention is used in combination with an anticancer
agent to another agent, the present invention provides, for example, simultaneous,
staggered, or alternating treatment. Thus, the compound of the invention may be administered
at the same time as an anticancer agent, in the same pharmaceutical composition; the
compound of the invention may be administered at the same time as the anticancer agent,
in separate pharmaceutical compositions; the compound of the invention may be administered
before the anticancer agent, or the anticancer agent may be administered before the
compound of the invention, for example, with a time difference of seconds, minutes,
hours, days, or weeks.
[0197] In examples of a staggered treatment, a course of therapy with the compound of the
invention may be administered, followed by a course of therapy with the anticancer
agent, or the reverse order of treatment may be used, and more than one series of
treatments with each component may also be used. In certain examples of the present
invention, one component, for example, the compound of the invention or the anticancer
agent, is administered to a mammal while the other component, or its derivative products,
remains in the bloodstream of the mammal. For example, the present compound may be
administered while the anticancer agent or its derivative products remains in the
bloodstream, or the anticancer agent may be administered while the present compound
or its derivatives remains in the bloodstream. In other examples, the second component,
is administered after all, or most of the first component, or its derivatives, have
left the bloodstream of the mammal.
[0198] The compound of the invention and the anticancer agent may be administered in the
same dosage form, e.g., both administered as intravenous solutions, or they may be
administered in different dosage forms, e.g., one compound may be administered topically
and the other orally. A person of ordinary skill in the art would be able to discern
which combinations of agents would be useful based on the particular characteristics
of the drugs and the cancer involved.
[0199] Anticancer agents useful in combination with the compounds of the present invention
may include agents selected from any of the classes known to those of ordinary skill
in the art, including, but not limited to, antimicrotubule agents such as diterpenoids
and vinca alkaloids; platinum coordination complexes; alkylating agents such as nitrogen
mustards, oxazaphosphorines, alkylsulfonates, nitrosoureas, and triazenes; antibiotic
agents such as anthracyclins, actinomycins and bleomycins; topoisomerase II inhibitors
such as epipodophyllotoxins; antimetabolites such as purine and pyrimidine analogues
and anti-folate compounds; topoisomerase I inhibitors such as camptothecins; hormones
and hormonal analogues; signal transduction pathway inhibitors; nonreceptor tyrosine
kinase angiogenesis inhibitors; immunotherapeutic agents; pro-apoptotic agents; and
cell cycle signaling inhibitors; and other agents described below.
[0200] Anti-microtubule or anti-mitotic agents are phase specific agents that are typically
active against the microtubules of tumor cells during M or the mitosis phase of the
cell cycle. Examples of anti-microtubule agents include, but are not limited to, diterpenoids
and vinca alkaloids.
[0201] Plant alkaloid and terpenoid derived agents include mitotic inhibitors such as the
vinca alkaloids vinblastine, vincristine, vindesine, and vinorelbine; and microtubule
polymer stabilizers such as the taxanes, including, but not limited to paclitaxel,
docetaxel, larotaxel, ortataxel, and tesetaxel.
[0202] Diterpenoids, which are derived from natural sources, are phase specific anti - cancer
agents that are believed to operate at the G2/M phases of the cell cycle. It is believed
that the diterpenoids stabilize the p-tubulin subunit of the microtubules, by binding
with this protein. Disassembly of the protein appears then to be inhibited with mitosis
being arrested and cell death following.
[0203] Examples of diterpenoids include, but are not limited to, taxanes such as paclitaxel,
docetaxel, larotaxel, ortataxel, and tesetaxel. Paclitaxel is a natural diterpene
product isolated from the Pacific yew tree
Taxus brevifolia and is commercially available as an injectable solution TAXOL®. Docetaxel is a semisynthetic
derivative of paclitaxel
q.
v., prepared using a natural precursor, 10-deacetyl-baccatin III, extracted from the
needle of the European Yew tree. Docetaxel is commercially available as an injectable
solution as TAXOTERE®.
[0204] Vinca alkaloids are phase specific anti-neoplastic agents derived from the periwinkle
plant. Vinca alkaloids that are believed to act at the M phase (mitosis) of the cell
cycle by binding specifically to tubulin. Consequently, the bound tubulin molecule
is unable to polymerize into microtubules. Mitosis is believed to be arrested in metaphase
with cell death following. Examples of vinca alkaloids include, but are not limited
to, vinblastine, vincristine, vindesine, and vinorelbine. Vinblastine, vincaleukoblastine
sulfate, is commercially available as VELBAN® as an injectable solution. Vincristine,
vincaleukoblastine 22-oxo-sulfate, is commercially available as ONCOVIN® as an injectable
solution. Vinorelbine, is commercially available as an injectable solution of vinorelbine
tartrate (NA VELBINE®), and is a semisynthetic vinca alkaloid derivative.
[0205] Platinum coordination complexes are non-phase specific anti-cancer agents, which
are interactive with DNA. The platinum complexes are believed to enter tumor cells,
undergo, aquation and form intra- and interstrand crosslinks with DNA causing adverse
biological effects to the tumor. Platinum-based coordination complexes include, but
are not limited to cisplatin, carboplatin, nedaplatin, oxaliplatin, satraplatin, and
(SP-4-3)-(cis)- amminedichloro-[2-methylpyridine] platinum(II). Cisplatin, cis-diamminedichloroplatinum,
is commercially available as PLATINOL® as an injectable solution. Carboplatin, platinum,
diammine [1,1-cyclobutane-dicarboxylate(2-)-0,0'], is commercially available as PARAPLATIN®
as an injectable solution.
[0206] Alkylating agents are generally non-phase specific agents and typically are strong
electrophiles. Typically, alkylating agents form covalent linkages, by alkylation,
to DNA through nucleophilic moieties of the DNA molecule such as phosphate, amino,
sulfhydryl, hydroxyl, carboxyl, and imidazole groups. Such alkylation disrupts nucleic
acid function leading to cell death. Examples of alkylating agents include, but are
not limited to, alkyl sulfonates such as busulfan; ethyleneimine and methylmelamine
derivatives such as altretamine and thiotepa; nitrogen mustards such as chlorambucil,
cyclophosphamide, estramustine, ifosfamide, mechlorethamine, melphalan, and uramustine;
nitrosoureas such as carmustine, lomustine, and streptozocin; triazenes and imidazotetrazines
such as dacarbazine, procarbazine, temozolamide, and temozolomide. Cyclophosphamide,
2-[bis(2-chloroethyl)-amino]tetrahydro-2H-1,3,2-oxazaphosphorine 2-oxide monohydrate,
is commercially available as an injectable solution or tablets as CYTOXAN®. Melphalan,
4-[bis(2-chloroethyl)amino]-L-phenylalanine, is commercially available as an injectable
solution or tablets as ALKERAN®. Chlorambucil, 4-[bis(2-chloroethyl)amino]-benzenebutanoic
acid, is commercially available as LEUKERAN® tablets. Busulfan, 1,4-butanediol dimethanesulfonate,
is commercially available as MYLERAN® TABLETS. Carmustine, 1,3-[bis(2-chloroethyl)-1-nitrosourea,
is commercially available as single vials of lyophilized material as BiCNU®, 5-(3,3-dimethyl-1-triazeno)-imidazole-4-carboxamide,
is commercially available as single vials of material as DTIC-Dome®. Furthermore,
alkylating agents include (a) alkylating-like platinum-based chemotherapeutic agents
such as cisplatin, carboptatin, nedaplatin, oxaliplatin, satraplatin, and (SP-4-3)-(cis)-amminedichloro-[2-methylpyridine]
platinum(II); (b) alkyl, sulfonates such as busulfan; (c) ethyleneimine and methylmelamine
derivatives such as altretamine and thiotepa; (d) nitrogen mustards such as chlorambucil,
cyclophosphamide, estramustine, ifosfamide, mechlorethamine, trofosamide, prednimustine,
melphalan, and uramustine; (e) nitrosoureas such as carmustine, lomustine, fotemustine,
nimustine, ranimustine and streptozocin; (f) triazenes and imidazotetrazines such
as dacarbazine, procarbazine, temozolamide, and temozolomide.
[0207] Anti-tumor antibiotics are non-phase specific agents which are believed to bind or
intercalate with DNA. This may result in stable DNA complexes or strand breakage,
which disrupts ordinary function of the nucleic acids, leading to cell death. Examples
of anti-tumor antibiotic agents include, but are not limited to, anthracyclines such
as daunorubicin (including liposomal daunorubicin), doxorubicin (including liposomal
doxorubicin), epirubicin, idarubicin, and valrubicin; streptomyces-related agents
such as bleomycin, actinomycin, mithranrycin, mitomycin, porfiromycin; and mitoxantrone.
Dactinomycin, also know as Actinomycin D, is commercially available in injectable
form as COSMEGEN®. Daunorubicin, (8S-cis-)-8-acetyl-10-[(3-amino-2,3,6-trideoxy-a-L-lyxohexopyranosyl)oxy]-7,8,9,10-tetrahydro-6,8,11-trihydroxy-1-methoxy-5,12-naphthacenedione
hydrochloride, is commercially available as a liposomal injectable form as DAUNOXOME®
or as an injectable as CERUBIDINE®. Doxorubicin, (8S, 10S)-10-[(3-amino-2,3,6-trideoxy-α-L-lyxohexopyranosyl)oxy]-8-glycoloyl,
7,8,9,10-tetrahydro-6,8,11-trihydroxy-3-methoxy-5,12-naphthacenedione hydrochloride,
is commercially available in an injectable form as RUBEX® or ADRIAMYCIN RDF®. Bleomycin,
a mixture of cytotoxic glycopeptide antibiotics isolated from a strain of
Streptomyces verticil/
us, is commercially available as BLENOXANE®.
[0208] Topoisomerase inhibitors include topoisomerase I inhibitors such as camptothecin,
topotecan, irinotecan, rubitecan, and belotecan; and topoisomerase II inhibitors such
as etoposide, teniposide, and amsacrine.
[0209] Topoisomerase II inhibitors include, but are not limited to, epipodophyllotoxins,
which are phase specific anti-neoplastic agents derived from the mandrake plant. Epipodophyllotoxins
typically affect cells in the S and G2 phases of the cell cycle by forming a ternary
complex with topoisomerase II and DNA causing DNA strand breaks. The strand breaks
accumulate and cell death follows. Examples of epipodophyllotoxins include, but are
not limited to, etoposide, teniposide, and amsacrine. Etoposide, 4'-demethyl-epipadophyllotoxin
9[4,6-0-(R)-ethylidene-β-D-glucopyranoside], is commercially available as an injectable
solution or capsules as VePESID® and is commonly known as VP-16. Teniposide, 4'-dimethyl-epipodophyllotoxin
9[4,6-0-(R)-thenylidene-β-D-glucopyranoside], is commercially available as an injectable
solution as VUMON® and is commonly known as VM-26.
[0210] Topoisomerase I inhibitors including, camptothecin and camptothecin derivatives.
Examples of topoisomerase I inhibitors include, but are not limited to camptothecin,
topotecan, irinotecan, rubitecan, belotecan and the various optical forms (i.e., (R),
(S) or (R,S)) of 7-(4-methylpiperazino-methylene)-10, 11-ethylenedioxy-camptothecin,
as described in
U.S. Patent Nos. 6,063,923;
5,342,947;
5,559,235;
5,491,237 and pending
U.S. patent Application No. 08/977,217 filed November 24, 1997. Irinotecan HCl, (4S)-4,11-diethyl-4-hydroxy-9-[(4-piperidinopiperidino)-carbonyloxy]-1H-yrano[3',4',6,7]indolizino[1,2-b]quinoline-3,14(4H,
12H)-dione hydrochloride, is commercially available as the injectable solution CAMPT0SAR®.
Irinotecan is a derivative of camptothecin which binds, along with its active metabolite
8N-38, to the topoisomerase I-DNA complex. Topotecan HCl, (S)-10-[(dimethylamino)methyl]-4-ethyl-4,9-dihydroxy-1H-pyrano[3',4',6,7]indolizino[1,2-b]quinoline-3,14-(4H,12H)-dione
monohydrochloride, is commercially available as the injectable solution HYCAMTIN®.
[0211] Anti-metabolites include (a) purine analogs such as fludarabine, cladribine, chlorodeoxyadenosine,
clofarabine, mercaptopurine, pentostatin, and thioguanine; (b) pyrimidine analogs
such as fluorouracil, gemcitabine, capecitabine, cytarabine, azacitidine, edatrexate,
floxuridine, and troxacitabine; (c) antifolates, such as methotrexate, pemetrexed,
raltitrexed, and trimetrexate. Anti-metabolites also include thymidylate synthase
inhibitors, such as fluorouracil, raltitrexed, capecitabine, floxuridine and permetrexed;
and ribonucleotide reductase inhibitors such as claribine, clofarabine and fludarabine.
Antimetabolite neoplastic agents are phase specific anti-neoplastic agents that typically
act at S phase (DNA synthesis) of the cell cycle by inhibiting DNA synthesis or by
inhibiting purine or pyrimidine base synthesis and thereby limiting DNA synthesis.
Consequently, S phase does not proceed and cell death follows. Anti-metabolites, include
purine analogs, such as fludarabine, cladribine, chlorodeoxyadenosine, clofarabine,
mercaptopurine, pentostatin, erythrohydroxynonyladenine, fludarabine phosphate and
thioguanine; pyrimidine, analogs such as fluorouracil, gemcitabine, capecitabine,
cytarabine, azacitidine, edatrexate, floxuridine, and troxacitabine; antifolates,
such as methotrexate, pemetrexed, raltitrexed, and trimetrexate. Cytarabine, 4-amino-1-p-D-arabinofuranosyl-2
(1H)-pyrimidinone, is commercially available as CYTOSAR-U® and is commonly known as
Ara-C. Mercaptopurine, 1,7-dihydro-6H-purine-6-thione monohydrate, is commercially
available as PURINETHOL®. Thioguanine, 2-amino-1, 7-dihydro-6H-purine-6-thione, is
commercially available as TABLOID®. Gemcitabine, 2'-deoxy-2', 2'-difluorocytidine
monohydrochloride (p-isomer), is commercially available as GEMZAR®.
[0212] Hormonal therapies include (a) androgens such as fluoxymesterone and testolactone;
(b) antiandrogens such as bicalutamide, cyproterone, flutamide, and nilutamide; (c)
aromatase inhibitors such as aminoglutethiniide, anastrozole, exemestane, formestane,
and letrozole; (d) corticosteroids such as dexamethasone and prednisone; (e) estrogens
such as diethylstilbestrol; (f) antiestrogens such as fulvestrant, raloxifene, tamoxifen,
and toremifine; (g) LHRH agonists and antagonists such as buserelin, goserelin, leuprolide,
and triptorelin; (h) progestins such as medroxy-progesterone acetate and megestrol
acetate; and (i) thyroid hormones such as levothyroxine and liothyronine. Hormones
and hormonal analogues are useful compounds for treating cancers in which there is
a relationship between the hormone(s) and growth and/or lack of growth of the cancer.
Examples of hormones and hormonal analogues useful in cancer treatment include, but
are not limited to, androgens such as fluoxymesterone and testolactone; antiandrogens
such as bicalutamide, cyproterone, flutamide, and nilutamide; aromatase inhibitors
such as aminogtutethimide, anastrozole, exemestane, formestane, vorazole, and letrozole;
corticosteroids such as dexamethasone, prednisone and prednisolone; estrogens such
as diethylstilbestrol; antiestrogens such as fulvestrant, raloxifene, tamoxifen, toremifine,
droloxifene, and iodoxyfene, as well as selective estrogen receptor modulators (SERMS)
such those described in
U.S. Patent Nos. 5,681,835,
5,877,219, and
6,207,716; 5α-reductases such as finasteride and dutasteride; gonadotropin-releasing hormone
(GnRH) and analogues thereof which stimulate the release of leutinizing hormones (LH)
and/or follicle stimulating hormones (FSH), for example LHRH agonists and antagonists
such as buserelin, goserelin, leuprolide, and triptorelin; progestins such as medroxyprogesterone
acetate and megestrol acetate; and thyroid hormones such as levothyroxine and liothyronine.
[0213] Signal transduction pathway inhibitors are those inhibitors, which block or inhibit
a chemical process which evokes an intracellular change, such as cell proliferation
or differentiation. Signal tranduction inhibitors useful in the present invention
include, e.g., inhibitors of receptor tyrosine kinases, non-receptor tyrosine kinases,
SH2/SH3 domain blockers, serine/threonine kinases, phosphotidyl inositol-3 kinases,
myo-inositol signaling, and Ras oncogenes.
[0214] Molecular targeted agents include (a) receptor tyrosine kinase ('RTK') inhibitors,
such as inhibitors of EGFR, including erlotinib, gefitinib, and neratinib; inhibitors
of VEGFR including vandetanib, semaxinib, and cediranib; and inhibitors of PDGFR;
further included are RTK inhibitors that act at multiple receptor sites such as lapatinib,
which inhibits both EGFR and HER2, as well as those inhibitors that act at each of
C-kit, PDGFR and VEGFR, including but not limited to axitinib, sunitinib, sorafenib
and toceranib; also included are inhibitors of BCR-ABL, c-kit and PDGFR, such as imatinib;
(b) FKBP binding agents, such as an immunosuppressive macrolide antibiotic, including
bafilomycin, rapamycin (surolimus) and everolimus; (c) gene therapy agents, antisense
therapy agents, and gene expression modulators such as the retinoids and rexinoids,
e.g. adapalene, bexarotene, trans-retinoic acid, 9-cis-retinoic acid, and N-(4-hydroxyphenyl)retinamide;
(d) phenotype-directed therapy agents, including monoclonal antibodies such as alemtuzumab,
bevacizumab, cetuximab, ibritumomab tiuxetan, rituximab, and trastuzumab; (e) immunotoxins
such as gemtuzumab ozogamicin; (f) radioimmunoconjugates such as 131I-tositumomab;
and (g) cancer vaccines.
[0215] Several protein tyrosine kinases catalyse the phosphorylation of specific tyrosyl
residues in various proteins involved in the regulation of cell growth. Such protein
tyrosine kinases can be broadly classified as receptor or non-receptor kinases. Receptor
tyrosine kinases are transmembrane proteins having an extracellular ligand binding
domain, a transmembrane domain, and a tyrosine kinase domain. Receptor tyrosine kinases
are involved in the regulation of cell growth and are sometimes termed Growth factor
receptors.
[0216] Inapproppriate or uncontrolled activation of many of these kinases, for example by
over-expression or mutation, has been shown to result in uncontrolled cell growth.
Accordingly, the aberrant activity of such kinases has been linked to malignant tissue
Growth. Consequently, inhibitors of such kinases could provide cancer treatment methods.
[0217] Growth factor receptors include, for example, epidermal growth factor receptor (EGFr),
platelet derived growth factor receptor (PDGFr), erbB2, erb84, vascular endothelial
growth factor receptor (VEGFr), tyrosine kinase with immunoglobulin-like and epidermal
growth factor homology domains (TIE-2), insulin growth factor -I (IGFI) receptor,
macrophage colony stimulating factor (cfms), BTK, ckit, cmet, fibroblast growth factor
(FGF) receptors, Trk receptors (TrkA, TrkB, and TrkC), ephrin (eph) receptors, and
the RET protooncogene.
[0218] Several inhibitors of growth receptors are under development and include ligand antagonists,
antibodies, tyrosine kinase inhibitors and anti-sense oligonucleotides. Growth factor
receptors and agents that inhibit growth factor receptor function are described, for
instance, in
Kath, John C., Exp. Opin. Ther. Patents (2000) 10(6):803-818;
Shawver et al., Drug Discov. Today (1997), 2(2):50-63; and
Lofts, F. J. et al., "Growth factor receptors as targets", New Molecular Targets
for Cancer Chemotherapy, ed. Workman, Paul and Kerr, David, CRC press 1994, London. Specific examples of receptor tyrosine kinase inhibitors include, but are not
limited to, sunitinib, erlotinib, gefitinib, and imatinib.
[0219] Tyrosine kinases which are not growth factor receptor kinases are termed non-receptor
tyrosine kinases. Non-receptor tyrosine kinases useful in the present invention, which
are targets or potential targets of anti-cancer drugs, include cSrc, Lck, Fyn, Yes,
Jak, cAbl, FAK (Focal adhesion kinase), Brutons tyrosine kinase, and Bcr-Abl. Such
non-receptor kinases and agents which inhibit non-receptor tyrosine kinase function
are described in
Sinh, S. and Corey, S.J., J. Hematotherapy & Stem Cell Res. (1999) 8(5): 465 - 80; and
Bolen, J.B., Brugge, J.S., Annual Review of Immunology. (1997) 15: 371-404.
[0220] SH2/SH3 domain blockers are agents that disrupt SH2 or SH3 domain binding in a variety
of enzymes or adaptor proteins including, PI3-K p85 subunit, Src family kinases, adaptor
molecules (Shc, Crk, Nck, Grb2) and Ras-GAP. SH2/SH3 domains as targets for anti-cancer
drugs are discussed in
Smithgall, T.E., J. Pharmacol. Toxicol. Methods. (1995), 34(3): 125-32. Inhibitors of Serine/Threonine Kinases including MAP kinase cascade blockers which
include blockers of Raf kinases (rafk), Mitogen or Extracellular Regulated Kinase
(MEKs), and Extracellular Regulated Kinases (ERKs); and Protein kinase C family member
blockers including blockers of PKCs (alpha, beta, gamma, epsilon, mu, lambda, iota,
zeta). IkB kinase family (IKKa, IKKb), PKB family kinases, AKT kinase family members,
and TGF beta receptor kinases. Such Serine/Threonine kinases and inhibitors thereof
are described in
Yamamoto, T., Taya, S., Kaibuchi, K., J.Biochemistry. (1999) 126 (5): 799-803;
Brodt, P, Samani, A, & Navab, R, Biochem. Pharmacol. (2000) 60:1101-1107;
Massague, J., Weis-Garcia, F., Cancer Surv. (1996) 27:41-64;
Philip, P.A, and Harris, AL, Cancer Treat. Res. (1995) 78: 3-27;
Lackey, K. et al. Bioorg. Med. Chem. Letters, (2000) 10(3): 223-226;
U.S. Patent No. 6,268,391; and
Martinez-Lacaci, I., et al., Int. J. Cancer (2000),88(1): 44-52. Inhibitors of Phosphotidyl inositol-3 Kinase family members including blockers of
PI3-kinase, ATM, DNA-PK, and Ku are also useful in the present invention. Such kinases
are discussed in
Abraham, RT. Current Opin. Immunol. (1996), 8(3): 412-8;
Canman, C.E., Lim, D.S., Oncogene (1998) 17(25): 3301-8;
Jackson, S.P., Int. J. Biochem. Cell Biol. (1997) 29(7):935-8; and
Zhong, H. et al., Cancer Res. (2000) 60(6):1541-5. Also useful in the present invention are Myo-inositol signaling inhibitors such
as phospholipase C blockers and Myoinositol analogues. Such signal inhibitors are
described in
Powis, G., and Kozikowski A, (1994) New Molecular Targets for Cancer Chemotherapy,
ed., Paul Workman and David Kerr, CRC Press 1994, London.
[0221] Another group of signal transduction pathway inhibitors are inhibitors of Ras Oncogene.
Such inhibitors include inhibitors of farnesyltransferase, geranyl-geranyl transferase,
and CAAX proteases as well as anti-sense oligonucleotides, ribozymes and immunotherapy.
Such inhibitors have been shown to block ras activation in cells containing wild type
mutant ras , thereby acting as antiproliferation agents. Ras oncogene inhibition is
discussed in
Scharovsky, O.G., Rozados, V.R, Gervasoni, SI, Matar, P.,J. Biomed. Sci. (2000) 7(4):
292-8;
Ashby, M.N., Curr. Opin. Lipidol. (1998) 9(2): 99 -102; and
Oliff, A., Biochim. Biophys. Acta, (1999) 1423(3):C19-30.
[0223] Non-receptor kinase angiogenesis inhibitors may also find use in the present invention.
Inhibitors of angiogenesis related VEGFR. and TIE2 are discussed above in regard to
signal transduction inhibitors (both receptors are receptor tyrosine kinases). Angiogenesis
in general is linked to erbB2/EGFR signaling since inhibitors of erbB2 and EGFR have
been shown to inhibit angiogenesis, primarily VEGF expression. Thus, the combination
of an erbB2/EGFR inhibitor with an inhibitor of angiogenesis makes sense. Accordingly,
non-receptor tyrosine kinase inhibitors may be used in combination with the EGFR/erbB2
inhibitors of the present invention. For example, anti-VEGF antibodies, which do not
recognize VEGFR (the receptor tyrosine kinase), but bind to the ligand; small molecule
inhibitors of integrin (alphav beta3) that will inhibit angiogenesis; endostatin and
angiostatin (non-RTK) may also prove useful in combination with the disclosed erb
family inhibitors. (See
Bruns, CJ et al., Cancer Res. (2000), 60(11): 2926-2935;
Schreiber AB, Winkler ME, & Derynck R., Science (1986) 232(4755:1250-53;
Yen L. et al., Oncogene (2000) 19(31): 3460-9).
[0224] Agents used in immunotherapeutic regimens may also be useful in combination with
the compounds of formula (1). There are a number of immunologic strategies to generate
an immune response against erbB2 or EGFR. These strategies are generally in the realm
of tumor vaccinations. The efficacy of immunologic approaches may be greatly enhanced
through combined inhibition of erbB2/EGFR signaling pathways using a small molecule
inhibitor. Discussion of the immunologic/tumor vaccine approach against erbB2/EGFR
are found in
Reilly RT, et al., Cancer Res. (2000) 60(13):3569-76; and
Chen Y, et al., Cancer Res. (1998) 58(9):1965-71.
[0225] Agents used in pro-apoptotic regimens (e.g., bcl-2 antisense oligonucleotides) may
also be used in the combination of the present invention. Members of the Bcl-2 family
of proteins block apoptosis. Upregulation of bcl-2 has therefore been linked to chemoresistance.
Studies have shown that the epidermal growth factor (EGF) stimulates anti-apoptotic
members of the bcl-2 family. Therefore, strategies designed to downregulate the expression
of bcl-2 in tumors have demonstrated clinical benefit and are now in Phase II/III
trials, namely Genta's G3139 bcl-2 antisense oligonucleotide. Such pro-apoptotic strategies
using the antisense oligonucleotide strategy for bcl-2 are discussed in
Waters JS, et al., J. Clin. Oncol. (2000) 18(9): 1812-23; and
Kitada S, et al. Antisense Res. Dev. (1994) 4(2): 71-9.
[0226] Cell cycle signalling inhibitors inhibit molecules involved in the control of the
cell cycle. A family of protein kinases called cyclin dependent kinases (CDKs) and
their interaction with a family of proteins termed cyclins controls progression through
the eukaryotic cell cycle. The coordinate activation and inactivation of different
cyclin/CDK complexes is necessary for normal progression through the cell cycle. Several
inhibitors of cell cycle signaling are under development. For instance, examples of
cyclin dependent kinases, including CDK2, CDK4, and CDK6 and inhibitors for the same
are described in, for instance,
RosaniaGR & Chang Y-T., Exp. Opin. Ther. Patents (2000) 10(2):215-30.
[0227] Other molecular targeted agents include FKBP binding agents, such as the immunosuppressive
macrolide antibiotic, rapamycin; gene therapy agents, antisense therapy agents, and
gene expression modulators such as the retinoids and rexinoids, e.g. adapalene, bexarotene,
traus-retinoic acid, 9-cisretinoic acid, and N-(4 hydroxyphenyl)retinamide; phenotype-directed
therapy agents, including: monoclonal antibodies such as alemtuzumab, bevacizumab,
cetuximab, ibritumomab tiuxetan, rituximab, and trastuzumab; immunotoxins such as
gemtuzumab ozogamicin, radioimmunoconjugates such as 131-tositumomab; and cancer vaccines.
[0228] Anti-tumor antibiotics include (a) anthracyclines such as daunorubicin (including
liposomal daunorubicin), doxombicin (including liposomal doxorubicin), epirubicin,
idarubicin, and valrubicin; (b) streptomyces-related agents such as bleomycin, actinomycin,
mithramycin, mitomycin, portiromycin; and (c) anthracenediones, such as mitoxantrone
and pixantrone. Anthracyclines have three mechanisms of action: intercalating between
base pairs of the DNA/RNA strand; inhibiting topoisomerase II enzyme; and creating
iron-mediated free oxygen radicals that damage the DNA and cell membranes. Anthracyclines
are generally characterized as topoisomerase II inhibitors.
[0229] Monoclonal antibodies include, but are not limited to, murine, chimeric, or partial
or fully humanized monoclonal antibodies. Such therapeutic antibodies include, but
are not limited to antibodies directed to tumor or cancer antigens either on the cell
surface or inside the cell. Such therapeutic antibodies also include, but are not
limited to antibodies directed to targets or pathways directly or indirectly associated
with CK2. Therapeutic antibodies may further include, but are not limited to antibodies
directed to targets or pathways that directly interact with targets or pathways associated
with the compounds of the present invention. In one variation, therapeutic antibodies
include, but are not limited to anticancer agents such as Abagovomab, Adecatumumab,
Afutuzumab, Alacizumab pegol, Alemtuzumab, Altumomab pentetate, Anatumomab mafenatox,
Apolizumab, Bavituximab, Belimumab, Bevacizumab, Bivatuzumab mertansine, Blinatumomab,
Brentuximab vedotin, Cantuzumab mertansine, Catumaxomab, Cetuximab, Citatuzumab bogatox,
Cixutumumab, Clivatuzumab tetraxetan, Conatumumab, Dacetuzumab, Detumomab, Ecromeximab,
Edrecolomab, Elotuzumab, Epratuzumab, Ertumaxomab, Etaracizumab, Farletuzumab, Figitumumab,
Fresolimumab, Galiximab, Glembatumumab vedotin, Ibritumomab tiuxetan, Intetumumab,
Inotuzumab oxogamicin, Ipilimumab, Iratumumab, Labetuzumab, Lexatumumab, Lintuzumab,
Lucatumumab, Lumiliximab, Mapatumumab, Matuzumab, Milatuzumab, Mitumomab, Nacolomab
tafenatox, Naptumomab estafenatox, Necitumumab, Nimotuzumab, Ofatumumab, Olaratumab,
Oportuzumab monatox, Oregovomab, Panitumumab, Pemtumomab, Pertuzumab, Pintumomab,
Pritumumab, Ramucirumab, Rilotumumab, Rituximab, Robatumumab, Sibrotuzumab, Tacatuzumab
tetraxetan, Taplitumomab paptox, Tenatumomab, Ticilimumab, Tigatuzumab, Tositumomab,
Trastuzumab, Tremelimumab, Tucotuzumab celmoleukin, Veltuzumab, Volociximab, Votumumab,
Zalutumumab, and Zanolimumab. In some embodiments, such therapeutic antibodies include,
alemtuzumab, bevacizumab, cetuximab, daclizumab, gemtuzumab, ibritumomab tiuxetan,
pantitumumab, rituximab, tositumomab, and trastuzumab; in other embodiments, such
monoclonal antibodies include alemtuzumab, bevacizumab, cetuximab, ibritumomab tiuxetan,
rituximab, and trastuzumab; alternately, such antibodies include daclizumab, gemtuzumab,
and pantitumumab. In yet another embodiment, therapeutic antibodies useful in the
treatment of infections include but are not limited to Afelimomab, Efungumab, Exbivirumab,
Felvizumab, Foravirumab, Ibalizumab, Libivirumab, Motavizumab, Nebacumab, Pagibaximab,
Palivizumab, Panobacumab, Rafivirumab, Raxibacumab, Regavirumab, Sevirumab, Tefibazumab,
Tuvirumab, and Urtoxazumab. In a further embodiment, therapeutic antibodies can be
useful in the treatment of inflammation and/or autoimmune disorders, including, but
are not limited to, Adalimumab, Atlizumab, Atorolimumab, Aselizumab, Bapineuzumab,
Basiliximab, Benralizumab, Bertilimumab, Besilesomab, Briakinumab, Canakinumab, Cedelizumab,
Certolizumab pegol, Clenoliximab, Daclizumab, Denosumab, Eculizumab, Edobacomab, Efalizumab,
Erlizumab, Fezakinumab, Fontolizumab, Fresolimumab, Gantenemmab, Gavilimomab, Golimumab,
Gomiliximab, Infliximab, Inolimomab, Keliximab, Lebrikizumab, Lerdelimumab, Mepolizumab,
Metelimumab, Muromonab-CD3, Natalizumab, Ocrelizumab, Odulimomab, Omalizumab, Otelixizumab,
Pascolizumab, Priliximab, Reslizumab, Rituximab, Rontalizumab, Rovelizumab, Ruplizumab,
Sifalimumab, Siplizumab, Solanezumab, Stamulumab, Talizumab, Tanezumab, Teplizumab,
Tocilizumab, Toralizumab, Ustekinumab, Vedolizumab, Vepaliznoznab, Visilizumab, Zanolimumab,
and Zolimomab aritox. In yet another embodiment, such therapeutic antibodies include,
but are not limited to adalimumab, basiliximab, certolizumab pegol, eculizumab, efalizurnab,
infliximab, muromonab-CD3, natalizumab, and omalizumab. Alternately the therapeutic
antibody can include abciximab or ranibizumab. Generally a therapeutic antibody is
non-conjugated, or is conjugated with a radionuclide, cytokine, toxin, drug-activating
enzyme or a drug-filled liposome.
[0230] Akt inhibitors include 1L6-Hydroxymethyl-chiro-inositol-2-(R)-2-O-methyl-3-O-octadecyl-
sn-glycerocarbonate, SH-5 (Calbiochem Cat. No. 124008), SH-6 (Calbiochem Cat. No. Cat.
No. 124009), Calbiochem Cat. No. 124011, Triciribine (NSC 154020, Calbiochem Cat.
No. 124012), 10-(4'-(N-diethylamino)butyl)-2-chlorophenoxazine, Cu(II)Cl
2(3-Formylchromone thiosemicarbazone), 1,3-dihyrdro-1-(1-((4-(6-phenyl-1H-imidazo[4,5-g]quinoxalin-7-yl)phenyl)methyl)-4-piperidinyl)-2H-benzimidazol-2-one,
GSK690693 (4-(2-(4-amino-1,2,5-oxadiazol-3-yl)-1-ethyl-7-{[(3S)-3-piperidinylmethyl]oxy}-1H-imidazo[4,5-c]pyridin-4-yl)-2-methyl-3-butyn-2-ol),
SR13668 ((2,10-dicarbethoxy-6-methoxy-5,7-dihydro-indolo[2,3-b] carbazole), GSK2141795,
Perifosine, GSK21110183, XL418, XL147, PF-04691502, BEZ-235 [2-Methyl-2-[4-(3-methyl-2-oxo-8-quinolin-3-yl-2,3-dihydro-imidazo[4,5-c]quinolin-1-yl)-phenyl]-propionitrile],
PX-866 ((acetic acid (1S,4E,10R,11R,13S,14R)-[4-diallylaminomethylene-6-hydroxy-1-methoxymethyl-10,13-dimethyl-3,7,17-trioxo-1,3,4,7,10,11,12,13,14,15,16,17-dodecahydro-2-oxa-cyclopenta[a]phenanthren-11-yl
ester)), D-106669, CAL-101, EDC0941 (2-(1H-indazol-4-yl)-6-(4-methanesulfonyl-piperazin-1-ylmethyl)-4-morpholin-4-yl-thieno[3,2-d]pyrimidine),
SF1126, SF1188, SF2523, TG100-115 [3-[2,4-diamino-6-(3-hydroxyphenyl)pteridin-7-yl]phenol].
A number of these inhibitors, such as, for example, BEZ-235, PX-866, D 106669, CAL-101,
GDC0941, SF1126, SF2523 are also identified in the art as PI3K/mTOR inhibitors; additional
examples, such as PI-103 [3-[4-(4-morpholinylpyrido[3',2':4,5]furo[3,2-d]pyrimidin-2-yl]phenol
hydrochloride] are well-known to those of skill in the art. Additional well-known
PI3K inhibitors include LY294002 [2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one]
and wortmannin. mTOR inhibitors known to those of skill in the art include temsirolimus,
deforolimus, sirolimus, everolimus, zotarolimus, and biolimus A9. A representative
subset of such inhibitors includes temsirolimus, deforolimus, zotarolimus, and biolimus
A9.
[0231] HDAC inhibitors include (i) hydroxamic acids such as Trichostatin A, vorinostat (suberoylanilide
hydroxamic acid (SAHA)), panobinostat (LBH589) and belinostat (PXD101) (ii) cyclic
peptides, such as trapoxin B, and depsipeptides, such as romidepsin (NSC 630176),
(iii) benzamides, such as MS-275 (3-pyridylmethyl-N-{4-[(2-aminophenyl)-carbamoyl]-benzyl}-carbamate),
CI994 (4-acetylamino-N-(2aminophenyl)-benzamide) and MGCD0103 (N-(2-aminophenyl)-4-((4-(pyridin-3-yl)pyrimidin-2-ylamino)methyl)benzamide),
(iv) electrophilic ketones, (v) the aliphatic acid compounds such as phenylbutyrate
and valproic acid.
[0232] Hsp90 inhibitors include benzoquinone ansamycins such as geldanamycin, 17-DMAG (17-Dimethylamino-ethylamino-17-demethoxygeldanamycin),
tanespimycin (17-AAG, 17-allylamino-17-demethoxygeldanamycin), EC5, retaspimycin (IPI-504,
18,21-didehydro-17-demethoxy-18,21-dideoxo-18,21-dihydroxy-17-(2-propenylamino)-geldanamycin),
and herbimycin; pyrazoles such as CCT 018159 (4-[4-(2,3-dihydro-1,4-benzodioxin-6-yl)-5-methyl-1H-pyrazol-3-yl]-6-ethyl-1,3-benzenediol);
macrolides, such as radicocol; as well as BHB021 (CNF2024), SNX-5422, STA-9090, and
AUY922.
[0233] Miscellaneous agents include altretamine, arsenic trioxide, gallium nitrate, hydroxyurea,
levamisole, mitotane, octreotide, procarbazine, suramin, thalidomide, lenalidomide,
photodynamic compounds such as methoxsalen and sodium porfimer, and proteasome inhibitors
such as bortezomib.
[0234] Biologic therapy agents include: interferons such as interferon-α2a and interferon-α2b,
and interleukins such as aldesleukin, denileukin diftitox, and oprelvekin.
[0235] In addition to these anticancer agents intended to act against cancer cells, combination
therapies including the use of protective or adjunctive agents, including: cytoprotective
agents such as armifostine, dexrazonxane, and mesna, phosphonates such as parmidronate
and zoledronic acid, and stimulating factors such as epoetin, darbepoetin, filgrastim,
PEG-filgrastim, and sargramostim, are also envisioned.
Examples:
[0236] The following examples illustrate the invention. Compounds outside the scope of the
present claims are included as reference embodiments.
Example 1. Synthesis of 5-chloropyrazolo[1,5-a]pyrimidin-7-amine
[0237]

[0238] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (3 g, 16 mmol) was added
along with ammonium hydroxide solution (48 mL). The heterogeneous reaction was refluxed
at 85°C for 12 hours. After cooling to room temperature, the mixture was filtered,
washed with water, and dried under vacuum overnight. The product, 5-chloropyrazolo[1,5-a]pyrimidin-7-amine,
was collected as an off-white solid in 88% yield. LCMS (M+1=169)
Example 2. Synthesis of tert-butyl 5-chloropyrazolo[1,5-a]pyrimidin-7-ylcarbamate
[0239]

[0240] To the reaction flask, 5-chloropyrazolo[1,5-a]pyrimidin-7-amine (2.4 g, 14.1 mmol)
was added to dichloromethane (35 mL) along with di-tert-butyl dicarbonate (3.7 g,
17 mmol), triethylamine (2.4 mL, 17 mmol) and DMAP (100 mg, 0.8 mmol). The reaction
was stirred at room temperature for 6 hours then diluted with DCM, washed with saturated
NaHCO
3 solution (3x) followed by washing with brine. The organic layer was isolated, dried
over anhydrous MgSO
4, filtered, and evaporated to dryness. The product, tert-butyl 5-chloropyrazolo[1,5-a]pyrimidin-7-ylcarbamate,
was collected as an off-white solid in 98% yield. LCMS (M-t-Butyl =213)
Example 3. Synthesis of tert-butyl-5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylcarbamate
[0241]

[0242] To tert-butyl 5-chloropyrazolo[1,5-a]pyrimidin-7-ylcarbamate (3.7 g, 13.8 mmol))
in DMF (36 mL), POCl
3 (7.7 mL, 82.9 mmol) was added dropwise at 0°C. After the addition was complete, the
reaction was allowed to warm to room temperature and stirred for 8 hours. Then, the
reaction was quenched by slow addition to ice cold 6N NaOH. The mixture was diluted
with water then the solid was collected by filtration. The solid was washed several
more times with water and dried under vacuum overnight. The product, tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylcarbamate,
was collected as a solid in 27% yield. The product did not ionize on LCMS unless first
deprotected using TFA/DCM (1:1). LCMS (M+1=197)
Example 4. Synthesis of 7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0243]

[0244] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylcarbamate (1.1 g, 3.8 mmol)
was added to 1,4-dioxane (15 mL) along with 3-chloroaniline (2.4 mL, 22.6 mmol) and
p-toluenes ulfonic acid monohydrate (73 mg, 0.4 mmol). The reaction was heated at
95°C for 12 hours then cooled to room temperature, diluted with water and filtered.
Analysis of the recovered solid by LCMS showed product mass (M+1 = 288), as well as,
product with chloro aniline imine mass (M+1 = 397). To completely convert this mixture
to the desired product, the solid was dissolved in 6 mL of MeOH/conc. HCl solution
(1:1) and heated at 60°C for 1.5 hours. The reaction was quenched by slow addition
to ice cold 6N NaOH. The mixture was diluted with water then the solid was collected
by filtration. The solid was washed several more times with water then dried under
vacuum overnight. The product, 7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde,
was collected as orange-red solid in 38% yield. LCMS(M+1=288)
Example 5. Synthesis of 5-((7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0245]

[0246] To the reaction vial, 7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(411 mg, 1.4 mmol) was added to ethanol (5.2 mL) along with Hydantoin (143 mg, 1.4
mmol) and piperidine (141 µL, 1.4 mmol). The reaction was heated at 80°C for 60 minutes
in the microwave. The reaction was then cooled to room temperature and diluted with
water. The solid was collected by filtration, washed with water and cold ethanol.
The material was dried under vacuum overnight. The product, 5-((7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione,
was recovered as a red solid in 54% yield. LCMS (M+1 = 370)
Example 6. Synthesis of N-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-yl)piperidine-4-carboxamide
[0247]

[0248] To the reaction vial, 5-((7-amino-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(15 mg, 0.04 mmol) was added to DMF (0.2 mL) along with HBTU (30 mg, 0.08 mmol), DIEA
(28 µL, 0.16 mmol) and 1-(tert-butoxycarbonyl)piperidine-4-carboxylic acid (18 mg,
0.08 mmol). The reaction was stirred at room temperature for 8 hours then heated at
95°C for 4 hours. The reaction was then cooled to room temperature and diluted with
water. The solid was collected by filtration, washed with water, 1N HCl solution,
and more water. The material was then dissolved in 5% DCM/MeOH and purified by prep
HPLC. The isolated fractions were combined and evaporated to dryness. The material
was dissolved in 1 mL of TFA/DCM (1:1) and stirred at room temperature for 1 hour.
The solvent was removed by evaporation under a stream of nitrogen and the crude material
was washed with 1N NaOH followed by water. The solid was collected by filtration and
dried under vacuum overnight. The product, N-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-yl)piperidine-4-carboxamide,
was recovered as a solid in 2% yield. LCMS (M+1 = 481).
[0249] Table 1 below shows the biological acvities of Examples 5 and 6 as listed as Compounds
A1 and B1.
Table 1.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| A1 |
<0.1 |
1.1779 |
2.464 |
16.599 |
| B1 |
<1.0 |
2.5000 |
|
|
Example 7. Synthesis of 5-chloro-N-cyclopropylpyrazolo[1,5-a]pirimidin-7-amine
[0250]

[0251] To 5,7-dichloropyrazolo[1.5-a]pyrimidine (200 mg, 1.06 mmol) in ACN was added Et
3N (148 µl, 1.06 mmol) and cyclopropylamine (75µl, 1.06 mmol). The reaction was refluxed
at 80°C overnight. The mixture was concentrated under reduced pressure, dissolved
in DCM, and washed with water. The resulting organic layer was dried over Na
2SO
4 and concentrated under reduced pressure to afford 156 mg of 5-chloro-N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine
(70% yield). LCMS (M+1=209)
Example 8. Synthesis of 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0252]

[0253] To 5-chloro-N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine (156 mg, 0.75 mmol) in
DMF was added POCl
3 (205 µl, 2.25 mmol). The mixture was stirred at room temperature for 3 hours. Ice
was added to quench excess POCl
3 then the mixture was neutralized with 1M NaOH. DCM was added and the product was
extracted three times. The organic layer was dried over Na
2SO
4 and concentrated under reduced pressure to yield 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
Some residual DMF could not be removed. LCMS (M+1=237)
Example 9. Synthesis of 5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0254]

[0255] To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (177 mg,
0.75 mmol) in 1,4-dioxane was added 3-chloroaniline (397 µl, 3.75 mmol). The mixture
was heated in microwave at 120°C for 60 minutes. The precipitate was filtered off,
and the filtrate was purified by prep TLC (1%MeOH/DCM) to yield 26 mg (11% yield)
of 5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
LCMS (M+1=328)
Example 10. Synthesis of 5-((5-(3-chlorophenylamino)-7-cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0256]

[0257] To 5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(26 mg, 0.08 mmol) in EtOH was added hydantoin (8 mg, 0.08 mmol) and piperidine (8
µl, 0.08 mmol). The mixture was stirred at 70°C over the weekend. Insolubilities were
filtered off, and filtrate was concentrated under reduced pressure. Filtrate was then
dissolved in MeOH and isolated by prep HPLC to yield 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=410)
Example 11. Synthesis of 7-(cyclopropylamino)-5-(3-fluorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0258]

[0259] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (0.2 g, 0.59 mmol) was suspended in ethanol
(2 mL). 3-fluoroaniline (189 mg, 1.48 mmol) was added, followed by 4M HCl/dioxane
(0.3 mL, 1.18 mmol). The reaction was heated to 80 °C for 6 h, and then the volatiles
were removed
in vacuo. The residue was diluted with water (10 mL) and the pH was adjusted to 12 by the addition
of 6M NaOH. The solution was stirred for 0.5 h, then the precipitate, which is a mixture
of
tert-butyl cyclopropyl(5-(3-fluorophenylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl)carbamate and the corresponding imine, were isolated by filtration
and dried
in vacuo. The imine was hydrolyzed by dissolving in methanol (9 mL), 1,4-dioxane (3.6 mL) and
6M HCl (9 mL) and heating at 60 °C for 5 h. The solution was poured onto ice (50 mL)
and the pH was adjusted to 12 by addition of 6M NaOH. The precipitate was isolated
by filtration and dried
in vacuo to provide
tert-butyl cyclopropyl(5-(3-fluorophenylamino)-3-formylpyrazolo[1,5-
a]pirimidin-7-yl)carbamate (172 mg, 93%). LCMS (M+1=312)
Example 12. Synthesis of 5-((7-cyclopropylamino)-5-(3-fluorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0260]

[0261] Hydantoin (69 mg, 0.69 mmol) and piperidine (69 µL, 0.69 mmol) were added to 7-(cyclopropylamino)-5-(3-fluorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(72 mg, 0.23 mmol) dissolved in ethanol (1.1 mL). The reaction was heated at 80 °C.
After 15 h, the reaction was cooled to r.t., diluted with water (5 mL), and the precipitate
was collected and washed with 1:1 ethanol:water (5 mL). The bright yellow solid was
dried
in vacuo to give (Z)-5-((7-(cyclopropylamino)-5-(3-fluorophenylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (25 mg, 10% over 3 steps). LCMS
(M+1=507)
[0262] The compounds described in the following Table 2A were prepared using chemistries
similar to those exemplified in
Example 11 and
Example 12. All compounds were characterized by LCMS. Table 2B shows the biological activities
of the compounds listed in Table 2A.
Table 2B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| C1 |
<0.01 |
1.3 |
>2.5000 |
1.038 |
15.029 |
| D1 |
<0.01 |
|
2.2002 |
1.34 |
4.067 |
| E1 |
<0.01 |
|
>2.5000 |
17.713 |
16.835 |
| F1 |
<0.01 |
|
>2.5000 |
2.037 |
5.763 |
Example 13. Synthesis of 7-(cyclopropylamino)-5-(3,5-difluorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0263]

[0264] 3,5-Difluoroaniline (29 mg, 0.22 mmol), Cs
2CO
3 (67 mg, 0.21 mmol) were added to
Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (50 mg, 0.15 mmol) dissolved in 1,4-dioxane
(1 mL). Racemic BINAP (6 mg, 0.06 mmol) and palladium(II) acetate (4 mg, 0.04 mmol)
were then added. The mixture was sealed and irradiated at 110 °C for 20 min in the
microwave. Et
2O (3 mL) was added and the solution was filtered. The filtrate was concentrated
in vacuo. The crude residue was dissolved in dichloromethane (1.5 mL) and trifluoroacetic acid
(1.5 mL). After 1 h, the solution was concentrated under a stream of air. The residue
was triturated with 20% 2-propanol/hexanes. The product was filtered to yield 7-(cyclopropylamino)-5-(3,5-difluorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(39 mg, 80%). LCMS (M+1=330)
[0265] The compounds described in the following Table 3 were prepared using chemistries
similar to those exemplified in
Example 13. All compounds were characterized by LCMS.
Example 14. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(3,5-difluorophenylamino)pyrazolo-[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0266]

[0267] Hydantoin (28 mg, 0.28 mmol) and piperidine (42 µL, 0.42 mmol) were added to 7-(cyclopropylamino)-5-(3,5-difluorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(52 mg, 0.16 mmol) dissolved in ethanol (1 mL). The reaction was heated at 80°C. After
12 h, the reaction was cooled to r.t., diluted with water (2 mL), and the precipitate
was collected and washed with 1:1 ethanol:water (5 mL). The solid was dried
in vacuo to give (
Z)-5-((7-(cyclopropylamino)-5-(3,5-difluorophenylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (18 mg, 28% over 3 steps). LCMS
(M+1=440)
[0268] The compounds described in the following tables were prepared using chemistries similar
to those exemplified in
Example 14. All compounds were characterized by LCMS. Table 4B shows the biological activities
of the compounds listed in Table 4A.
Table 4B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| G1 |
<0.01 |
> 2.5000 |
10.006 |
>30 |
| H1 |
<0.01 |
> 2.5000 |
0.991 |
3.209 |
| I1 |
<0.01 |
> 2.5000 |
11.121 |
15.148 |
| J1 |
<0.01 |
2.4799 |
7.116 |
3.924 |
| K1 |
<0.01 |
> 2.5000 |
7.711 |
5.66 |
| L1 |
<0.01 |
> 2.5000 |
0.5 |
1.354 |
| M1 |
<0.01 |
> 2.5000 |
|
|
| N1 |
<.0.01 |
1.9706 |
|
|
| O1 |
<0.01 |
> 2.5000 |
|
|
| P1 |
<0.01 |
> 2.5000 |
|
|
| Q1 |
<0.01 |
> 2.5000 |
|
|
| R1 |
<0.01 |
> 2.5000 |
|
|
| S1 |
<0.01 |
2.041 |
|
|
[0269] The compounds described in the following Table 5 were prepared following the general
scheme below using chemistries similar to
Example 13 and
Example 14.

Example 15. Synthesis of 5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0270]

[0271] To
tert-butyl 5-chloro-3-formylpyrazolo[1, 5-a]pyrimidin-7-yl (cyclopropylmethyl) carbamate
(50 mg, 0.14 mmol) in 1 mL of 1,4 dioxane was added cesium carbonate (65 mg, 0.2 mmol),
Pd(OAc)
2 (4 mg, 0.006 mmol), (±)-BINAP (5 mg, 0.009 mmol), 3-chloro-4-fluoroaniline (31 mg,
0.21 mmol). The reaction mixture was heated in microwave at 110°C for 20 minutes.
The mixture was then cooled to room temperature, water was added, and the product
was extracted with ether. The organic layer was then concentrated under reduced pressure
and the crude product was dissolved in 1:1 mixture of dichloromethane and trifluoroacetic
acid at room temperature for 1hour. The reaction mixture was concentrated with 10
mL of dichloromethane. To the reaction mixture, ether/ hexanes (1:1) was added and
the flask was sonicated for 10 minutes then filtered to obtain the yellow precipitate.
The precipitate was washed with hexane to yield 5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino)
pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde. LCMS (M+1=460)
Example 16. Synthesis of 5-((5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0272]

[0273] To 5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino) pyrazolo [1, 5-a]
pyrimidine-3-carbaldehyde (40 m.g, 0.09 mmol) in 1.0 mL of ethanol was added hydantoin
(9 mg, 0.09 mmol) and piperdine (8 ul). The reaction was heated at 80°C overnight,
cooled to room temperature, filtered, and washed with ethanol to yield 20 mg (31%
yield) (Z)-5-((5-(3-chloro-4-fluorophenylamino)-7-(cyclopropylmethylamino) pyrazolo
[1, 5-a] pyrimidin-3-yl) methylene) imidazolidine-2,4-dione as a yellow powder. LCMS
(M+1=442)
[0274] The compounds described in the following tables were prepared using chemistries similar
to those exemplified in
Example 15 and Example 16. All compounds were characterized by LCMS. Table 6B shows the biological activities
of the compounds listed in Table 6A.
Table 6B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| T1 |
<0.01 |
0.5087 |
2.196 |
12.315 |
| U1 |
<0.1 |
> 2.5000 |
|
|
| V1 |
<0.1 |
> 2.5000 |
5.086 |
6.188 |
| W1 |
<0.1 |
> 2.5000 |
7.424 |
9.207 |
| X1 |
<0.1 |
> 2.5000 |
6.935 |
7.986 |
| Y1 |
<0.1 |
> 2.5000 |
|
|
| Z1 |
<0.1 |
|
|
|
| A2 |
<0.1 |
|
|
|
| B2 |
<0.1 |
|
|
|
| C2 |
<0.1 |
|
|
|
| D2 |
<0.1 |
|
|
|
| E2 |
<0.01 |
|
|
|
| F2 |
<0.1 |
|
|
|
| G2 |
<0.01 |
|
|
|
| H2 |
<0.01 |
|
|
|
| I2 |
<0.1 |
|
|
|
Example 17. Synthesis of tert-butyl 5-azido-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0275]

[0276] To tert-butyl 5-chloro-3-formylpyrazolo [1,5-a] pyrimidin-7-yl (cyclopropyl) carbamate
(500 mg 1.5 mmol) in dimethylformamide was added sodium azide (150 mg, 2.3 mmol) then
the reaction mixture was stirred at room temperature for 30 minutes. The reaction
mixture was then partitioned between ethyl acetate/water. The organic layer was collected,
dried over sodium sulfate, filtered, and concentrated under high vacuum to yield tert-butyl
5-azido-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate. The crude product
was taken to next step without further purification. LCMS (M+1=344)
Example 18. Synthesis of 5-amino-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0277]

[0278] The crude product, tert-butyl 5-azido-3-formylpyrazolo [1, 5-a] pyrimidin-7-yl (cyclopropyl)
carbamate was subjected to hydrogenation using 10% wt palladium on carbon in ethanol.
The reaction was stirred under hydrogen for 3 hours. The mixture was filtered through
celite and sonicated with 1:1 mixture of ethyl acetate and hexane. The yellow solid
was filtered and dried under reduced pressure and was dissolved in (1:1) DCM/TFA at
room temperature for 1 hour. The reaction mixture was washed with aqueous sodium bicarbonate
solution and extracted with dichloromethane. The organic layer was concentrated and
dried under high vacuum to yield 5-amino-7-(cyclopropylamino) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde
as product 310 mg (95% yield on three steps). LCMS (M+1=218)
Example 19. Synthesis of (Z)-5-((5-amino-7-(cycloropylamino)pyrazolo[1,5-a]pyramidin-3-yl)methylene)imidazolidine-2,4-dione
[0279]

[0280] To 5-amino-7-(cyclopropylamino) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde (75 mg,
0.34 mmol) in 1.0 mL ethanol was added hydantoin (34 mg, 0.34 mmol) and piperdine
(33 ul). The reaction was heated at 80°C overnight. The reaction mixture was cooled
to room temperature and yellow precipitate was filtered, washed with ethanol to yield
45 mg (44% yield) Z)-5-((5-amino-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=300)
Example 20. Synthesis of methyl 7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylcarbamate
[0281]

[0282] To 5-amino-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (50 mg, 0.23
mmol) in 1.0 mL tetrahydrofuran was added methyl chloroformate (35 ul, 0.46 mmol)
and DIEA (39 ul). The reaction mixture was heated at 60°C for one hour. The reaction
was partitioned between ethyl acetate/water. The organic layer was col lected, dried
over sodium sulfate, and concentrated under high vacuum to yield methyl 7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylcarbamate.
The crude product was taken to next step without further purification. LCMS (M+1=276)
Example 21. Synthesis of (Z)-methyl 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylcarbamate
[0283]

[0284] To methyl 7-(cyclopropylamino)-3-formylpyrazolo [1, 5-a] pyrimidin-5-ylcarbamate
(33 mg, 0.12 mmol) in 1.0 mL ethanol was added Hydantoin (12 mg, 0.12 mmol) and piperdine
(11 ul). The reaction was heated at 80°C for two hours. The reaction was cooled to
room temperature, the yellow precipitate was filtered, and washed with ethanol to
yield 15 mg (40% yield) (Z)-methyl 7-(cyclopropylamino)-3-((2, 5-dioxoimidazolidin-4-ylidene)
methyl) pyrazolo [1, 5-a] pyrimidin-5-ylcarbamate. LCMS (M+1=358)
Example 22. Synthesis of N-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)cyclopropanecarboxamide
[0285]

[0286] To 5-amino-7-(cyclopropylamino) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde (step
b) (58 mg, 0.266 mmol) in 1.0 mL tetrahydrofuran was added cyclopropane carbonyl chloride
(38 ul, 0.419mmol) and DIPEA (39.0 ul). The reaction mixture was heated at 60°C for
one hour. The reaction was partitioned between ethyl acetate and water, the organic
layer was dried under sodium sulfate concentrated on high vac to yield N-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)
cyclopropanecarboxamide. The crude product was taken to next step without further
purification. LCMS (M+1=286)
Example 23. Synthesis of (Z)-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyramidin-5-yl)cyclopanecarboxamide
[0287]

[0288] To N-(7-(cyclopropylamino)-3-formylpyrazolo [1, 5-a] pyrimidin-5-yl) cyclopropanecarboxamide
(74 mg, 0.26 mmol) in 1.0 mL ethanol was added hydantoin (26 mg, 0.26 mmol) and piperdine
(24 ul). The reaction was heated at 80°C for two hours. The reaction mixture was cooled
to room temperature, concentrated and diluted with MeOH. The product was purified
by prep HPLC to yield 14 mg (20% yield) (Z)-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclopropanecarboxamide.
LCMS (M+1=368)
[0289] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 20 and
Example 16. All compounds were characterized by LCMS. Table 7B shows the biological activities
of the compounds listed in Table 7A.
Table 7B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| J2 |
<0.1 |
> 2.5000 |
|
|
| K2 |
<0.01 |
> 2.5000 |
11.768 |
9.93 |
| L2 |
<0.01 |
|
4.17 |
10.986 |
Example 24. Synthesis of 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0290]

[0291] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbarmate (0.5 g, 1.48 mmol) was dissolved in glacial
acetic acid (5 mL). NaOAc (1.21g, 14.8 mmol) and Hydantoin (356 mg, 3.56 mmol) were
added and the reaction was placed in a 110 °C bath for 4 d. The solution was cooled
to r.t. and water (15 mL) was added. The precipitate was filtered and then triturated
with ethanol (5 mL) and then CH
2Cl
2 (5 mL) to give (
Z)-5-((5-(chloro-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (202 mg, 43%). LCMS (ES): >85% pure,
m/z 319 [M+1]
+.
Example 25. Synthesis of 5-((7-(cyclopropylamino)-5-(4,4-difluoropiperidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0292]

[0293] (
Z)-5-((5-(Chloro-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)melhylene)imidazolidine-2,4-dione (25 mg, 0.08 mmol) was suspended
in NMP (0.2 mL). 4,4-difluoropiperidine hydrochloride (60 mg, 0.38 mmol) and diisopropylethylamine
(67 µL, 0.38 mmol) were added and the reaction was irradiated in the microwave at
140°C for 20 min. The product was purified by preparative HPLC to afford (
Z)-5-((7-(cyclopropylamino)-5-(4,4-difluoropiperidin-1-yl)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (5.9 mg, 14%). LCMS (ES): >95% pure,
m/z 404 [M+1]
+.
Example 26. Synthesis of 5-(cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
[0294]

[0295] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate (1.0 eq,
105 mg, 0.312 mmol) was dissolved in DMF (1 ml) in a vial. K
2CO
3 (1.5 eq, 64 mg, 0.463 mmol) and cyclopentylamine (1.5 eq, 46 ul, 0.465 mmol) were
added and the mixture was stirred at 50°C for one hour. An additional amount of cyclopentylamine
(1.5 eq, 46 ul, 0.465 mmol) was added and the mixture stirred at 70°C for 2 hours.
Water was added and the resulting precipitate was filtered and dried to provide 130
mg of solid. This solid was stirred in HCl 4N in dioxane (4 ml) at room temperature
for 4 hours. Methanol (1 ml) and aqueous 6N HCl (2 ml) were added and the mixture
stirred at room temperature overnight. The reaction was subsequently stirred overnight
at 60°C to complete the imine hydrolysis. The reaction was neutralized with 6N NaOH
and the compound extracted with methylene chloride. After drying over Na
2SO
4, and evaporation of-the volatiles, the material was triturated in ethylacetate to
form a solid. 5-(cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
was isolated as a solid by filtration (21mg). LCMS (ES):>95% pure, m/z 286 [M+H]
+.
Example 27. Synthesis of 5-((5-(cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
[0296]

[0297] 5-(Cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(1.0 eq, 20 mg, 0.070 mmol) was mixed in a vial with hydantoin (2.8 eq, 20 mg, 0.20
mmol) in Ethanol (0.3 ml). Piperidine (2.9 eq, 20 ul, 0.202 mmol) was added and the
mixture was stirred at 90°C for 3 hours. The mixture was cooled down, the precipitate
was filtered, washed with ethanol and dried. (Z)-5-((5-(cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
was isolated as a solid (25 mg, 100%). LCMS (ES):>95% pure, m/z 368 [M+H]
+.
[0298] The compounds listed in the following Table 6 are Example 25, Example 26, and Example
27.
Table 8.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| M2 |
<0.01. |
0.359 |
6.676 |
4.872 |
| N2 |
<0.01 |
0.8453 |
3.042 |
9.185 |
| O2 |
<0.01 |
> 2.5000 |
4.514 |
10.417 |
Example 28. Synthesis of (R,Z)-5-((7-(cyclopropylamino)-5-(3-fluoropyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
[0299]

[0300] (R,Z)-5-((7-(Cyclopropylamino)-5-(3-fluoropyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
was prepared using chemistries similar to the ones used to prepare (Z)-5-((5-(cyclopentylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
The compound was isolated as a solid (84 mg, 75% yield). LCMS (ES):>95% pure, m/z
372 [M+H]
+.
Example 29. Synthesis (Z)-5-((5-((1r,4r)-4-aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate.
[0301]

[0302] 5-Chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate (1.0 eq, 113
mg, 0.335 mmol) was mixed in a vial with
trans-tert-butyl 4-aminocyclohexylcarbamate (1.0 eq, 81 mg, 0.335 mmol) and K
2CO
3 (5.0 eq, 232 mg, 1.68 mmol) in DMF (1 ml). The mixture was stirred at 70°C for 2.5
hours. Water was added, the solid was filtered and dried. The compound was treated
with hydantoin (3.0 eq, 100 mg), piperidine (3.0 eq, 100 ul) in ethanol (2 ml) at
85-90°C for 4.5 hours. Water was added and the solid was filtered and dried. The crude
solid was suspended in methylene chloride (5 ml) and trifluoroacetic acid (1 ml) and
the mixture was stirred at room temperature for 1 hour. The volatiles were evaporated.
The residue was dissolved in methanol and water and subjected to purification by preparative
HPLC. After genevac evaporation (Z)-5-((5-((1r,4r)-4-aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2
.4-dione 2,2,2-trifluoroacetate was isolated a yellow solid (96 mg, 56% yield). LCMS
(ES):>99% pure, m/z 397 [M+H]
+. Two isomers detected (ratio: 97.5% and 2.5%).
[0303] The following compounds were prepared using chemistries similar to the one used in
Example 26,
Example 27,
Example 28 and
Example 29. Compounds were characterized by LCMS. Table 9B shows the biological activities
of the compounds listed in Table 9A.
Table 9B.
| Compounds |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| P2 |
<0.01 |
0.7076 |
0.66 |
2.12 |
| Q2 |
<0.01 |
0.2841 |
0.154 |
5.371 |
| R2 |
<0.1 |
0.8783 |
|
|
| S2 |
<0.01 |
1.2984 |
3.507 |
3.876 |
| T2 |
<0.01 |
0.9978 |
2.494 |
6.901 |
| U2 |
<0.01 |
0.7659 |
12.773 |
> 30 |
| V2 |
<0.01 |
1.3652 |
1.483 |
1.626 |
| W2 |
<0.01 |
0.8771 |
|
|
| X2 |
<0.01 |
1.952 |
|
|
Example 30. Scheme Synthesis of N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)acetamide
[0304]

[0305] (Z)-5-((5-((1r,4r)-4-Aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (1.0 eq, 10 mg, 0.0196 mmol) and DIEA (1.2 eq, 4 ul, 0.0229
mmol) were dissolved in NMP (0.1 ml). Acetic anhydride (1.0 eq, 2 ul, 0.0211 mmol)
was added and the mixture stirred at room temperature overnight. Water was added and
the resulting precipitate was filtered and dried to provide N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)acetamide
as a solid (8 mg). LCMS (ES):>95% pure, m/z 439 [M+H]
+.
Example 31. Synthesis of 3-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5,a]pyrimidin-5-ylamino)cyclohexyl)-1,1-dimethylurea
2,2,2-trifluoroacetate
[0306]

[0307] (Z)-5-((5-((1r,4r)-4-Aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (10 mg) and DIEA (1.2 eq, 4.1 ul) were mixed in dry NMP (0.1
ml). Dimethylcarbamic chloride (1.0 eq, 1.8 ul) was added and the mixture stirred
at room temperature overnight. The reaction was diluted with NMP (1.5 ml) and a few
drops of water. The compound was purified by preparative HPLC and was isolated after
evaporation at the genevac. 3-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)-1,1-dimethylurea
2,2,2-trifluoroacetate. LCMS (ES):>95% pure, m/z 468 [M+H]
+. Z:E ratio: 86:13
[0308] The following molecules were prepared using similar chemistries to the ones described
in
Example 30 and
Example 31 using the appropriate amines and anhydrides or acyl chlorides, sulfamoyl chlorides,
sulfonyl chlorides or chloroformates. Compounds were purified by preparative HPLC,
isolated after genevac evaporation, and characterized by LCMS. Table 10B shows the
biological activities of the compounds listed in Table 10A.
Table 10B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| A3 |
<0.01 |
>2.5000 |
>30 |
>30 |
| B3 |
<0.1 |
0.5385 |
|
|
| C3 |
<0.01 |
0.6791 |
|
|
| D3 |
<0.01 |
0.476 |
|
|
| E3 |
<0.01 |
>2.5000 |
|
|
[0309] The following molecules in Table 10 were prepared using chemistries similar to the
ones in
Example 26,
Example 27,
Example 28 and
Example 29.

Example 32. Synthesis of tert-butyl 5-(benzylthio)-3-formylpyrazolo[1,5,a]pyrimidin-7-yl(cyclopropyl)carbamate
[0310]

[0311] Diisopropylethylamine (256 µL, 1.48 mmol) was added to
tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (250 mg, 0.74 mmol) suspended in ethanol (2.5
mL). Benzyl mercaptan (191 µL, 1.48 mmol) was added and the reaction was homogeneous
after ∼2 min. After 10 min, the reaction was diluted with ethanol (3 mL) and the precipitate
was filtered and washed with ethanol (10 mL) to yield
tert-butyl 5-(benzylthio)-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (148 mg, 47%). LCMS (ES): >95% pure, m/z 425
[M+1]
+.
Example 33. Synthesis of 5-((5-(benzylthio)-7-(cyclopropylamino)pyrazolo[1,5,a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0312]

[0313] Hydantoin (67 mg, 0.67 mmol) and piperidine (66 µL, 0.67 mmol) were added to
tert-butyl 5-(benzylthio)-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (95 mg, 0.22 mmol) dissolved in ethanol (1.1
mL). The reaction was heated at 80 °C. After 15 h, the reaction was cooled to r.t.,
diluted with water (5 mL), and the precipitate was collected and washed with 1:1 ethanol:water
(10 mL) and then ethanol (3 mL). The bright yellow solid was dried
in vacuo to give (
Z)-5-((5-(benzylthio)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (75 mg, 66%). LCMS (ES): >95% pure,
m/z 507 [M+1]
+.
[0314] 5-((5-(Benzylthio)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (60 mg, 0.15 mmol) was dissolved
in dichloromethane (1 mL) and trifluoroacetic acid (1 mL). After 1 h, the solution
was concentrated under a stream of air. The residue was triturated with Et
2O (3 mL) and the precipitate was collected to provide (
Z)-5-((5-(benzylthio)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione (59 mg, 98%). LCMS (ES): >95% pure,
m/z 407 [M+1]
+
Table 11.
| Structure |
LCMS m/z [M+1]+ |
CK2: IC50 (uM) |
PIM2: IC50 (5um ATP) |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |

|
407 |
<0.01 |
> 2.5000 |
> 30 |
11.037 |
Example 34. Synthesis of 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0315]

[0316] To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (440 mg,
1.86 mmol) in EtOH was added thiazolidine-2,4-dione (458 mg, 3.91 mmol) and piperidine
(208 µl, 2.05 mmol). The reaction was heated at 80°C overnight. To the reaction mixture,
isopropanol (3 mL) was added in the along with 218 mg thiazolidine-2,4-dione and 94µL
of piperidine. The temperature was increased to 90°C and the reaction was stirred
at that temperature overnight. The precipitate was filtered while hot and dissolved
in MeOH. To the reaction mixture, 1M HCl (1 mL) was added and the mixture sonicated.
The precipitate was filtered and washed with MeOH to yield 340 mg (54% yield) 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
as a yellow powder. LCMS (M+1=336)
Example 35. Synthesis of 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0317]

[0318] To 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
(20 mg, 0.06 mmol) in NMP was added 3-chloroaniline (38 µL, 0.36 mmol) and a few granules
of
p-toluenesulfonic acid. The reaction was heated in microwave at 180°C 1.5 hours. The
reaction mixture was filtered and purified by prep HPLC then prep TLC (1%MeOH/DCM)
to yield 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
as a yellow solid. LCMS (M+1=427)
Example 36. Synthesis of 5-((7-(cyclopropylamino)-5-(isobutylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0319]

[0320] To 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
(30 mg, 0.09 mmol) in NMP was added 2-methylpropan-1-amine (20 mg, 0.268 mmol). The
reaction was heated at 130°C overnight. The reaction mixture was diluted with MeOH
and purified by prep HPLC to yield 5-((7-(cyclopropylamino)-5-(isobutylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione.
LCMS (M+1=373)
[0321] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 36. All compounds were characterized by LCMS. Table 12B shows the biological activities
of the compounds listed in Table 12A.
Table 12B.
| Compound |
CK2: IC50 (µM) |
PIM1: IC50 (30 µM ATP) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| F3 |
<1.0 |
2.0638 |
1.6438 |
|
|
| G3 |
<0.1 |
2.0575 |
1.8456 |
7.7 |
9.45 |
| H3 |
<1.0 |
2.3875 |
> 2.5000 |
|
|
| I3 |
<0.1 |
> 2.5000 |
0.8759 |
|
|
| J3 |
<1.0 |
> 2.5000 |
> 2.5000 |
|
|
| K3 |
<1.0 |
0.9177 |
1.3934 |
|
|
| L3 |
<1.0 |
> 2.5000 |
1.4327 |
|
|
| M3 |
<0.1 |
1.4455 |
1.4379 |
|
|
| N3 |
<1.0 |
> 2.5000 |
> 2.5000 |
|
|
| O3 |
<0.1 |
1.2533 |
> 2.5000 |
|
|
| P3 |
<1.0 |
> 2.5000 |
> 2.5000 |
|
|
| Q3 |
<0.1 |
|
2.0461 |
|
|
| R3 |
<1.0 |
|
1.82 |
|
|
Example 37. Syntheses of tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0322]

[0323] To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (4.52 g,
19.15 mmol) in methylene chloride (80 mL) was added triethylamine (3.2 mL, 23 mmol),
dimethylaminopyridine (350 mg, 2.87 mmol), and di-t-butyldicarbonate (12.53 g, 57.44
mmol) The mixture was stirred at room temperature for 60 minutes. The reaction mixture
was transferred to a separatory funnel, washed 1X with H
2O, 2X with brine, dried over MgSO
4, filtered, and evaporated to dryness to provide an oily residue. The crude material
was purified by silica gel chromatography (0%-20% ethyl acetate/hexanes) to yield
5.68 g (88% yield) of tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl (cyclopropyl)carbamate.
LCMS (M+1=337)
Example 38. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0324]

[0325] To 5 tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl (cyclopropyl)carbamate
(650 mg, 1.93 mmol) in 14 mL of a 2:1 mixture of 1,2-dimethoxyethane/ EtOH was added
3-hydroxyphenyl boronic acid (399 mg, 2.89 mmol), tetrakis(triphenylphosphine)palladium(0)
(112 mg, 0.096 mmol), and 2M aqueous solution of Na
2CO
3 (2.9 mL, 5.79 mmol). The mixture was stirred at 85°C for 1h. The volatiles were removed
by rotary evaporation and the residue was purified by silica gel chromatography (0%-30%
EtOAc/Hexanes) to provide 400 mg of tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate.
(52%). LCMS (M+1=395)
Example 39. Synthesis of 7-(cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0326]

[0327] To tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
(400 mg, 1.01 mmol) in methylene chloride (20 mL) was added TFA (10 mL). The reaction
mixture was stirred at room temperature for 2 hours. The volatiles were removed by
rotary evaporation and the residue was purified by silica gel chromatography (0%-40%
EtOAc/hexanes) to provide 103 mg of 7-(cyclopropylamino)-5-(3hydroxyphenyl)pyrazolo
[1,5-a]pyrimidine-3-carbaldehyde. (35%). LCMS (M+1=295)
Example 40. Synthesis of 5-((7-(cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0328]

[0329] To 7-(cyclopropylamino)-5-(3hydroxyphenyl)pyrazolo [1,5-a]pyrimidine-3-carbaldehyde
(100 mg, 0.340 mmol) in EtOH (2 mL) was added piperidine (67 µL, 0.680 mmol), and
hydantoin (34 mg, 0.34 mmol). The reaction was stirred at 50°C overnight. The solid
formed was isolated by filtration to provide 70 mg of 5-((7-(cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
(55%). LCMS (M+1=377)
Synthsis of 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-2-fluorobenzoic
acid
[0331]

[0332] Same procedure as
[Example 38]. LCMS (M+1=441)
Example 41. Synthesis of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-2-fluorobenzoic
acid
[0333]

[0334] Same procedure as
[Example 39]. LCMS (M+1=341)
Example 42. Synthesis of 7-(cyclopropylamino)-5-(4-fluoro-3-(morpholine-4-carbonyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0335]

[0336] To 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-2-fluorobenzoic
acid (75 mg, 0.22 mmol 0 in DMF (3 mL) was added EDCI (46 mg, 0.24 mmol), HOBt (33
mg, 0.24 mmol), and morpholine (21 mg, 0.24 mmol). The reaction mixture was stirred
at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate
and washed 1X with saturated sodium bicarbonate, 2X with brine, dried over MgSO
4, filtered and evaporated to dryness to provide 92 mg of 7-(cyclopropylamino)-5-(4-fluoro-3-(morpholine-4-carbonyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
LCMS (M+1=410)
Example 43. Synthesis of 5-((7-(cyclopropylamino)-5-(4-fluoro-3-(morpholine-4-carbonyl)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0337]

[0338] Same procedure as
[Example 40]. LCMS (M+1=492)
[0339] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 42 and
Example 43. All compounds were characterized by LCMS. Table 14B shows the biological activities
of the compounds listed in Table 14A.
Table 14B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| D5 |
<0.1 |
> 2.5000 |
2.443 |
1.208 |
| E5 |
<0.1 |
> 2.5000 |
|
|
| F5 |
<0.01 |
> 2.5000 |
0.948 |
1.808 |
| G5 |
<0.01 |
> 2.5000 |
0.435 |
1.841 |
Example 44. Synthesis of tert-butyl cyclopropyl(5-(2-fluoropyridin-4-yl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0340]

[0341] To tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
(1 g, 3 mmol) in 29 niL of a 2:1 mixture of 1,2-dimethoxyethane/ EtOH was added 2-Fluoropyridine-4-boronic
acid (500 mg, 3.55 mmol), tetrakis(triphenylphosphine)palladium(0) (173 mg, 0.15 mmol),
and 2M aqueous solution of Na
2CO
3 (4.4 mL, 8.9 mmol). The mixture was stirred at 85°C for 8 hours. The volatiles were
removed by rotary evaporation and the residue was purified by silica gel chromatography
(35% EtOAc/Hexanes) to provide 324 mg tert-butyl cyclopropyl(5-(2-fluoropyridin-4-yl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
(28% yield). LCMS (M+1=398)
Example 45. Synthesis of 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0342]

[0343] To tert-butyl cyclopropyl(5-(2-fluoropyridin-4-yl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
(320 mg, 0.82 mmol) in methylene chloride (3 mL) was added TFA (3 mL). The reaction
mixture was stirred at room temperature for 1.5 hours. The volatiles were removed
by rotary evaporation and 1N NaOH was added to the residue to make basic. The precipitate
was collected by filtration, washed with water, and dried under vacuum to provide
180 mg of 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(74%). LCMS (M+1=298)
Example 46. Synthesis of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0344]

[0345] To 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
30 mg, 0.1 mmol) in EtOH (1 mL) was added piperdine (13 µL, 0.1 mmol), and thiazolidine-2,4-dione
(12 mg, 0.1 mmol). The reaction was stirred at 80°C for 2 hours. The solid formed
was isolated by filtration, washed with water then ethanol. The recovered solid was
further purified by washing with 20% methanol/dichloromethan to provide 9 mg of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyraxolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
(23%). LCMS (M+1=397)
[0346] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 44,
Example 45, and
Example 46. All compounds were characterized by LCMS. Table 15B shows the biological activities
of the compounds listed in Table 15A.
Table 15B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| H5 |
<0.1 |
0.8152 |
|
|
| I5 |
<1.0 |
0.2176 |
|
|
| J5 |
<1.0 |
0.1978 |
> 30 |
18.951 |
Example 47. Synthesis of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2-thioxothiazolidin-4-one
[0347]

[0348] To 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
30 mg, 0.1 mmol) in EtOH (1 mL) was added piperdine (13 µL, 0.1 mmol), and rhodanine
(13 mg, 0.1 mmol). The reaction was stirred at 80°C for 2 hours. The solid formed
was isolated by filtration, washed with water then ethanol. The recovered solid was
further purified by washing with 20% methanol/dichloromethan to provide 15 mg of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2-thioxothiazolidin-4-one
(35%). LCMS (M+1=413)
Table 16.
| Structure |
LCMS m/z [M+1]+ |
CK2: IC50 (uM) |
PIM2: IC50 (5um ATP) |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |

|
413 |
<1.0 |
1.5908 |
> 30 |
22.671 |
Example 48. Synthesis of tert-butyl 4-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
[0349]

[0350] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (896 mg, 4.8 mmol) was
added along with tert-butyl 4-aminopiperidine-1-carboxylate (954 mg, 4.8 mmol), triethylamine
(664 µL, 4.8 mmol), and acetonitrile(16 mL). The reaction was heated at 100°C for
12 hours then cooled to room temperature, diluted with water, filtered and washed
with water. The product, tert-butyl 4-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate,
was collected as a solid in quantitative yield and dried under vacuum overnight. LCMS
(M+1=352)
Example 49. Synthesis of tert-butyl 4-(5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
[0351]

[0352] To tert-butyl 4-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
(1.7 g, 4.8 mmol) in DMF (36 mL), POCl
3 (7.7 mL, 82.9 mmol) was added dropwise at room temperature. After the addition was
complete, the reaction was stirred for 8 hours. Then, the reaction was quenched by
slow addition to ice cold 6N NaOH. The mixture was diluted with water and the solid
was collected by filtration. The solid was washed several more times with water then
dried under vacuum overnight. The product, tert-butyl 4-(5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate,
was collected as a solid in 48% yield. LCMS (M+1=380)
Example 50. Synthesis of tert-butyl 4-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
[0353]

[0354] Tert-butyl 4-(5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
(876 mg, 2.3 mmol) was added to 1,4-dioxane (6 mL) along with 3-chloroaniline (1.5
mL, 13.9 mmol) and p-toluenesulfonic acid monohydrate (44 mg, 0.23 mmol). The reaction
was heated at 95°C for 12 hours then cooled to room temperature, diluted with water,
and filtered. The solid was washed with 1N NaOH followed with water then dried under
vacuum overnight. The product, tert-butyl 4-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate,
was collected after further purification by recrystallization from ethyl acetate/hexanes
(74% yield). LCMS (M+1=471)
Example 51. Synthesis tert-butyl 4-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
[0355]

[0356] To the reaction flask, tert-butyl 4-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
(811 mg, 1.7 mmol) was added to ethanol (6.3 mL) along with hydantoin (172 mg, 1.7
mmol) and piperidine (170 µL, 1.7 mmol). The reaction was heated at 80°C for 12 hours
then cooled to room temperature and diluted with water. The solid was collected by
filtration, washed with water and cold ethanol. The material was dried under vacuum
overnight. The product, tert-butyl 4-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate,
was recovered as a red solid in 67% yield after further purification by recrystallization
from ethyl acetate/hexanes. LCMS (M+1= 553)
Example 52. Synthesis 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0357]

[0358] Tert-butyl 4-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate
(640 mg, 1.2 mmol) was dissolved in 10 mL of TFA/DCM (1:1) and stirred at room temperature
for 1 hour then quenched by addition to ice cold 6N NaOH. The mixture was diluted
with water then the aqueous layer was decanted. The organic layer was diluted with
hexanes and filtered. The product, 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione,
was collected as a solid in quantitative yield. LCMS (M+1 = 453)
Example 53. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-(cyclopropanecarbonyl)piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0359]

[0360] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (30 mg, 0.066 mmol) in THF was added cyclopropyl
carbonyl chloride (5 µL, 0.04 mmol). The mixture was stirred at room temperature for
ten minutes. The reaction mixture was then concentrated, diluted with MeOH, and purified
by prep HPLC to yield 5-((5-(3-chlorophenylamino)-7-(1-(cyclopropanecarbonyl)piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=521)
Example 54. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-pivaloylpiperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0361]

[0362] Same procedure as
[Example 53]. LCMS(M+1=537)
Example 55. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-(3,3-dimelbutanoyl)piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0363]

[0364] Same procedure as
[Example 53]. LCMS (M+1=551)
Example 56. Synthesis of 4-(5-3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)-N,N-dimethylpiperidine-1-carboxamide
[0365]

[0366] Same procedure as
[Example 53]. LCMS (M+1=524).
Example 57. Synthesis of methyl 4-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)piperidin-1-carboxylate
[0367]

[0368] Same procedure as
[Example 53] except DME is used as solvent. LCMS (M+1=511)
Example 58. Synthesis of methyl 2-(4-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)piperidin-1-yl)acetate
[0369]

[0370] Same procedure as
[Example 53] except DMF is used as solvent. LCMS (M+1=525)
Example 59. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-(2-hydroxypropyl)piperidin-4-ylamino)pyzazolo[1,5-a]pyrimidin-3-yl)methylene)midazolidine-2,4-dione
[0371]

[0372] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(30 mg, 0.066 mmol) in DMF was added 1-chloro2-propanol (7 µL, 0.13 mmol) and potassium
iodide (11.0 mg,0.066 mmol). The mixture was heated to 120°C and stirred for overnight.
The reaction mixture was concentrated , diluted with MeOH, and purified by prep HPLC
to yield 5-((5-(3-chlorophenylamino)-7-(1-(2-hydroxypropyl)piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-done.
LCMS (M+1=511)
Example 60. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-(2-hydroxyethyl)piperidin-4-ylamino)pyrazolo[1,3-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0373]

[0374] Same procedure as
[Example 59]. LCMS (M+1=497)
Example 61. Synthesis-of 5-((5-(3-chlorophenylamino)-7-(1-(pyridin-2-ylmethyl)piperidin-4-ylamino)porazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0375]

[0376] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino)pyrazolo [1,5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (30 mg, 0.066 mmol) in DMF was added 2-(bromomethyl)
pyridine hydrogen bromide (26.0 mg, 0103 mmol). The mixture was stirred at room temperature
for 0.5 hour. The reaction mixture was concentrated, diluted with MeOH, and purified
by prep HPLC to yield 5-((5-(3-chlorophenylamino)-7-(1-(pyridin-2-ylmethyl)piperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene;)imidazolidine-2,4-dione.
LCMS (M+1=544)
Example 62. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-isopropylpiperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0377]

[0378] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (20 mg, 0.04 mmol) in THF and AcOH (4.8 mg, 0.08
mmol) was added acetone (2.0 mL, 0.2 mmol) and sodium triacetoxy borohydride (85.0
mg, 0.4 mmol)). The mixture was heated at 60°C for one hour. Saturated sodium bicarbonate
solution was added to the reaction mixture. The mixture was extracted with ethyl acetate
and dried over sodium sulfate. Then the mixture was , diluted with MeOH, and purified
by prep HPLC to yield 5-((5-(3-chlorophenylamino)-7-(1-isopropylpiperidin-4-ylammo)
pyrazolo [1, 5-a] pyrimidin-3-yl) methylene) imidazolidine-2, 4-dione. LCMS (M+1=495)
Example 63. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-ethylpiperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0379]

[0380] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (30 mg, 0.06 mmol) in THF and AcOH (4.8 mg, 0.08
mmol) was added acetaldehyde (2.0 mL, 0.2 mmol) and sodium triacetoxy borohydride
(85.0 mg, 0.4 mmol). The mixture was stirred at room temperature for 0.5 hour. The
reaction mixture was concentrated , diluted with MeOH, and purified by prep HPLC to
yield 5-((5-(3-chlorophenylamino)-7-(1-ethylpiperidin-4-ylamino)pyrazolo[1,5-a] pyrimidin-3-yl)
methylene) imidazolidine-2, 4-dione. LCMS (M+1=481)
Example 64. Synthesis of 5-((5-(3-chlorophenylamino)-7-(1-isobutylpiperidin-4-ylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0381]

[0382] To 5-((5-(3-chlorophenylamino)-7-(piperidin-4-ylamino)pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (30 mg, 0.06 mmol) in THF and AcOH (4.8 mg, 0.08
mmol) was added isobutryldehyde (2.2 mL, 0.2 mmol) and sodium triacetoxy borohydride
(85.0 mg, 0.4 mmol). The mixture was stirred at room temperature for 0.5 hour. The
mixture was concentrated, diluted with MeOH, and purified by prep HPLC to yield 5-((5-(3-chlorophenylamino)-7-(1-isobutylpiperidin-4-ylamino)
pyrazolo [1, 5-a] pyrimidin-3-yl) methylene) imidazolidine-2, 4-dione. LCMS (M+1=509)
[0383] The compounds described in the following table were prepared using chemistries similar
to those exemplified in the Examples described above. All compounds were characterized
by LCMS. Table 17B shows the biological activities of the compounds listed in Table
17A.
Table 17B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| K5 |
<0.1 |
2.4491 |
1.078 |
10.984 |
| L5 |
<0.01 |
> 2.5000 |
0.993 |
2.399 |
| M5 |
<0.1 |
> 2.5000 |
0.874 |
10.023 |
| N5 |
<0.1 |
> 2.5000 |
1.569 |
17.368 |
| O5 |
<0.1 |
2.4076 |
1.115 |
4.263 |
| P5 |
<0.1 |
> 2.5000 |
0.825 |
16.513 |
| Q5 |
<0.1 |
> 2.5000 |
|
|
| R5 |
<0.1 |
2.2046 |
|
|
| S5 |
<0.1 |
> 2.5000 |
|
|
| T5 |
<0.1 |
> 2.5000 |
|
|
| U5 |
<1.0 |
> 2.5000 |
|
|
| V5 |
<1.0 |
> 2.5000 |
|
|
| W5 |
<1.0 |
> 2.5000 |
|
|
Example 65. Synthesis of 7-(benzylthio)-5-chloropyrazolo[1,5-a]pyrimidine
[0384]

[0385] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (4.1 g, 22 mmol) was
added along with benzyl mercaptan (2.8 mL, 22 mmol), triethylamine (3.1 mL, 22 mmol),
and acetonitrile (71 mL). The reaction was stirred at room temperature for 3 hours
then diluted with water, filtered and washed with water. The product, 7-(benzylthio)-5-chloropyrazolo[1,5-a]pyrimidine,
was collected as a solid in 96% yield after drying under vacuum overnight.
LCMS(M+1-276)
Example 66. Synthesis of 7-(benzylthio)-N-(3-chlorophenyl)pyrazolo[1,5-a]pyrimidin-5-amine
[0386]

[0387] To the reaction flask, 7-(benzylthio)-5-chloropyrazolo[1,5-a]pyrimidine (3.45 g,
12.5 mmol) was added along with 3-chloroaniline (3.3 mL, 31.3 mmol), 4N HCl in dioxane
(3.1 mL, 1.2.5 mmol), and ethanol (42 mL). The reaction was stirred at reflux for
12 hours then cool to room temperature. Excess solvent was removed under vacuum and
the residue was diluted with water. The mixture was made basic with 3N NaOH, filtered
and washed with water. The product, 7-(benzylthio)-N-(3-chlorophenyl)pyrazolo[1,5-a]pyrimidin-5-amine,
was collected, as a solid in 90% yield after drying under vacuum overnight. LCMS (M+1=376)
Example 67. Synthesis of 7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0388]

[0389] To 7-(benzylthio)-N-(3-chlorophenyl)pyraxolo[1,5-a]pyrimidin-5-amine (4.1. g, 11.3
mmol) in DMF (42 mL), POCl
3 (6.3 mL, 67.6 mmol) was added dropwise at room temperature. After the addition was
complete, the reaction was stirred for 3 hours at room temperature. Then, the reaction
was quenched by slow addition to ice cold 6N NaOH. The mixture was diluted with water
and the solid was collected by filtration. The solid was washed several more times
with water then dried under vacuum overnight. The product, 7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde,
was collected as a solid in 83% yield. LCMS (M+1=395)
Example 68. Synthesis 5-((7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidme-2,4-dione
[0390]

[0391] To the reaction flask, 7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(3.7 g, 9.3 mmol) was added to ethanol (31 mL) along with hydantoin (933 mg, 9.3 mmol)
and piperidine (920 µL, 9.3 mmol). The reaction was heated at 80°C for 3 days then
cooled to room temperature and diluted with water. The solid was collected by filtration,
washed with water, 50% ethanol/water, and then 100% ethanol. The material was dried
under vacuum overnight. The product, 5-((7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione,
was recovered as a yellow solid in 92% yield. LCMS (M+1 = 477)
Example 69. Synthesis of 5-((7-(benzylsufinyl)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0392]

[0393] To the reaction flask, 5-((7-(benzylthio)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyimidin-3-yl)methylene)imidazolidine-2,4-dione
(4.1 g, 8.6 mmol) was added to dichloromethane (86 mL) along with m-chloroperbenzoic
acid (5.9g, 34.4 mmol). The mixture was allowed to stir at room temperature for 12
hours. The solid was collected by filtration, washed with dichloromethane then dried
under vacuum overnight. The product, 5-((7-(benzylsulfinyl)-5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidaxolidine-2,4-dione,
was recovered as a bright yellow solid in quantitative yield. LCMS (M+1= 493)
[0394] The compounds described in the following table were prepared using chemistries similar
to those exemplified in the Examples described above. All compounds were characterized
by LCMS. Table 18B shows the biological activities of the compounds listed in Table
18A.
Table 18B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| X5 |
<1.0 |
2.2449 |
|
|
| Y5 |
<1.0 |
0.2913 |
|
|
| Z5 |
<1.0 |
0.2968 |
|
|
| A6 |
<0.1 |
0.209 |
|
|
Example 70. Synthesis of 5-((5-(3-chlorophenylamino)-7-(2-hydroxyethyl amino)pyrazolo[1,5-a]purimidin-3-yl)methylene)imidazolidine-2,4-dione
[0395]

[0396] To 5-((7-(benzylsulfinyl)-5-(3-chlorophenylamino)pyrazolo [1,5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (15 mg, 0.0304 mmol) in NMP was added 2-aminoethanol
(14.6 µL, 0.242 mmol). The mixture was heated in the microwave at 120 °C for 20 minutes.
Water was added to the reaction mixture and the precipitate was collected by filtration.
The precipitate was washed with methanol to yield 5-((5-(3-chlorophenylamino)-7-(2-hydroxyethylamino)
pyrazolo [1, 5-a] pyrimidim-3-yl) methylene) imidazolidine-2,4-dione LCMS (M+1=414).
Similar products (shown bellow) were also obtained as precipitates by addition of
water while other reactions were purified by prep HPLC to yield corresponding products.
Example 71. Synthesis of 5-((5-(3-chlorophenylaminol-7-(pyridin-3-ylmethylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylenel)imidazolidine-2,4-dione
[0397]

[0398] Same procedure as
[Example 70]. LCMS (M+1=461)
Example 72. Synthesis 5-((5-(3-chlorophenylamino)-7-(pyridin-4-ylmethylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0399]

[0400] Same procedure as
[Example 70]. LCMS (M+1=461)
Example 73. Synthesis 5-((5-(3-chlorophenylamino)-7-(2-(dimethylamino)ethyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0401]

[0402] Same procedure as
[Example 70]. LCMS (M+1=441)
Example 74. Synthesis of 5-((5-(3-chlorophenylamino)-7-(isopropyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0403]

[0404] Same procedure as
[Example 70]. LCMS (M+1=412)
Example 75. Synthesis of 5-((5-(3-chlorophenylamino-7-(2-hydroxy propylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0405]

[0406] Same procedure as
[Example 70]. LCMS (M+1=428)
Example 76. Synthesis of 5-((5-(3-chlorophenylamino)-7-(cyclobutyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0407]

[0408] Same procedure as
[Example 70]. LCMS (M+1=424)
Example 77. Synthesis of 5-((5-(3-chlorophenylamino)-7-(2-morpholinoethyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0409]

[0410] Same procedure as
[Example-70]. LCMS (M+1=483)
Example 78. Synthesis 5-((5-(3-chlorophenylamino)-7-(pyridin-2-ylmethyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0411]

[0412] Same procedure as
[Example 70]. LCMS (M+1=461)
Example 79. Synthesis of 5-((5-(3-chlorophenylamino)-7-(3-dimethylamino)2,2-dimethylpropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0413]

[0414] Same procedure as
[Example 70]. LCMS (M+1=483)
Example 80. Synthesis tert-butyl 2-(5-(3-chlorophenylamino)-3-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)methyl)pyrrolidine-1-carboxylate
[0415]

[0416] Same procedure as
[Example 70]. LCMS (M+1=553)
Example 81. Synthesis of tert-butyl 4-((5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)methyl)piperidine-1-carboxylate
[0417]

[0418] Same procedure as
[Example 70]. LCMS (M+1=568)
Example 82. Synthesis of 5-((5-(3-chlorophenylamino)-7-(2,2,2-trifluoroethyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0419]

[0420] Same procedure as
[Example 70]. LCMS (M+1=452)
Example 83. Synthesis of 5-((7-(1H-pyrazol-3-ylamino)-5-(3-chlorophenyl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0421]

[0422] Same procedure as
[Example 70]. LCMS (M+1=436)
Example 84. Synthesis 5-((5-(3-chorophenylamino-7-(pyrrolidin-3-yl amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0423]

[0424] Same procedure as
Example 70. LCMS (M+1=439)
[0425] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 70. All compounds were characterized by LCMS. Table 19B shows the biological activities
of the compounds listed in Table 19A.
Table 19B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| B6 |
<1.0 |
0.3426 |
10.519 |
>30 |
| C6 |
<1.0 |
0.469 |
1.144 |
3.803 |
| D6 |
<1.0 |
0.4747 |
0.717 |
1.923 |
| E6 |
<1.0 |
1.3345 |
|
|
| F6 |
<0.1 |
> 2.5000 |
|
|
| G6 |
<1.0 |
> 2.5000 |
|
|
| H6 |
<1.0 |
0.4211 |
|
|
| I6 |
<1.0 |
0.7041 |
0.708 |
2.559 |
| J6 |
<1.0 |
> 2.5000 |
|
|
| K6 |
<1.0 |
0.3165 |
0.936 |
3.159 |
| L6 |
<2.0 |
2.1905 |
|
|
| M6 |
<1.0 |
> 2.5000 |
|
|
| N6 |
<0.1 |
> 2.5000 |
|
|
| O6 |
<0.01 |
> 2.5000 |
1.145 |
>30 |
| P6 |
<1.0 |
0.7008 |
0.569 |
1.618 |
| Q6 |
<1.0 |
1.2876 |
|
|
| R6 |
<1.0 |
1.1213 |
|
|
| S6 |
<0.1 |
|
|
|
| T6 |
<0.1 |
|
|
|
| U6 |
<1.0 |
0.5149 |
|
|
| V6 |
<0.1 |
|
|
|
| W6 |
<1.0 |
|
|
|
| X6 |
<1.0 |
|
|
|
| Y6 |
<0.1 |
|
|
|
| Z6 |
<0.1 |
|
|
|
| A7 |
<0.1 |
|
|
|
Example 85. Synthesis of tert-butyl 3-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
[0426]

[0427] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (1.6 g, 8.2 mmol) was
added along with tert-butyl 3-aminobenzoale (1.7 g, 8.7 mmol), triethylamine (1.2
mL, 8.6 mmol), and t-butyl alcohol (22 mL). The reaction was heated at 100°C for 6
hours then diluted with water, filtered and washed with water. The product, tert-butyl
3-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate, was collected as a solid in
quantitative yield after drying under vacuum overnight. LCMS (M+1= 345)
Example 86. Synthesis of tert-butyl 3-(5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
[0428]

[0429] To the reaction flask, tert-butyl 3-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
(2.9 g, 8.2 mmol) was added along with 3-chloroaniline (2.2 mL, 20.6 mmol), 4N HCl
in dioxane (2.6 mL, 10.4 mmol), and t-butyl alcohol (41 mL). The reaction was stirred
at 100°C for 2 days then cooled to room temperature. The mixture was diluted with
water, made basic with 3N NaOH, filtered and washed with water. The product, tert-butyl
3-(5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate, was collected
as a solid in 55% yield after drying under vacuum overnight. LCMS (M+1= 436)
Example 87. Synthesis of tert-butyl 3-(5-(3-chlorophenylamino-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
[0430]

[0431] To tert-butyl 3-(5-(3-chlorophenylamino)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
(965 mg, 2.2 mmol) in DMF (8.2 mL), POCl
3 (1.2 mL, 13.3 mmol) was added dropwise at room temperature. After the addition was
complete, the reaction was stirred for 3 days at room temperature. Then, the reaction
was quenched by slow addition to ice cold 6N NaOH. The mixture was diluted with water
and the solid was collected by filtration. The solid was washed several more times
with water then dried under vacuum overnight. The product, tert-butyl 3-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate,
was collected as a solid in 12% yield after purification by column chromatography
on silica using 5% acetone/dichloromethane as the eluent. LCMS (M+1= 464)
Example 88. Synthesis of tert-butyl 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
[0432]

[0433] To the reaction flask, tert-butyl. 3-(5-(3-chlorophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
(122 mg, 0.3 mmol) was added to ethanol (1.3 mL) along with hydantoin (26 mg, 0.3
mmol) and piperidine (26 µL, 0.3 mmol). The reaction was heated at 80°C for 2 hours
in the microwave then cooled to room temperature and diluted with water. The solid
was collected by filtration, washed with water, 50% ethanol/water, and then 100% ethanol.
The material was dried under vacuum overnight. The product, tert-butyl 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate,
was recovered as a solid in 69% yield. LCMS (M+1= 546)
Example 89. Synthesis of 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoic
acid
[0434]

[0435] Tert-butyl 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoate
(97 mg, 0.2 mmol) was dissolved in 2 mL of TFA/DCM (1:1) and stirred at room temperature
for 1 hour. Excess solvent and TFA were removed by evaporation under a stream of nitrogen.
The residue was diluted with water then the mixture was filtered. The product, 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoic
acid, was collected as a solid in 85% yield. LCMS (M+1= 490)
Example 90. Synthesis of tert-butyl 4-(3-(5-(3-chlorophenylamino)3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoyl)piperazine-1-carboxylate
[0436]

[0437] To the reaction flask, 3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoic
acid (30 mg, 0.06 mmol) was added to DMF (0.5 mL) along with HOBt (9.2 mg, 0.06 mmol),
triethylamine (8.4 µL, 0.06 mmol) and tert-butyl piperazine-1 -carboxylate (11.2 mg,
0.06 mmol). The reaction mixture was stirred at room temperature for 5 minutes then
EDC (11.5 mg, 0.06 mmol) was added. The reaction was allowed to stir for an additional
hour then diluted with water and filtered. The recovered solid was washed with more
water followed by ethanol. The product, tert-butyl 4-(3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoyl)piperazine-1-carboxylate,
was collected as a solid in 73% yield.
LCMS (M+1 = 658)
Example 91. Synthesis of 5-((5-(3-chlorophenylamino)-7-(3-(piperazine-1-carbonyl)phenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0438]

[0439] Tert-butyl 4-(3-(5-(3-chlorophenylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-7-ylamino)benzoyl)piperazine-1-carboxylate
(27 mg, 0.04 mmol) was dissolved in 2 mL of TFA/DCM (1:1) and stirred at room temperature
for 1 hour. Excess solvent and TFA were removed by evaporation under a stream of nitrogen.
The residue was diluted with water then the mixture was filtered. The recovered solid
was washed with water followed by 50% ethanol. The product, 5-((5-(3-chlorophenylamino)-7-(3-(piperazine-1-carbonyl)phenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2;4-dione,
was collected as a solid in 21% yield. LCMS (M+1 = 558)
Example 92. Synthesis of 5-((5-(3-chlorophenylamino)-7-(3-(3-dimethylamino)pyrrolidine-1-carbonyl)phenylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0440]

[0441] Same procedure as
[Example 90]. LCMS (M+1=586)
[0442] The compounds described in the following table were prepared using chemistries similar
to those exemplified in the Examples described above. All compounds were characterized
by LCMS. Table 20B shows the biological activities of the compounds listed in Table
20A.
Table 20B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| B7 |
<0.01 |
> 2.5000 |
7.773 |
10.204 |
| C7 |
<0.01 |
1.4446 |
6.435 |
> 30 |
| D7 |
<0.1 |
> 2.5000 |
14.229 |
> 30 |
| E7 |
<0.01 |
2.0193 |
0.364 |
3.006 |
| F7 |
<0.01 |
1.2348 |
1.587 |
13.969 |
Example 93. Synthesis of 3-((7-chloropyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
[0443]

[0444] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (452 mg, 2.4 mmol) was
added along with (3-cyanobenzyl)zinc(II) bromide (6 mL, 3.75 mmol, 0.625M in DMF),
Pd(PPh
3)
4 (110 mg, 0.1 mmol), and DMF (10 mL). The reaction was heated at 60°C for 4 hours
then cooled to room temperature. The reaction mixture was poured into saturated aqueous
NH
4Cl solution and ice and extracted with ethyl acetate. The combined extracts were washed
with water, saturated NaCl solution, and then dried over Na
2SO
4. The solvent was removed
in vacuo and the residue was purified by column chromatography on silica using 35% ethyl acetate/hexanes
as the eluent. The product, 3-((7-chloropyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile,
was recovered in 64% yield. LCMS (M+1= 269)
Example 94. Synthesis of 3-((7-cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
[0445]

[0446] To the reaction flask, 3-((7-chloropyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
(400 mg, 1.5 mmol) was added along with cyclopropylamine (115 µL, 1.6 mmol), triethylamine
(230 µL, 1.6 mmol), and acetonitrile (3 mL). The reaction was stirred at room temperature
for 8 hours at 80°C then cooled to room temperature, diluted with water, filtered
and washed with water. The product, 3-((7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile,
was collected as a solid in 83% yield after drying under vacuum overnight. LCMS (M+1=290)
Example 95. Synthesis of 3-((7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
[0447]

[0448] To 3-((7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile (69
mg, 0.24 mmol) in DMF (0.6 mL), POCl
3 (130 µL, 1.4 mmol) was added at room temperature. After the addition was complete,
the reaction was stirred for 1 hour at room temperature. Then, the reaction was quenched
by addition to ice cold 6N NaOH. The mixture was diluted with water and the solid
was collected by filtration. The solid was washed several more times with water then
dried under vacuum overnight. The product, 3-((7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile,
was collected as a solid in 37% yield. LCMS (M+1= 318)
Example 96. Synthesis of 3-((7-(cyclopropylamino)-3-((2 5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
[0449]

[0450] To the reaction flask, 3-((7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile
(28 mg, 0.09 mmol) was added to ethanol (0.5 mL) along with hydantoin (9 mg, 0.09
mmol) and piperidine (9 µL, 0.09 mmol). The reaction was heated at 80°C for 30 minutes
in the microwave then cooled to room temperature and diluted with water. The solid
was collected by filtration, washed with water, 50% ethanol/water, and then 1000%
ethanol. The material was dried under vacuum overnight. The product, 3-((7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)methyl)benzonitrile,
was recovered as a solid in 34% yield. LCMS (M+1 = 400)
Table 21.
| Structure |
LCMS m/z [M+1]+ |
CK2: IC50 (uM) |
PIM2: IC50 (Sum ATP) |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |

|
400 |
<0.01 |
> 2.5000 |
> 30 |
19.66 |
Example 97. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0451]

[0452] To tert-butyl. 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl (cyclopropyl)carbamate
(650 mg, 1.93 mmol) in 14 mL of a 2:1 mixture of 1,2-dimethoxyethane/EtOH was added
3-hydroxyphenyl boronic acid (399 mg, 2.89 mmol), tetrakis(triphenylphosphine)palladium(0)
(112 mg, 0.096 mmol), and 2M aqueous solution of Na
2CO
3 (2.9 mL, 5.79 mmol). The mixture was stirred at 85°C for 1h. The volatiles were removed
by rotary evaporation and the residue was purified by silica gel chromatography (0%-30%
EtOAc/Hexanes) to provide 400 mg of tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate.
(52%). LCMS (M+1=395)
Example 98. Synthesis of 7-cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0453]

[0454] To tert-butyl cyclopropyl(3-formyl-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
(400 mg, 1.01 mmol) in methylene chloride (20 mL) was added TFA (10 mL). The reaction
mixture was stirred at room temperature for 2h. The volatiles were removed by rotary
evaporation and the residue was purified by silica gel chromatography (0%-40% EtOAc/hexanes)
to provide 103 mg of 7-(cyclopropylamino)-5-(3hydroxyphenyl)pyrazolo [1,5-a]pyrimidine-3-carbaldehyde.
(35%). LCMS (M+1=295)
Example 99. Synthesis of 5-((7-(cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0455]

[0456] To 7-(cyclopropylamino)-5-(3hydroxyphenyl)pyrazolo [1,5-a]pyrimidine-3-carbaldehyde
(100 mg, 0.34 mmol) in EtOH (2 mL) was added piperidine (67 µL, 0.68 mmol), and Hydantoin
(34 mg, 0.34 mmol)). The reaction was stirred at 50°C overnight. The solid formed
was isolated by filtration to provide 70 mg of 5-((7-(cyclopropylamino)-5-(3-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(55%). LCMS (M+1=377)
Example 100. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0457]

[0458] Same procedure as
[Example 97]. LCMS (M+1=463)
Example 101. Synthesis of 7-(cyclopropylamino)-5-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0459]

[0460] Same procedure as
[Example 98]. LCMS (M+1=363)
Example 102. Synthesis of 5-((7-(cyclopropylamino)-5-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0461]

[0462] Same procedure as
[Example 99]. LCMS (M+1=445)
Example 103. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-(hydroxymethyl)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0463]

[0464] Same procedure as
[Example 97]. LCMS (M+1 = 409)
Example 104. Synthesis of 7-(cyclopropylamino)-5-(3-(hydroxymethyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0465]

[0466] Same procedure as
[Example 98]. LCMS (M+1= 309)
Example 105. Synthesis of 5-((7-(cyclopropylamino)-5-(3-(hydroxymethyl)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0467]

[0468] Same procedure as
[Example 99]. LCMS (M+1= 391)
Example 106. Synthesis of methyl 3-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)benzoate
[0469]

[0470] Same procedure as
[Example 97]. LCMS (M+1= 437)
Example 107. Synthesis of methyl 3-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)benzoate
[0471]

[0472] Same procedure as
[Example 98]. LCMS (M+1= 337)
Example 108. Synthesis of methyl 3-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)benzoate
[0473]

[0474] Same procedure as
[Example 99]. LCMS (M+1=419)
Example 109. Synthesis of methyl tert-butyl cyclopropyl(3-formyl-5-(3-(methylsulfonyl)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0475]

[0476] Same procedure as
[Example 97] . LCMS (M+1= 457)
Example 110. Synthesis of 7-(cyclopropylamino)-5-(3-(methylsulfonyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0477]

[0478] Same procedure as
[Example 98]. LCMS (M+1= 357)
Example 111. Synthesis of 5-((7-(cyclopropylamino)-5-3-(methylsulfonyl)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0479]

[0480] Same procedure as
[Example 99]. LCMS (M+1= 439)
Example 112. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-(N-methylsulfamoyl)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0481]

[0482] Same procedure as
[Example 97]. LCMS (M+1= 472)
Example 113. Synthesis of 3-(7-(cyclopropylamino)-3-formylpyrazalo[1,5-a]pyrimidin-5-yl)-N-methylbenzenesulfonamide
[0483]

[0484] Same procedure as [
Example 98]. LCMS (M+1= 372)
Example 114. Synthesis of 3-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)-N-methylbenzenesulfonamide
[0485]

[0486] Same procedure as
[Example 99]. LCMS (M+1= 454)
Example 115. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-(methylsulfonamido)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0487]

[0488] Same procedure as
[Example 97]. LCMS (M+1= 472)
Example 116. Synthesis of N-(3-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)phenyl)methanesulfonamide
[0489]

[0490] Same procedure as
Example 98]. LCMS (M+1= 372.)
Example 117. Synthesis of N-(3-(7-cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)phenyl)methanesulfonamide
[0491]

[0492] Same procedure as
[Example 99]. LCMS (M+1 = 454)
Example 118. Synthesis of tert-butyl cyclopropyl(5-(3-(dimethylamino)phenyl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0493]

[0494] Same procedure as
[Example 97]. LCMS (M+1= 422)
Example 119. Synthesis of 7-(cyclopropylamino)-5-(3-(dimethylamino)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0495]

[0496] Same procedure as
[Example 98]. LCMS (M+1= 322.)
Example 120. Synthesis of 5-((7-cyclopropylamino)-5-(3-(dimethylamino)phenyl)-pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0497]

[0498] Same procedure as
[Example 99]. LCMS (M+1= 404)
Example 121. Synthesis of tert-butyl 5-(3-cyanophenyl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0499]

[0500] Same procedure as
[Example 97]. LCMS (M+1= 404)
Example 122. Synthesis of 3-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin- 5-yl)benzonitrile
[0501]

[0502] Same procedure as
[Example 98]. LCMS (M+1= 304)
Example 123. Synthesis of 3-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)benzonitrile
[0503]

[0504] Same procedure as
[Example 99]. LCMS (M+1=386)
Example 124. Synthesis of tert-butyl cyclopropyl(5-(3-fluorophenyl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0505]

[0506] Same procedure as
[Example 99]. LCMS (M+1= 397)
Example 125. Synthesis of 7-(cyclopropylamino)-5-(3-fluorophenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0507]

[0508] Same procedure as
[Example 98]. LCMS (M+1= 297)
Example 126. Synthesis of 5-((7-(cyclopropylamino)-5-(3-fluorophenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0509]

[0510] Same procedure as
[Example 99]. LCMS (M+1= 379)
Example 127. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(pyridin-3-yl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0511]

[0512] Same procedure as
[Example 97]. LCMS (M+1= 380)
Example 128. Synthesis of 7-(cyclopropylamino)-5-(pyridin-3-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0513]

[0514] Same procedure as
[Example 98]. LCMS (M+1=280)
Example 129. Synthesis of 5-((7-(cyclopropylamino)-5-(pyridin-3-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0515]

[0516] Same procedure as
[Example 99]. LCMS (M+1= 362)
Example 130. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(pyridin-4-yl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0517]

[0518] Same procedure as
[Example 97]. LCMS (M+1=380)
Example 131. Synthesis of 7-(cyclopropylamino)-5-(pyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0519]

[0520] Same procedure as
[Example 98]. LCMS (M+1= 280)
Example 132. Synthesis of 5-((7-(cyclopropylamino)-5-(pyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl]methylene)imidazolidine-2,4-dione
[0521]

[0522] Same procedure as
[Example 99]. LCMS (M+1= 362)
Example 133. Synthesis of tert-butyl cyclopropyl(5-(2-fluoropyridin-4-yl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0523]

[0524] Same procedure as
[Example 97]. LCMS (M+1 = 398)
Example 134. Synthesis of 7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0525]

[0526] Same procedure as
[Example 98]. LCMS (M+1=298)
Example 135. Synthesis of 5-((7-(cyclopropylamino)-5-(2-fluoropyridin-4-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0527]

[0528] Same procedure as
[Example 99]. LCMS (M+1= 380)
Example 136. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(4-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0529]

[0530] Same procedure as
[Example 97]. LCMS (M+1=395)
Example 137.Synthesis of 7-(cyclopropylamino)-5-(4-hydroxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0531]

[0532] Same procedure as
[Example 98]. LCMS (M+1=295)
Example 138. Synthesis of 5-((7-cyclopropylamino)-5-(4-hydroxyphenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0533]

[0534] Same procedure as
[Example 99]. LCMS (M+1=377)
Example 139. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-(morpholinomethyl)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0535]

[0536] Same procedure as
[Example 97]. LCMS (M+1= 478)
Example 140. Synthesis of 7-(cyclopropylamino)-5-(3-(morpholinomethyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0537]

[0538] Same procedure as
[Example 98]. LCMS (M+1= 378)
Example 141. Synthesis of 5-((7-(cyclopropylamino)-5-(3-(morpholinomethyl)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0539]

[0540] Same procedure as
[Example 99]. LCMS (M+1= 460)
Example 142. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(3-((4-methylpiperazin-1-yl)methyl)phenyl)pyrazolo[1,5-a]pyrimidin-7-yl)carbamate
[0541]

[0542] Same procedure as
[Example 97]. LCMS (M+1=491)
Example 143. Synthesis of 7-(cyclopropylamino)-5-(3-((4-methylpiperazin-1-yl)methyl)phenyl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0543]

[0544] Same procedure as
[Example 98]. LCMS (M+1=391)
Example 144. Synthesis of 5-((7-(cyclopropylamino)-5-(3-((4-methylpiperazin-1-yl)methyl)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0545]

[0546] Same procedure as
[Example 99]. LCMS (M+1= 473)
Example 145. Synthesis of tert-butyl 5-(3-(acetamidomethyl)phenyl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0547]

[0548] Same procedure as
[Example 97]. LCMS (M+1= 450)
Example 146. Synthesis of N-(3-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)benzyl)acetamide
[0549]

[0550] Same procedure as
[Example 98]. LCMS (M+1 = 350)
Example 147. Synthesis of N-(3-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)benzyl)acetamide
[0551]

[0552] Same procedure as
[Example 99]. LCMS (M+1= 432)
Example 148. Synthesis of 5-(3-(aminomethyl)phenyl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0553]

[0554] To tert-butyl 5-(3-(acetamidomethyl)phenyl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
(50 mg, 0.111 mmol) was added 1 mL of 4M HCl in 1,4-dioxane and 1 ml of H
2O. The reaction mixture was stirred at 80° C for 16 hours then cooled to room temperature
and diluted with H
2O. To the reaction mixture, 5M NaOH was added to adjust pH to >10 then the mixture
was extracted with CH
2Cl
2. The organic layer was collected, dried over MgSO
4, filtered and evaporated to dryness to provide 24 mg of 5-(3-(aminomethyl)phenyl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(70%). LCMS (M+1=308)
Example 149. Synthesis of 5-((5-(3-aminomethyl)phenyl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0555]

[0556] Same procedure as
[Example 99]. LCMS (M+1 = 390)
[0557] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 98 and
Example 99. All compounds were characterized by LCMS. Table 22B shows the biological activities
of the compounds listed in Table 22A.
Table 22B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| G7 |
<0.01 |
0.6135 |
0.33 |
10.627 |
| H7 |
<0.01 |
0.8908 |
0.402 |
1.541 |
| I7 |
<0.01 |
> 2.5000 |
3.743 |
3.68 |
| J7 |
<0.01 |
0.6492 |
0.477 |
5.171 |
| K7 |
<0.01 |
> 2.5000 |
1.709 |
2.054 |
| L7 |
<0.01 |
> 2.5000 |
0.517 |
13.111 |
| M7 |
<0.1 |
> 2.5000 |
|
|
| N7 |
<0.01 |
2.2144 |
0.284 |
2.916 |
| O7 |
<0.01 |
> 2.5000 |
> 30 |
> 30 |
| P7 |
<0.01 |
2.1685 |
7.866 |
7.907 |
| Q7 |
<0.1 |
2.4032 |
1.494 |
3.279 |
| R7 |
<0.01 |
> 2.5000 |
1.054 |
23.617 |
| S7 |
<0.01 |
> 2.5000 |
1.174 |
11.78 |
| T7 |
<0.01 |
> 2.5000 |
1.298 |
6.592 |
| U7 |
<0.01 |
> 2.5000 |
1.153 |
1.191 |
| V7 |
<0.01 |
> 2.5000 |
1.964 |
14.486 |
| W7 |
<0.1 |
> 2.5000 |
0.683 |
1.898 |
| X7 |
<0.01 |
0.867 |
4.746 |
> 30 |
| Y7 |
<0.1 |
1.3082 |
1.938 |
2.578 |
| Z7 |
<0.01 |
1.4748 |
1.79 |
0.725 |
| A8 |
<0.01 |
1.2497 |
> 30 |
14.347 |
| B8 |
<0.01 |
> 2.5000 |
> 30 |
12.535 |
| C8 |
<0.01 |
> 2.5000 |
17.123 |
1.232 |
| D8 |
<0.01 |
0.0754 |
5.276 |
0.549 |
| E8 |
<0.01 |
> 2.5000 |
11.733 |
> 30 |
| F8 |
<0.01 |
0.2562 |
1.068 |
0.745 |
| G8 |
<0.01 |
0.0487 |
14.882 |
10.61 |
| H8 |
<0.01 |
> 2.5000 |
20.012 |
4.608 |
| I8 |
<0.1 |
> 2.5000 |
1.706 |
2.744 |
| J8 |
<0.01 |
> 2.5000 |
1.263 |
8.129 |
| K8 |
<0.1 |
> 2.5000 |
12.417 |
> 30 |
| L8 |
<0.01 |
2.084 |
12.278 |
> 30 |
| M8 |
<0.01 |
1.7271 |
> 30 |
> 30 |
| N8 |
<0.01 |
> 2.5000 |
1.979 |
2.253 |
| O8 |
<0.01 |
> 2.5000 |
15.69 |
29.035 |
| P8 |
<0.01 |
|
0.948 |
1.742 |
| Q8 |
<0.01 |
> 2.5000 |
26.74 |
5.426 |
| R8 |
<1.0 |
> 2.5000 |
|
|
Example 150. Synthesis of methyl 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylate
[0558]

[0559] Same procedure as
[Example 97]. LCMS (M+1= 443)
Example 151. Synthesis of methyl 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylate
[0560]

[0561] Same procedure as
[Example 98]. LCMS (M+1=343)
Example 152. Synthesis of methyl 5-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)prazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylate
[0562]

[0563] Same procedure as
[Example 99]. LCMS (M+1=425)
Example 153. Synthesis of tert-butyl 5-(5-cyanothiophen-2-yl)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0564]

[0565] Same procedure as
[Example 97]. LCMS (M+1= 410)
Example 154. Synthesis of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carbonitrile
[0566]

[0567] Same procedure as
[Example 98]. LCMS (M+1= 310)
Example 155. Synthesis of 5-(7-(cyclopropylamino)3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carbonitrile
[0568]

[0569] Same procedure as
[Example 99]. LCMS (M+1 = 392)
Example 156. Synthesis of 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-thiophene-2-carboxylic
acid
[0570]

[0571] To tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl (cyclopropyl)carbamate
(1 g, 2.97 mmol) in 30 mL of a 2:1 mixture of 1,2-dimethoxyethane/ EtOH was added
2-carboxythiophene-5- boronic acid (766 mg, 4.45 mmol), tetrakis(triphenylphosphine)palladium(0)
(171 mg, 0.148 mmol), and 2M aqueous solution of Na
2CO
3 (4.45 mL, 8.91 mmol). The mixture was stirred at 95°C for 3 hours then cooled to
room temperature and partitioned between 2N NaOH and ethyl acetate. The layers were
separated and the aqueous layer was acidified to pH<3 with conc. HCl. The aqueous
layer was extracted (3x) with methylene chloride. The combined organic layers was
washed with brine, dried over MgSO
4, filtered, and evaporated to dryness to provide 450 mg of 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid. Some additional material which was in the first ethyl acetate layer was purified
by silica gel chromatography (0%-20% MeOH/CH
2Cl
2) to provide another 550 mg of 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid (79%). LCMS (M+1=429)
Example 157. Synthesis of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid
[0572]

[0573] To 5-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid (1 g, 2.33 mmol) was added 8 mL of 4M HCl in dioxane and another 5 mL of dioxane.
The reaction mixture was stirred at 80° C for 2 hours, cooled to room temperature
and partitioned between CH
2Cl
2 and H
2O. The emulsion that formed between the layers was filtered off and rinsed with H
2O. The recovered solid was dried under vacuum to provide 627 mg of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid as a red solid (82%). LCMS (M+1=329)
Example 158. Synthesis of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-N-(3-methoxypropyl)thiophene-2-carboxamide
[0574]

[0575] To 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid (30 mg, 0.091 mmol), EDCI (19 mg, 0.10 mmol), Et
3N (14 µL, 0.10 mmol), and HOBt (14 mg, 0.10 mmol) in 2 mL of DMF pre-stirred for 5
minutes was added 3-methoxypropylamine (10 µL, 0.10 mmol). The reaction mixture was
stirred at room temperature for 1 hour. The reaction was diluted with ethyl acetate,
washed with H
2O, brine, dried over MgSO
4, filtered, and evaporated to dryness to provide 30 mg of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-N-(3-methoxypropyl)thiophene-2-carboxamide
(83%). LCMS (M+1=400)
Example 159. Synthesis of 5-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)-N-(3-methoxypropyl)thiophene-2-carboxamide
[0576]

[0577] To 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)-N-(3-methoxypropyl)thiophene-2-carboxamide
(30 mg, 0.075 mmol) in EtOH (1 mL) was added piperdine (20 µL, 0.150 mmol), and hydantoin
(10 mg, 0.075 mmol). The reaction mixture was stirred at 85°C for 3 hours. The solid
formed was isolated by filtration to provide 5-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)-N-(3-methoxypropyl)thiophene-2-carboxamide.
LCMS (M+1=482)
Example 160. Synthesis of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxamide
[0578]

[0579] To 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic
acid (40 mg, 0.122 mmol.), HATU (70 mg, 0.183 mmol), HOBt (4mg, 0.024 mmol) and DIEA
(85 µL, 0.488 mmol) in 2 mL of DMF was added ammonium chloride (20 mg, 0.366 mmol).
The reaction mixture was stirred at room temperature for 1 hour. The reaction mixtue
was diluted with ethyl acetate washed with saturated NaHCO
3 solution, brine, dried over MgSO4, filtered, and evaporated to dryness to provide
42 mg of 5-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxamide
(100%). LCMS (M+1=328).
Example 161. Synthesis of 5-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxamide
[0580]

[0581] Same procedure as
[Example 159]. LCMS (M+1=410)
Example 162. Synthesis of 4-(7-(tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic acid
[0583]

[0584] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidine-7-yl)(cyclopropyl)carbamate (0.5 g, 1.48 mmol) and commercially available
(Combi-Blocks) 2-carboxythiophene-4-boronic acid pinacol ester (754 mg, 2.97 mmol)
were dissolved in acetonitrile. 2M Na
2CO
3 (1 mL) was added and the solution was degassed with a stream of N
2 for 10 min. PdCl
2dppf·CH
2Cl
2 (60 mg, 0.07 mmol) was added and the reaction was heated to 100°C for 1.5 h. The
solution was diluted with 1.5N NaOH (80 mL) and filtered over celite. The pH of the
filtrate was adjusted to pH=3 by the addition of 6M HCl. The resulting precipitate
was filtered and dried
in vacuo to afford 4-(7-(
tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (473 mg, 74%) as a tan solid. LCMS (ES):
>90% pure, m/z 429 [M+1]
+.
Example 163. Synthesis of 4-(7-(cyclopropyl)amino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic acid
[0585]

[0586] 4-(7-(
Tert-butoxycarbonyl(cyclopropyl)amino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (473 mg, 1.10 mmol) was dissolved in dichloromethane
(5 mL) and trifluoroacetic acid (3 mL). After 1 h, the dark red solution was concentrated
under a stream of air. The red oil was triturated with Et
2O (5 mL) and the precipitate was filtered to provide 4-(7-(cyclopropyl)amino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (321 mg, 88%). LCMS (ES): >95% pure, m/z
329 [M+1]
+.
Example 164. Synthesis of (Z)-4-(7-(cyclopropyl)amino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)thiophene-2-carboxylic acid
[0587]

[0588] Hydantoin (292 mg, 2.92 mmol) and piperidine (285 µL, 2.89 mmol) were added to 4-(7-(cyclopropyl)amino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (315 mg, 0.96 mmol) dissolved in ethanol
(5 mL). The reaction was heated at 80°C. After 15 h, the reaction was cooled to r.t.,
then diluted with water (10 mL). The pH was adjusted to pH=3 by addition of 1N HCl.
The yellow precipitate was collected and washed with 1:1 ethanol:water (10 mL) and
then ethanol (10 mL). The solid was dried
in vacuo to give (Z)-4-(7-(cyclopropyl)amino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (362 mg, 92%). LCMS (ES): >95% pure, m/z
411 [M+1]
+.
Example 165. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(5-(2,6-dimethylmorpholine-4-carbonyl)thiophen-3-yl)pyrazolo[1,5-a]pyramidin-3-yl)methylene)imidazolidine-2,4-dione
[0589]

[0590] (
Z)-4-(7-(Cyclopropyl)amino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-yl)thiophene-2-carboxylic acid (1.0 eq, 34 mg, 0.0828 mmol) was mixed
in a vial with HOBt.H
2O (2.0 eq, 22 mg, 0.163 mmol), 2,6 dimethylmorpholine (isomer mixture, 4.0 eq, 41
ul, 0.333 mmol), DIEA (2.0 eq, 29 ul, 0.166 mmol) in NMP (0.5 ml). EDCI (2.0 eq, 32
mg, 0.166 mmol) was added and the mixture was stirred at 70°C for 1 hour. Water was
added and the resulting precipitate was filtered and dried. The material was triturated
in a mixture of ethyl acetate and hexanes, filtered and dried
in vacuo to give (Z)-5-((7-(cyclopropylamino)-5-(5-(2,6-dimethylmorpholine-4-carbonyl)thiophen-3-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
as a yellow solid (26 mg, 62% yield). LCMS (ES): >95% pure, m/z 508 [M+1]
+.
[0591] The following compounds were prepared using conditions similar to the chemistries
described in
Example 165. All compounds were characterized by LCMS. Table 24B shows the biological activities
of the compounds listed in Table 24A.
Table 24B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| C13 |
<0.01 |
2.382 |
>30 |
>30 |
| D13 |
<0.01 |
> 2.5000 |
0.605 |
0.591 |
| E13 |
<0.01 |
0.982 |
1.469 |
3.466 |
| F13 |
<0.01 |
0.6084 |
1.641 |
0.943 |
| G13 |
<0.01 |
0.888 |
0.845 |
1.251 |
| H13 |
<0.01 |
0.654 |
3.98 |
10.149 |
| I13 |
<0.01 |
1.8781 |
15.19 |
> 30 |
| J13 |
<0.01 |
0.548 |
0.266 |
1.348 |
| K13 |
<0.01 |
> 2.5000 |
4.31 |
9.291 |
| L13 |
<0.01 |
1.9547 |
1.548 |
0.767 |
| M13 |
<0.01 |
> 2.5000 |
10.179 |
4.429 |
| N13 |
<0.01 |
1.9848 |
3.335 |
4.142 |
| O13 |
<0.01 |
> 2.5000 |
6.095 |
19.358 |
| P13 |
<0.01 |
0.8133 |
2.772 |
8.499 |
| Q13 |
<0.01 |
|
>30 |
6.578 |
| R13 |
<0.01 |
> 2.5000 |
1.657 |
2.293 |
Example 166. Synthesis of 5-(hydroxymethyl)thiophen-2-boronic acid
[0592]

[0593] 5-(Hydroxymethyl)thiophen-2-boronic acid was prepared from the commercially available
5-formylthiophen-2-boronic acid (Combi-Blocks) according to the procedure described
in patent application
WO2007/118137.
Example 167. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-2-yl)pyrazolo[1,5-a]pyrimidine-7-yl)carbamate
[0594]

[0595] Note: DME and 2M Na
2CO
3 were degassed with a stream of N
2 in separate flasks prior to addition.
Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidine-7-yl)(cyclopropyl)carbamate (1.5 g, 4.45 mmol) was dissolved in DME (40
mL). Crude 5-(hydroxymethyl)thiophen-3-boronic acid (1.4 g, 8.9 mmol) was added, followed
by Pd(PPh
3)
4 (510 mg, 0.45 mmol) and finally 2M Na
2CO
3 (6.7 ml, 13.3 mmol). The reaction was heated to 90°C for 2 h. The solution was partitioned
between EtOAc (100 mL) and 0.5N HCl (100 mL). The aqueous layer was extracted with
EtOAc (2 x 75 mL). The organics were washed with brine (250 mL), dried over MgSO
4 filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30-45% EtOAc/hexanes) and
then triturated with hexanes (3 x 10 mL) to yield
tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-2-yl)pyrazolo[1,5-
a]pyrimidine-7-yl)carbamate (984 mg, 53%) as an off white solid. LCMS (ES): >95% pure,
m/z 415 [M+1]
+.
Example 168. Synthesis of 5-(5-(bromomethyl)thiophen-2-yl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0596]

[0597] Hydrogen bromide (48% in water, 5 mL) was added dropwise to
tert-butyl cyclopropy)(3-formyl-5-(5-(hydroxymethyl)thiophen-2-yl)pyrazolo[1,5-
a]pyrimidine-7-yl)carbamate (980 mg, 2.4 mmol) suspended in dichloromethane (5 mL).
The solution immediately became dark brown and homogeneous upon addition. The reaction
was heated to 40°C for 4 hours, then diluted with dichloromethane (10 mL). The liquid
was decanted and the gummy residue was washed with dichloromethane (3x10 mL). The
combined liquids were washed successively with sat. NaHCO
3 (20 mL) and brine (20 mL), and then dried over MgSO
4, filtered and concentrated
in vacuo. The residue was triturated with hexanes and then purified via flash column chromatography
(10-20% EtOAc/hexanes) to provide 5-(5-(bromomethyl)thiophen-2-yl)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (300 mg, 34%) as a yellow solid. LCMS (ES): >95% pure,
m/z 378 [M+1]
+.
Example 169. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(5-pyrrolidin-1-ylmethyl)thiophen-2-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0598]

[0599] Potassium carbonate (30 mg, 0.20 mmol) was added to 5-(5-(bromomethyl)thiophen-2-yl)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (25 mg, 0.07 mmol) dissolved in DMF (0.7 mL). Pyrrolidone
(6 µL, 0.07 mmol) was added and the reaction was heated to 60°C for 4 h. Water (3
mL) was added and the orange precipitate was filtered and dried
in vacuo to give 7-(cyclopropylamino)-5-(5-(pyrrolidin-1-ylmethyl)thiophen-2-yl)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (13 mg, 54%) which was used without further purification.
LCMS (ES): >85% pure, m/z 368 [M+1]
+.
[0600] Hydantoin (3 mg, 0.03 mmol) and piperidine (3 µL, 0.03 mmol) were added to 7-(cyclopropylamino)-5-(5-(pyrrolidin-1-ylmethyl)thiophen-2-yl)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (12 mg, 0.03 mmol) dissolved in ethanol (0.5 mL). The reaction
was heated at 80 °C. After 15h, the reaction was cooled to room temperature then diluted
with water (3 mL). The precipitate was collected and washed with 1:1 ethanol:water
(3 mL) and dried
in vacuo to furnish (
Z)-5-((7-(cyclopropylamino)-5-(5-pyrrolidin-1-ylmethyl)thiophen-2-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(2.8 mg, 9% over two steps). LCMS (ES): >95% pure, m/z 450 [M+1]
+.
[0601] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 168 and
Example 169. All compounds were characterized by LCMS. Table 25B shows the biological activities
of the compounds listed in Table 25A.
Table 25B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| S13 |
<0.01 |
> 2.5000 |
1.266 |
2.261 |
| T13 |
<0.01 |
0.8106 |
0.658 |
0.352 |
| U13 |
<0.01 |
> 2.5000 |
0.449 |
0.418 |
| V13 |
<0.01 |
> 2.5000 |
1.282 |
1.516 |
| W13 |
<0.01 |
> 2.5000 |
0.52 |
0.94 |
| X13 |
<0.01 |
1.872 |
1.338 |
0.379 |
Example 170. Synthesis of 5-(hydroxymethyl)thiophen-3-boronic acid
[0602]

[0603] 5-(Hydroxymethyl)thiophen-3-boronic acid was prepared from the commercially available
5-formylthiophen-3-boronic acid (Combi-Blocks) according to the procedure described
in patent application
WO2007/118137.
Example 171. Synthesis of tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-a]pyrimidine-7-yl)carbamate
[0604]

[0605] Note: DME and 2M Na
2CO
3 were degassed with a stream of N
2 in separate flasks prior to addition.
Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidine-7-yl)(cyclopropyl)carbamate (750 mg, 2.22 mmol) was dissolved in DME (22
mL). Crude 5-(hydroxymethyl)thiophen-3-boronic acid (880 mg, 5.57 mmol) was added,
followed by Pd(PPh
3)
4 (256 mg, 0.22 mmol) and finally 2M Na
2CO
3 (3.3 mL, 6.60 mmol). The reaction was heated to 90°C for 2h. The solution was partitioned
between EtOAc (100 mL) and 0.5N HCl (100 mL). The aqueous layer was extracted with
EtOAc (2 x 75 mL). The organics were washed with brine (250 mL), dried over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30-45% EtOAc/hexanes) and
then triturated with hexanes (3 x 10 mL) to yield
tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-7-yl)carbamate (638 mg, 69%) as an off white solid.
1H NMR (CDCl
3, 400 MHz) δ: 10.34 (s, 1H, 8.55 (s, 1H), 8.11 (d, 1H,
J = 1.6 Hz), 7.76 (d, 1H,
J = 1.6 Hz), 7.18 (s, 1H), 4.93 (bs, 2H), 3.30 (dddd, 1H,
J = 6.8, 6.8, 3.6, 3.6 Hz), 2.15 (bs, 1H), 1.42 (s, 9H), 0.85-0.92 (m, 2H), 0.63-0.70
(m, 2H). LCMS (ES): >95% pure, m/z 415 [M+1]
+.
Example 172. Synthesis of 7-(cyclopropylamino)-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde 2,2,2,-trifluoroacetate
[0606]

[0607] Tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-7-yl)carbamate (20 mg, 0.05 mmol) was dissolved in dichloromethane (0.5
mL) and trifluoroacetic acid (0.5 mL). After 1 h, the solution was concentrated under
a stream of air. The residue was purified via preparative HPLC to furnish 7-(cyclopropylamino)-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde 2,2,2-trifluoroacetate (4.8 mg, 23%).
Example 173. Synthesis of 5-(5-(bromomethyl)thiophen-3-yl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0608]

[0609] Hydrogen bromide (48% in water, 2.5 mL) was added dropwise to
tert-butyl cyclopropyl(3-formyl-5-(5-(hydroxymethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-7-yl)carbamate (561 mg, 1.35 mmol) suspended in dichloromethane (3.5 mL).
The solution immediately became dark brown and homogeneous upon addition. The reaction
was heated to 40°C for 3 h, then diluted with dichloromethane (10 mL). The liquid
was decanted and the gummy residue was washed with dichloromethane (3 x 10 mL). The
combined liquids were washed successively with sat. NaHCO
3 (20 mL) and brine (20 mL), and then dried over MgSO
4 filtered and concentrated
in vacuo. The residue was triturated with hexanes and then purified via flash column chromatography
(15-40% EtOAc/hexanes) to provide 5-(5-(bromomethyl)thiophen-3-yl)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (105 mg, 20%) as a yellow solid.
1H NMR (CDCl
3, 400 MHz) δ: 10.26 (s, 1H), 8.44 (s, 1H), 8.12 (d, 1H,
J = 1.6 Hz), 7.80 (s, 1H), 6.73 (s, 1H), 6.65 (bs, 1H), 4.80 (s, 2H), 2.81 (m, 1H),
1.03-1.09 (m, 2H), 0.84-0.89 (m, 2H). LCMS (ES): >95% pure, m/z 378 [M+1]
+.
Example 174. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(5-pyrrolidin-1-ylmethyl)thiophen-3-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0610]

[0611] Potassium carbonate (30 mg, 0.20 mmol) was added to 5-(5-(bromomethyl)thiophen-3-yl)-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (25 mg, 0.07 mmol) dissolved in DMF (0.7 mL). Pyrrolidine
(6 µL, 0.07 mmol) was added and the reaction was heated to 50°C for 1.25 h. Water
(3 mL) was added and the orange precipitate was filtered and dried
in vacuo to give 7-(cyclopropylamino)-5-(5-(pyrrolidin-1-ylmethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (13 mg, 54%) which was used without further purification.
LCMS (ES): >85% pure, m/z 368 [M+1]
+.
[0612] Hydantoin (3 mg, 0.03 mmol) and piperidine (3 µL, 0.03 mmol) were added to 7-(cyclopropylamino)-5-(5-(pyrrolidin-1-ylmethyl)thiophen-3-yl)pyrazolo[1,5-
a]pyrimidine-3-carbaldehyde (12 mg, 0.03 mmol) dissolved in ethanol (0.5 mL). The reaction
was heated at 80 °C. After 15 h, the reaction was cooled to r.t., then diluted with
water (3 mL). The precipitate was collected and washed with 1:1 ethanol:water (3 mL)
and dried
in vacuo to furnish (Z)-5-((7-(cyclopropylamino)-5-(5-pyrrolidin-1-ylmethyl)thiophen-3-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(2.8 mg, 9% over two steps). LCMS (ES): >95% pure, m/z 450 (M+1]
+.
[0613] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 174. All compounds were characterized by LCMS. Table 26B shows the biological activities
of the compounds listed in Table 26A.
Table 26B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| Y13 |
<0.01 |
> 2.5000 |
1.386 |
0.929 |
| Z13 |
<0.01 |
> 2.5000 |
2.498 |
10.153 |
| A14 |
<0.01 |
1.5722 |
1.614 |
1.758 |
| B14 |
<0.01 |
1.4451 |
1.614 |
1.003 |
[0614] The chemistry depicted in Figure 3 can be used to prepare analogs
7 substituted by a methyl group. Commercially available boronic acid
1 can be reacted with tert-butyl 5-chloropyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
2 under Suzuki reaction conditions to for methyl ketone
3. This compound
3 can be reacted with various substituted amines
4 under reductive amination conditions such as the conditions described in
US2007/244094 or reaction conditions described in
European Journal of Medicinal Chemistry, vol 32, 1997, 143-150 to prepare compounds
5. Compound
5 can be converted to aldehyde
6 under Vilsmeier conditions. Compound
6 can be converted to compound
7 by reacting with hydantoin and piperidine in ethanol.
[0615] The molecules in the following Table 27 can be prepared using similar chemistries.

Example 175. Synthesis of 6-bromo-N-cyclopropylimidazo[1,2-a]pyrazin-8-amine
[0616]

[0617] Diisopropylethylamine (2.4 mL, 13.62 mmol) and cyclopropylamine (943 µL, 13.62 mmol)
were added to commercially available (Ark Pharm, Inc.) 6,8-dibromoimidazo[1,2-
a]pyrazine (2.51 g, 9.08 mmol) dissolved in 2-propanol (9 mL). The solution was placed
in an 80 °C oil bath. After 4.5 h, the volatiles were removed
in vacuo. The brown residue was partitioned between dichloromethane (50 mL) and water (50 mL).
The organic layer was washed further with water (50 mL) and then brine (50 mL). The
organic layer was dried over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via a filtration over a short plug of silica gel (40% EtOAc/hexanes)
and the filtrate was concentrated
in vacuo to afford 6-bromo-
N-cyclopropylimidazo[1,2-
a]pyrazin-8-amine (2.19 g, 95%) as a light brown solid.
1H NMR (CDCl
3, 400 MHz) δ: 7.61 (s, 1H), 7.46 (d, 1H,
J = 1.2 Hz), 7.44 (d, 1H,
J = 1.2 Hz), 6.26 (bs, 1H), 3.02 (dddd, 1H,
J = 7.2, 7.2, 7.2, 3.6 Hz), 0.89-0.95 (m, 2H), 0.64-0.69 (m, 2H). LCMS (ES): >95% pure,
m/z 254 [M+1]
+.
Example 176. Synthesis of tert-butyl 6-bromoimidazo[1,2-a]pyrazin-yl(cyclopropyl) carbamate
[0618]

[0619] 6-Bromo-
N-cyclopropylimidazo[1,2-
a]pyrazin-8-amine (0.5 g, 1.98 mmol) was dissolved in dichloromethane (8 mL). Di-tert-butyl
dicarbonate (733 mg, 3.35 mmol), DMAP (5 mg, 0.02 mmol) and pyridine (0.4 mL) were
added sequentially. After 12 h, the solution was diluted with EtOAc (50 mL) and then
washed sequentially with 1N HCl (50 mL), 1N NaOH (50 mL), and brine (50 mL). The organic
layer was dried over MgSO
4 filtered and concentrated
in vacuo. The residue was triturated with hexanes (5 mL) to yield
tert-butyl 6-bromoimidazo[1,2-a]pyrazin-8-yl(cyclopropyl) carbamate (337 mg, 48%) as an
off white solid.
1H NMR (CDCl
3, 400 MHz) δ: 8.18 (s, 1H), 7.78 (d, 1H,
J = 0.8 Hz), 7.67 (d, 1H,
J = 0.8 Hz), 3.25 (dddd, 1H,
J = 6.8, 6.8, 3.6, 3.6 Hz), 1.20 (s, 9H), 0.78-0.86 (m, 2H), 0.71-0.77 (m, 2H). LCMS
(ES): >90% pure, m/z 354 [M+1]
+.
Example 177. Synthesis of 6-bromo-8-(cyclopropylamino)imidazo[1,2-a]pyrazine-3-carbaldehyde
[0620]

[0621] Phosphorus(V) oxychloride (3.9 mL, 42.68 mmol) was added dropwise to anhydrous DMF
(16 mL) at 0 °C. 6-bromo-
N-cyclopropylimidazo[1,2-
a]pyrazin-8-amine (900 mg, 3.56 mmol) was dissolved in anhydrous DMF (24 mL) and added
over two minutes. The solution was place in an 85°C oil bath for 5 h. The solution
was cooled to 0°C and conc. HCl (30 mL) was added. The mixture was basified to pH=10w/
3N NaOH (∼175 mL). The mixture was extracted with dichloromethane (3 x 250 mL), and
the organics were washed with brine (500 mL). The organic layer was dried over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30% EtOAc/hexanes) to furnish
6-bromo-8-(cyclopropylamino)imidazo[1,2-
a]pyrazine-3-carbaldehyde (490 mg, 49%). LCMS (ES): >95% pure, m/z 282 [M+H]
+.
Example 178. Synthesis of tert-butyl 6-bromo-3-formylimidazo[1,2-a]pyrazine-8-yl(cyclopropyl)carbamate
[0622]

[0623] Di-
tert-butyl dicarbonate (1.16 g, 5.30 mmol) and DMAP (21 mg, 0.18 mmol) were added to a
solution of 6-bromo-8-(cyclopropylamino)imidazo[1,2-
a]pyrazine-3-carbaldehyde (994 mg, 3.50 mmol) in dichloromethane (15 mL). After 2.5
h, the solution was partitioned between EtOAc (100 mL) and water (100 mL). The aqueous
layer was further extracted with EtOAc (2 x 75 mL). The organics were washed with
brine (250 mL), dried over MgSO
4 filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30% EtOAc/hexanes) to provide
tert-butyl 6-bromo-3-formylimidazo[1,2-
a]pyrazine-8-yl(cyclopropyl)carbamate (1.17 g, 87%) as a brown foam.
1H NMR (CDCl
3, 400 MHz) δ: 10.05 (s, 1H), 9.42 (s, 1H), 8.37 (s, 1H), 3.25 (dddd, 1H,
J = 6.8, 6.8, 4.0, 4.0 Hz), 1.22 (s, 9H), 0.85-0.90 (m, 2H), 0.69-0.75 (m, 2H). LCMS
(ES): >95% pure, m/z 382 [M+1]
+.
Example 179. Synthesis of tert-butyl cyclopropyl(3-formyl-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0624]

[0625] Tert-butyl 6-bromo-3-formylimidazo[1,2-
a]pyrazine-8-yl(cyclopropyl)carbamate (130 mg, 0.34 mmol), 3-(trifluoromethoxy)phenyl
boronic acid (105 mg, 0.51 mmol), 3M Na
2CO
3 (1.1 mL, 3.4 mmol) and DME (4.5 mL) were combined. The solution was degassed with
a stream of N
2 for 10 min. Pd(PPh
3)
4 was added and the solution was refluxed for 2 h. The solution was partitioned between
dichloromethane (25 mL) and water (25 mL). The aqueous layer was further extracted
with dichloromethane (2 x 25 mL). The organics were washed with brine (50 mL), dried
over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30-45% EtOAc/hexanes) to
provide
tert-butyl cyclopropyl(3-formyl-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
(96 mg, 61%) as a bright yellow solid. LCMS (ES): >95% pure, m/z 463 [M+1]
+.
Example 180. Synthesis of tert-butyl cyclopropyl(6-3-trifluoromethoxy)phenyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0626]

[0627] Tert-butyl cyclopropyl(6-(3-trifluoromethoxy)phenyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (77%) was synthesized in a manner analogous to
Example 179. LCMS (ES): >95% pure, m/z 435 [M+1]
+.
Example 181. Synthesis of tert-butyl cyclopropyl(6-(3-fluorophenyl)-3-formylimidazo[1,2-a]pyrazin-8-yl)carbamate
[0628]

[0629] Tert-butyl cyclopropyl(6-(3-fluorophenyl)-3-formylimidazo[1,2-
a]pyrazin-8-yl)carbamate (28%) was synthesized in a manner analogous to
Example 183. LCMS (ES): >95% pure, m/z 435 [M+1]
+.
Example 182. Synethesis of tert-butyl cyclopropyl(3-formyl-6-(3-(morpholinomethy)phenyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0630]

[0631] Tert-butyl 6-bromo-3-formylimidazo[1,2-
a]pyrazine-8-yl(cyclopropyl)carbamate (100 mg, 0.26 mmol), 4-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl]morpholine
(118 mg, 0.39 mmol), 3M Na
2CO
3 (1.3 mL, 2.60 mmol) and DME (3.5 mL) were combined. The solution was degassed with
a stream of N
3 for 10 min. Pd(PPh
3)
4 was added and the solution was refluxed for 2 h. The solution was partitioned between
dichloromethane (25 mL) and water (25 mL). The aqueous layer was further extracted
with dichloromethane (2 x 25 mL). The organics were washed with brine (50 mL), dried
over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via preparative TLC (5% MeOH/dichloromethane) to afford
tert-butyl cyclopropyl(3-formyl-6-(3-(morpholinomethyl)phenyl)imidazo[1,2
-a]pyrazin-8-yl)carbamate (60 mg, 48%). LCMS (ES): >95% pure, m/z 478 [M+1]
+
Example 183. Synthesis of tert-butyl cyclopropyl(3-formyl-6-((trimethylsilyl)ethynyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0632]

[0633] Triethylamine (9.12 µL, 6.56 mmol) was added to
tert-butyl 6-bromo-3-formylimidazo[1,2-
a]pyrazine-8-yl(cyclopropyl)carbamate (250 mg, 0.66 mmol) dissolved in anhydrous DMF
(2.2 mL) in a 15 mL pressure tube. The solution was degassed with a stream of N
2 for 10 min. Trimethylsilylacetylene (927 µL, 6.56 mmol), Pd(PPh
3)
4 (76 mg, 0.07 mmol), and copper(I) iodide (25 mg, 0.13 mmol) were added and the reaction
was sealed and heated to 65 °C for 24 h. The reaction was diluted with EtOAc (50 mL)
and then washed with 10% brine (4 x 50 mL) and brine (50 mL). The organics were dried
over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30% EtOAc/hexanes) to give
tert-butyl cyclopropyl(3-formyl-6-((trimethylsilyl)ethynyl)imidazo[1
,2-
a]pyrazin-8-yl)carbamate (186 mg, 71%) as a brown foamy solid. LCMS (ES): >95% pure,
m/z 400 [M+1]
+.
Example 184. Synthesis of tert-butyl cyclopropyl(3-formyl-6-((phenylethynyl)imidazol[1,2-a]pyrazin-8-yl)carbamate
[0634]

[0635] Tert-butyl cyclopropyl(3-formyl-6-((phenylethynyl)imidazo[1,2-
a]pyrazin-8-y])carbamate (64%) was synthesized in a manner analogous to
Example 183. LCMS (ES): >95% pure, m/z 403 [M+1]
+.
Example 185. Synthesis of tert-butyl cyclopropyl(6-ethynyl-3-formylimidazo[1,2-a]pyrazin-8-yl)carbamate
[0636]

[0637] Potassium carbonate (86 mg, 0.63 mmol) was added to
tert-butyl cyclopropyl(3-formyl-6-((trimethylsilyl)ethynyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (50 mg, 0.13 mmol) dissolved in methanol (2.5 mL). After 2
h, the volatiles were removed
in vacuo. The residue was partitioned between dichloromethane (10 mL) and water (10 mL). The
aqueous layer was further extracted with dichloromethane, (2 x 10 mL). The organics
were washed with brine (30 mL), dried over MgSO
4, filtered and concentrated
in vacuo. The residue was purified via flash column chromatography (30% EtOAc/hexanes) to provide
tert-butyl cyclopropyl(6-ethynyl-3-formylimidazo[1,2-
a]pyrazin-8-yl)carbamate (20 mg, 50%) as a yellow foamy solid. LCMS (ES): >95% pure,
m/z 327 [M+1]
+.
Example 186. Synthesis of tert-butyl cyclopropyl(3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0638]

[0639] Hydantoin (33 mg, 0.33 mmol) and piperidine (33 µL, 0.33 mmol) were added to
tert-butyl cyclopropyl(3-formyl-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (50 mg, 0.11 mmol) suspended in ethanol (0.5 mL). The reaction
was sealed and irradiated in the microwave at 80 °C for 12 h. The precipitate was
filtered off and washed with ethanol (3 mL) to give (
Z)-
tert-butyl cyclopropyl(3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (18 mg, 30%) as a bright yellow solid. LCMS (ES): >90% pure,
m/z 545 [M+1]
+.
Example 187. Synthesis of 5-((8-cyclopropylamino)-6-(-3-(trifluoromethoxy)phenyl) imidazo[1,2-a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione
[0640]

[0641] Tert-butyl cyclopropyl(3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-(3-trifluoromethoxy)phenyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (15 mg, 0.03 mmol) was dissolved in dichloromethane (0.5 mL)
and trifluoroacetic acid (0.5 mL). After 1 h, the solution was concentrated under
a stream of air. The residue was purified via preparative HPLC to furnish (Z)-5-((8-cyclopropylamino)-6-(3-(trifluoromethoxy)phenyl)
imidazo[1,2-
a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione (0.9 mg, 8%).
Example 188. Synthesis of tert-butyl cyclopropyl(3-((2,5-dioxoimidazolin-4-ylidene)methyl)-6-(phenylethynyl)imidazo[1,2-a]pyrazin-8-yl)carbamate
[0642]

[0643] Hydantoin (24 mg, 0.24 mmol) and piperidine (24 µL, 0.24 mmol) were added to
tert-butyl cyclopropyl(3-formyl-6-((phenylethynyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (24 mg, 0.06 mmol) dissolved in ethanol (1 mL). The reaction
was heated at 80°C for 12 h, and then cooled to r.t. The precipitate was filtered
off and washed with ethanol (3 mL) to give (Z)
-tert-butyl cyclopropyl(3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-(phenylethynyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (12 mg, 43%) as an orange/yellow solid. LCMS (ES): >90% pure,
m/z 485 [M+1]
+.
Example 189. Synthesis of (Z)-5-((8-(cyclopropylamino)-6-(phenylethynyl)imidazo[1,2-a]pyrazin-3-yl)methylene-imidazoline-2,4-dione
[0644]

[0645] (Z)-
Tert-butyl cyclopropyl(3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-(phenylethynyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (12 mg, 0.03 mmol) was dissolved in dichloromethane, (0.3
mL) and trifluoroacetic acid (0.3 mL). After 1 h, the solution was concentrated under
a stream of air. The residue was triturated with Et
2O and filtered to yield (
Z)-5-((8-(cyclopropylamino)-6-(phenylethynyl)imidazo[1,2-
a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione (6 mg, 63%) as a bright yellow solid.
Example 190. Synthesis of (Z)-5-((8-(cyclopropylamino)-6-(3-morpholinomethyl)phenyl)imidazo[1,2-a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione 2,2,2-trifluoroacetate
[0646]

[0647] Hydantoin (152 mg, 1.50 mmol) and piperidine (150 µL, 1.50 mmol) were added to
tert-butyl cyclopropyl(3-formyl-6-(3-(morpholinomethyl)phenyl)imidazo[1,2-
a]pyrazin-8-yl)carbamate (60 mg, 0.13 mmol) dissolved in ethanol (1 mL). The reaction
was heated at 80°C for 4 d, and then diluted with water (10 mL). The supernatant was
decanted and extracted with dichloromethane (2 x 5 mL). The organics were washed with
brine (30 mL), dried over MgSO
4, filtered and concentrated
in vacuo to a yellow solid. LCMS (ES): >95% pure, m/z 560 [M+1]
+.
[0648] The crude solid was dissolved in dichloromethane (0.5 mL) and trifluoroacetic acid
(0.5 mL). After 1 h, the solution was concentrated under a stream of air. The residue
was purified via preparative HPLC to furnish (Z)-5-((8-(cyclopropylamino)-6-(3-morpholinomethyl)phenyl)imidazo[1,2-
a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione 2,2,2-trifluoroacetate (5.5 mg, 8%
over two steps).
Example 191. Synthesis of (Z)-5-((8-cyclopropylamino)-6-(3-fluorophenyl)imidazo[1,2-a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione
[0649]

[0650] Hydantoin (18 mg, 0.17 mmol) and piperidine (17 µL, 0.17 mmol) were added to
tert-butyl cyclopropyl(6-fluorophenyl)-3-formyllimidazo[1,2-
a]pyrazin-8-yl)carbamate (23 mg, 0.06 mmol) dissolved in ethanol (0.3 mL). The reaction
was heated at 80°C for 18 h, and then concentrated
in vacuo to a yellow solid. The crude solid was dissolved in dichloromethane, (0.5 mL) and
trifluoroacetic acid (1.5 mL). After 1 h, the solution was concentrated under a stream
of air. The residue was triturated with ethanol and filtered to provide (Z)-5-((8-cyclopropylamino)-6-(3-fluorophenyl)imidazo[1,2-
a]pyrazin-3-yl)methylene)imidazolidine-2,4-dione as an orange/yellow solid (2.4 mg,
10% over two steps).
Example 192. Synthesis of Related Compounds.
[0651] The compounds in the following table were prepared by the methods described above,
by selecting appropriate starting materials as is apparent to the person of ordinary
skill. Table 28B shows the biological activities of the compounds listed in Table
28A.
Table 28B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (5 µM ATP) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| C14 |
> 5.0000 |
> 2.5000 |
|
|
| D14 |
<0.1 |
> 2.5000 |
4.531 |
3.69 |
| E14 |
> 5.0000 |
> 2.5000 |
|
|
| F14 |
> 5.0000 |
> 2.5000 |
|
|
| G14 |
> 5.0000 |
> 2.5000 |
|
|
[0652] The chemistries described on Figure 7 can be used to prepare analogs substituted
by a trifluoromethyl group. Commercially available 2-amino-3,5-dibromopyrazine and
commercially available 3-bromo-1,1,1-trifluoroacetone can be reacted together at 50°C
in a solvent such as dioxin (conditions previously described in
WO2003/82817), to prepare compound
3 Compound
3 can be reacted with amine R
1NH
2 to obtain
4. This material can be protected by a boc group by reacting
4 with a reagent like Boc
2O to obtain
5. This material can be further transformed into
6 under vilsmeir conditions in the presence of POCl
3. Compound
6 can be reacted with various reagents such as boronic acids or esters W-B(OR
3)
2 under Suzuki conditions to form molecule 7.
[0653] Other analogs of
7 can be prepared by heating
6 with amines or anilines R
5R
6NH, alcohols or phenols R
5OH, thiols or thiophenols R
5SH, in the presence of a base or an acid. Compound
8 can be prepared by heating
7 with hydantoin in ethanol in the presence of a base such as piperidine.
GENERAL METHODS
[0654] Unless otherwise specified, the various substituents of the compounds are defined
in the same manner as the formulae II/II' compound of the invention.
[0655] The chemistry described in Figure 4 and Figure 5 can be used to prepare various substituted
compounds of formula II.
[0656] Substituted aminopyrazole
1 can react with isothiocyanate
2 to form intermediate
3. Compound
3 can be cyclized to
4 in the presence of a base such as sodium hydroxide. Compound
4 can be alkylated by with R7Halo in the presence of a base. Compound
5 can be converted to compound
6 using phosphorus oxychloride. Molecule
7 can be prepared by addition of amine R
7R
8NH to molecule
6 in a solvent like NMP or DMF. Compound
8 can be obtained by reacting compound
7 with DMF and Phosphorus oxychloride under Vilsmeier reaction conditions. Aldehyde
8 can be converted in two steps to substituted ketone
8b by reacting with a Grignard reagent R
4MgX, followed by reaction with an oxidant such as DCC or using Swern reaction conditions.
[0657] Compound
8 and
8a, or
8b and
8a can react upon heating in a solvent such as ethanol and in the presence of a base
such as piperidine to form compound
9. Oxidation of
9 by an oxidant such as meta-chloroperbenzoic acid or oxone can provide compound
10, which can contain variable quantities of sulfide (n = 0), sulfoxide (n = 1) or sulfone
(n = 2).
[0658] The chemistry depicted in Figure 5 can be used to prepare various substituted analogs
of formula II compounds.
[0659] Compound
10 can be mixed at room temperature or heated with amines R
7R
8NH to form compound
11. Compound
10 can be reacted with hydrazines R
7R
8N-NH
2 to form compound
12. Compound
10 can be reacted with alcohols or phenols R
7OH in the presence of a base such as NaH or K
2CO
3 to form compound
13. Compound
10 can be reacted with thiols or thiophenols R
7SH with or without a base to form compound
14.
[0660] The chemistry described in Figure 6 can be used to prepare analogs substituted by
aryl or heteroaryls groups. Compound
7 can be reacted with boronic esters or acids W-B(OR
7)
2 or organo tin compounds W-Sn(R
7)
3 in the presence of tri(2-furyl)phosphine, copper(I)thiophene-2-carboxylate and Pd
2dba
3 or using conditions previously desbribed in
Organic Letters 2002, vol 4(6), pp. 979-981. Compound
15 can be converted to compound
18 using chemistries similar to the one described in Figure 4.
Example 193. Synthesis of 2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-4(3H)-one
[0661]

[0662] The material was prepared according to a procedure published in patent
US 3,846,423. Characterized by LCMS (ES):>95% pure, m/z 183 [M+H]
+.
Example 194. Synthesis of 4-chloro-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazine
[0663]

[0664] In a round bottom flask equipped with a magnetic stirbar, 2-methylthio)pyrazolo[1,5-a][1,3,5]triazin-4(3H)-one
(1.0 eq, 10.43 g, 57.24 mmol) was suspended in acetonitrile (100 ml). Phosphorus oxychloride
(4.0 eq, 21 ml, 229.4 mmol) and triethylamine (1.05 eq, 8.4 ml, 60.27 mmol) were added
and the mixture stirred at reflux for 3.5 hours, at which time LCMS indicated completion
of the reaction. The mixture was cooled down and slowly poured into crushed ice (final
total volume of about 600 ml). The solid was filtered, washed with water and dried
in a vacuum oven to afford 4-chloro-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazine as
a tan solid (8.15 g, 71% yield). LCMS (ES):>97% pure, m/z 201 [M+1]
+.
Example 195. Synthesis of N-cyclopropyl-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-4-amine
[0665]

[0666] 4-Chloro-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazine (1.0 eq, 6.26 g, 31.19 mmol)
was suspended in anhydrous NMP (50 ml). Cyclopropylamine (1.5 eq, 3.2 ml, 46.26 mmol)
was added through syringe dropwise. Internal temperature rose to 47°C. The mixture
was stirred without any external cooling for one hour. An additional amount of cypropylamine
(1ml) was added and the mixture stirred for another 1.5 hours. The mixture was slowly
poured into water (500 ml) under stirring. The resulting solid was filtered, washed
with water and dried in a vacuum oven to give N-cyclopropyl-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-4-amine
as a tan solid (5.44 g, 79% yield). LCMS (S):>95% pure, m/z 222 [M+H]
+.
[0667] The following molecules were prepared using chemistries similar to
Example 195. Compounds were characterized by LCMS.
Example 196. Synthesis of 4-(cyclopropylamino)-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
[0668]

[0669] N-Cyclopropyl-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-4-amine (1.0 eq, 3.10 g,
14.00 mmol) was dissolved in anhydrous DMF (50 ml) under nitrogen atmosphere. Phosphorus
oxychloride (5.0 eq, 6.4 ml, 69.9 mmol) was added dropwise over 5 minutes. Internal
temperature rose to 45°C. The reaction was stirred in an oil bath at 70°C for 4.5
hours. The mixture was cooled down and added dropwise into a solution of 6N NaOH (150
ml) chilled with an ice bath. The rate of addition was adjusted to maintain the internal
temperature of the aqueous NaOH below 16°C. At the end of the addition, the mixture
was neutralized by slow addition of 6N HCl to reach pH = 5-6. The resulting solid
was filtered, washed with water and dried in a vacuum oven overnight. 4-(cyclopropylamino)-2-(methylthio)pyrazolo[1,5-a][1,3,5]tnazine-8-carbaldehyde
was isolated as tan solid (9.26 g, 93%). LCMS (ES):>95% pure, m/z 250 [M+H]
+.
[0670] The following molecules were prepared using chemistries similar to
Example 196. Compounds were characterized by LCMS.
Example 197. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0671]

[0672] 4-(Cyclopropylamino)-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
(1.0 eq, 3.00 g, 12.03 mmol) was suspended in ethanol (40 ml). Hydantoin (1.5 eq,
1.81 g, 18.08 mmol) and piperidine (1.5 eq, 1.78 ml, 18.01 mmol) were added. The mixture
was heated at reflux under vigorous magnetic stirring for 3 hours. After cooling of
the reaction mixture, the precipitate was filtered, washed with ethanol, then with
a mixture of ethanol and water (1:1). After drying
in vacuo, (Z)-5-((4-(cyclopropylamino)-2-(methylthio)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
was isolated as a yellow solid (3.80 g, 95%). LCMS (ES):>85% pure, m/z 332 [M+H]
+.
[0673] The following molecules were prepared using chemistries similar to
Example 197. Compounds were characterized by LCMS.
Example 198. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0674]

[0675] (Z)-5-((4-(Cyclopropylamino)-2-(methythio)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(1.0 eq, 3.00 g, 9.05 mmol) was suspended in dichloromethane (150 ml).
m-cpba (77% purity grade, 5.0 eq, 10.1 g, 45.06 mmol) was added and the mixture stirred
at room temperature for 4 hours. The reaction was diluted by addition of dichloromethane
(500 ml). The solid was filtered and washed with dichloromethane. After drying a (1:1)
mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
was isolated as a yellow solid (2.67 g, 81%). LCMS (ES):>85% pure, m/z 364 [M+H]
+ and m/z 398 [M+H]
+. The mixture was used for next step without any separation of the molecules.
[0676] The following mixtures of sulfones and sulfoxides were prepared using chemistries
similar to
Example 198. Compounds were characterized by LCMS.
Example 199. Synthesis of (Z)-5-((2-(3-chlorophenylamino)-4-(cyclopropylamino)-pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0677]

[0678] A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(15 mg) was mixed with 3-chloroaniline (0.1 ml) in NMP (0.2 ml) and the mixture heated
in a microwave oven at 120°C for 15 min. Methanol was added and the resulting solid
filtered and dried to provide (Z)-5-((2-(3-chlorophenylamino)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as a solid (7 mg). LCMS (E):>95% pure, m/z 411 [M+H]
+.
Example 200. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(cyclopropylmethylamino)-pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0679]

[0680] A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(36 mg) was suspended in NMP (0.2 ml). Cyclopropylmethylamine (88 uL) was added and
the mixture stirred at room temperature for 15 minutes. Water and methylene chloride
were added and the resulting precipitate was filtered. After triturating in a mixture
of ethyl acetate and hexanes, (Z)-5-((4-(cyclopropylamino)-2-(cyclopropylmethylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)
methylene) imidazolidine-2,4-dione was isolated as a yellow solid.). LCMS (ES):>95%
pure, m/z 355 [M+H]
+.
Example 201. Synthesis of (Z)-5-((2-(3-chlorophenoxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0681]

[0682] A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(1.0 eq, 25 mg, 0.0704 mmol) was combined in a vial with 3-chlorophenol (5.0 eq, 45
mg, 0.35 mmol) and K
2CO
3 (5.0 eq, 48 mg, 0.347 mmol) in NMP (0.2 ml). The mixture was stirred at 90°C for
1 hour. Water was added and the resulting solid was filtered and dried. Trituration
in a mixture of ethyl acetate and hexanes followed by filtration provided (Z)-5-((2-(3-chlorophenoxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as a tan solid (20 mg, 69%). LCMS (E):>95% pure, m/z 412 [M+H]
+.
Example 202. Synthesis of (1r,4r)-4-(4-(cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)-N-methylcyclohexanecarboxamide
[0683]

[0684] (1r,4r)-4-(4-(Cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)cyclohexanecarboxylic
acid (1 eq, 12 mg, 0.028 mmol) was mixed in NMP (0.4 ml) with methyl amine hydrochloride
(8 eq, 15 mg, 0.225 mmol), HOBt.H
2O (2 eq, 8 mg, 0.056 mmol), DIEA (4 eq, 14 uL, 0.113 mmol) and EDCI (4 eq, 22 mg,
0.113 mmol). The mixture was stirred at 70°C for 2.5 hours. Water was added and the
precipitate filtered to afford (1r,4r)-4-(4-(cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)-N-methylcyclohexanecarboxamide.
LCMS (E):>95% pure, m/z 440 [M+H]
+.
Example 203. Synthesis of (1r,4r)-4-(4-(cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)cyclohexanecarboxamide
[0685]

[0686] (1r,4r)-4-(4-(Cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)cyclohexanecarboxylic
acid (1 eq, 12 mg, 0.028 mmol) was mixed in NMP (0.4 ml) with ammonium chloride (8
eq, 12 mg, 0.225 mmol), HOBt.H
2O (2 eq, 8 mg, 0.056 mmol), DIEA (4 eq, 14 uL, 0.113 mmol) and EDCI (4 eq, 22 mg,
0.113 mmol). The mixture was stirred at 70°C for 2.5 hours. Water was added and the
precipitate filtered to afford (1r,4r)-4-(4-(cyclopropylamino)-8-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-ylamino)cyclohexanocarboxamide.
LCMS (ES):>95% pure, m/z 426 [M+H]
+.
Example 204. Synthesis of (Z)-5-((2-((1r,4r)-4-aminocyclohexylamino)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
[0687]

[0688] A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methy)sulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(1.0 eq, 16 mg, 0.0451 mmol) was reacted with
trans-1,4-diaminocyclohexane (20.0 eq, 103 mg, 0.902 mmol) in NMP (0.4 ml) at room temperature
for 3 hours. Water and methanol was added and the material was purified by preparative
HPLC. Genevac evaporation provided (Z)-5-((2-((1r,4r)-4-aniinocyclohoxylamino)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (15 mg). LCMS (ES):>95% pure, m/z 398 [M+H]
+.
Example 205. Synthesis of tert-butyl cyclopropyl(2-(3-trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazin-4-yl)carbamate
[0689]

[0690] Di-
tert-butyl dicarbonate (327 mg, 1.50 mmol) and DMAP (6 mg, 0.05 mmol) were added to
N-cyclopropyl2-(methylthio)pyrazolo[1,5-
a][1,3,5]triazin-4-amine (221 mg, 1 mmol) dissolved in dichloromethane (4 mL). After
15 h, the solution was diluted with EtOAc (100 mL) and washed successively with water
(3 x 100 mL) and brine (100 mL). The organic layer was dried over MgSO
4, filtered and concentrated
in vacuo to an orange oil. The residue was purified via flash column chromatography (10% EtOAc/hexanes)
to afford
tert-butyl cyclopropyl(2-(methylthio)pyrazolo[1,5-
a][1,3,5]triazin-4-yl)carbamate (368 mg, 79%). LCMS (ES): >95% pure, m/z 322 [M+1]
+.
Example 206. Synthesis of tert-butyl cyclopropyl(2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazin-4-yl)carbamate
[0691]

[0692] Note: THF was degassed with a stream of N
2 for 10 min. in a separate flask.
Tert-butyl cyclopropyl(2-(methylthio)pyrazolo[1,5-
a][1,3,5]triazin-4-yl)carbamate (100 mg, 0.31 mmol), 3-(trifluoromethoxy)phenyl boronic
acid (154 mg, 0.74 mmol), tri(2-furyl)phosphine (86 mg, 0.37 mmol), copper(I) thiophene-2-carboxylate
(167 mg, 0.88 mmol), Pd
2dba
3 (24 mg, 0.03 mmol) were combined. The flask was evacuated and backfilled with N
2. THF (3.7 mL) was added and the reaction was heated to 50°C for 5 d. The solution
was diluted with Et
2O (40 mL) and washed with 10% NH
4OH (3 x 30 mL). The organic layer was dried over MgSO
4, filtered and concentrated
in vacuo. The solid residue was triturated with H
2O and filtered. The filtrate was concentrated
in vacuo and purified via flash column chromatography (2.5-5% EtOAc/hexanes) to afford
tert-butyl cyclopropyl(2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazin-4-yl)carbamate
(116 mg, 85%). LCMS (ES): >95% pure, m/z 436 [M+1]
+.
Example 207. Synthesis of 4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
[0693]

[0694] Tert-butyl cyclopropyl(2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazin-4-yl)carbamate
was dissolved in dichloromethane (0.7 mL) and trifluoroacetic acid (0.7 mL). After
1 h, the solution was concentrated under a stream of air to give crude 4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
which was used without further purification. LCMS (ES): >90% pure, m/z 336 [M+1]
+. 4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
(87 mg, 0.26 mmol) was dissolved in DMF (0.8 mL). Phosphorus(V) oxychloride (318 µL,
3.47 mmol) was added was added dropwise and the reaction was heated to 70 °C. After
6 h, the solution was added dropwise to 6M NaOH (∼10 mL) cooled to 0 °C. The pH was
adjusted to 7 by the addition of 12N HCl. The precipitate was filtered off and dried
in vacuo to furnish 4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazine-8-carbaldehyde
(71 mg, 75%) as a tan solid. LCMS (ES): >95% pure, m/z 364 [M+1]
+.
Example 208. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyrazolo[1,5-a][1,3,5]triazine-8-yl)methylene)imidazolidine-2,4-dione
[0695]

[0696] (
Z)-5-((4-(cyclopropylamino)-2-(3-(trifluoromethoxy)phenyl)pyzazolo[1,5-
a][1,3,5]triazine-8-yl)methylene)imidazolidine-2,4-dione was prepared using chemistries
similar to those exemplified in
Example 197. LCMS (ES): >90% pure, m/z 446 [M+1]
+.
Scheme 1
[0698] The compounds described in the following table can be prepared using chemistries
described on Figure 7.

[0699] The following molecules can be prepared using chemistries similar to
Example 206,
Example 207 and
Example 208.

[0700] The molecules described in Figure 8 were prepared using chemistries described in
Example 201, using bases such as K
2CO
3 or sodium hydride.
OTHERS
[0701] The chemistry described on Figure 9 can be used to prepare analogs of formula
11. 4-bromo-6-chloropyridazin-3-amine 1 can be reacted with
2 using conditions analogous to the preparation described in the patent application
WO2009/100375 to form compound
3. Compound
3 can react with amine R
8R
7NH to form compound
4. Compound
4 can be transformed to compound
5 by nucleophilic substitutions with amines, anilines, alcohols, phenols or thiophenols,
in the presence of a base, or by transition metal catalyzed conversions such as Suzuki
coupling with boronic acid or esters of formula WB(OR.)
2. Compound
5 can be transformed to compound
6 by reduction with LiAlH
4. Alcohol
6 can be converted to aldehyde
7 by oxidation with DCC or under Swern conditions. Compound
5 can react with an organometallic reagent exemplified by Grignard reagent R
4MgX to form secondary alcohol
8. This compound can be converted to alkylketone
9 under conditions analogous to the conditions used to convert
6 into
7. Compounds
7 and
9 can both be converted to compound
11 by condensation with
10 in a solvent such as ethanol and in the presence of a base such as piperidine.
[0702] The compounds described in the following table can be prepared using chemistry described
on Figure 9.
[0703] Figures 10-14 illustrate other synthesis methods that can be used to prepare compounds
of the invention.

Example 209. Synthesis of 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0704]

[0705] Step A. To 5,7-dichloropyrazolo[1,5-a]pyrimidine (200 mg, 1.06 mmol) in acetonitrile
was added Et
3N (148 µl, 1.06 mmol) and cyclopropylamine (75 µl, 1.06 mmol). The reaction was heated
at 80°C overnight. The mixture was concentrated under reduced pressure, dissolved
in dichloromethane, and washed with water. The resulting organic layer was dried over
Na
2SO
4 and concentrated under reduced-pressure to afford 156 mg of 5-chloro-N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine
(70% yield). LCMS (M+1=209)

[0706] Step B. To 5-chloro-N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine (156 mg, 0.75 mmol)
in DMF was added POCl
3 (205 µl, 2.25 mmol). The mixture was stirred at room temperature for 3 hours. Ice
was added to quench POCl
3, and then the mixture was neutralized with 1 M NaOH. Dichloromethane was added and
the product was extracted three times. The organic layer was dried over Na
2SO
4 and concentrated under reduced pressure to yield 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
Some residual DMF could not be removed. LCMS (M+1=237)

[0707] Step C. To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(177 mg, 0.75 mmol) in 1,4-dioxane was added 3-chloroaniline (397 µl, 3.75 mmol).
The mixture was heated in microwave at 1.20°C for 60 minutes. Precipitate was filtered
off, and the filtrate was prepared by TLC (1% methanol/dichloromethane) to yield 26
mg (11% yield) of 5-(3-chloxophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
LCMS (M+1=328)

[0708] Step D. To 5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(26 mg, 0.08 mmol) in EtOH was added hydantoin (8 mg, 0.08 mmol) and piperdine (8
µl, 0.08 mmol). The mixture was stirred at 70°C for 3 days. Insolubles were filtered
off, and filtrate was concentrated under reduced pressure. Filtrate was then dissolved
in methanol and purified by HPLC to yield 5-(5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=410)
Example 210. Synthesis of 5-((7-(cypropylamino)-5-(isobutylamino)pyrazolo[1,5-a][pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0709]

[0710] Step A. To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(440 mg, 1.86 mmol) in EtOH was added thiazolidine-2,4-dione (458 mg, 3.91 mmol) and
piperidine (208 µl, 2.05 mmol). The reaction was heated at 80°C overnight. 3 mL Isopropanol
was added in the morning, along with 218 mg thiazolidine-2,4-dione, 94 µL piperdine.
Temperature was increased to 90°C and left overnight. Precipitate was filtered while
hot and dissolved in methanol. 1 mL of 1M HCl was added and the mixture sonicated.
Precipitate was filtered and washed with methanol to yield 340 mg (54% yield) 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
as a yellow powder. LCMS (M+1=336)

[0711] Step B. To 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
(30 mg, 0.09 mmol) in N-methylpyrrolidinone (NMP) was added 2-methylpropan-1-amine
(20 mg, 0.268 mmol). The reaction was heated at 130°C overnight. Mixture was diluted
with methanol and prepared by HPLC to yield 5-((7-(cyclopropylamino)-5-(isobutylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione.
LCMS (M+1=373)
Example 211. Synthesis of 5-((7-(cyclopropylamino)-5-(2-hydroxypropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0712]

[0713] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=375)
Example 212. Synthesis of 5-((7-(cyclopropylamino)-5-(diethylamino)pyrazolo [1,5-a]pyrimidin-3yl)methylene)thiazolidine-2,4-dione
[0714]

[0715] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=373)
Example 213. Synthesis of 5-((7-(cyclopropylamino)-5-(dimethylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0716]

[0717] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=345)
Example 214. Synthesis of 5-((7-(cyclopropylamino)-5-(methyl(1-methylpyrrolidin-3-yl)amino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0718]

[0719] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=414)
Example 215. Synthesis of 5-((7-(cyclopropylamino)-5-(2-fluoroethylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0720]

[0721] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=363)
Example 216. Synthesis of 5-((7-(cyclopropylamino)-5-(4-methyl-1,4-diazepan-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0722]

[0723] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=414)
Example 217. Synthesis of 5-((7-(cyclopropylamino)-5-(2-(diethylamino)ethylamino)-pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0724]

[0725] The titled compound was prepared using a method analogous to that described for Example
210. LCMS (M+1=416)
Example 218. Synthesis of 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0726]

[0727] To 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
(20 mg, 0.06 mmol) in NMP was added 3-chloroaniline (38 µL, 0.36 mmol) and few granules
p-toluenesulfonic acid. The reaction was heated in microwave at 180°C for 1.5 hours.
Mixture was filtered and prepared by HPLC then preparative TLC (1% methanol/dichloromethane)
to yield 5-((5-(3-chlorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
as a yellow solid. LCMS (M+1=427)
Example 219. Synthesis of 5-((7-(cyclopropylamino)-2,5-dimethylpyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0728]

[0729] Step A. 7-(Cyclopropylamino)-2,5-dimethylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
was prepared from N-cyclopropyl-2,5-dimethylpyrazolo[1,5-a]pyrimidin-7-amine using
methods analogous to those described in Example 209, Step B. LCMS (M+1=231)

[0730] Step B. To 7-(cyclopropylamino)-2,5-dimethylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(0.25 mmol) in DMF was added thiazolidine-2,4-dione (88 mg, 0.75 mmol) and piperidine
(25 µl, 0.25 mmol). The mixture was stirred at room temperature overnight. Mixture
was prepared by HPLC to yield 5-((7-(cyclopropylamino)-2,5-dimethy)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione.
LCMS (M+1=330)
Example 220. Synthesis of 5-((7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)thiazolidine-2,4-dione
[0731]

[0732] Step A. 7-(Cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde was prepared
from N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine using the methods described in
Example 219, Step A. LCMS (M+1=203)

[0733] Step B. The titled compound was prepared from 7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
using methods analogous to those described in Example 219, Step B, except the product
was isolated by filtration, washed with methanol, and air dried. LCMS (M+1=302)
Example 221. Synthesis of 5-((7-(cyclopropylamino)-5-(4-pyridin-2-yl)piperazin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl-methylene)imidazolidine-2,4-dione
[0734]

[0735] Step A. To 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(400 mg, 1.70 mmol) in EtOH was added hydantoin (86mg, 1.86mmol) and pyrrolidine (14µL,
0.17mmol). The reaction was stirred at 70°C over weekend. Precipitate was filtered
and air dried to yield 180mg (33% yield) 5-((5-chloro-7-(cyclopropylamino)pyrazolo-[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=319)

[0736] Step B. To 5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(30 mg, 0.09 mmol) in 1,4-dioxane was added 1-(pyridin-2-yl)piperazine (58 µL, 4.10
mmol) and Et
3N (13µL, 0.09 mmol). Reaction was then heated 120°C for 35 minutes in microwave. Solvent
was removed under reduced pressure, and mixture was dissolved in methanol. Solid was
isolated by filtration, then air dried to yield 11 mg (26% yield) 5-((7-(cyclopropylamino)-5-(4-(pyridin-2-yl)piperazin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
LCMS (M+1=446)
Example 222. Synthesis of 5-((7-(cyclopropylamino)-5-(4-ethylpiperazin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0737]

[0738] The titled compound was prepared using methods analogous to those described for Example
221, Step B, with the following alteration. The solvent was removed under reduced
pressure, and the mixture was dissolved in methanol. The mixture was filtered, and
the filtrate was concentrated under reduced pressure to provide 18 mg (48% yield)
of the product as a yellow solid. LCMS (M+1=397)
Example 223. Synthesis of (Z)-5-((4-cyclopropylamino)-2-(3,4-dimethylbenzylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0739]

[0740] A solution of (3,4-dimethylphenyl)methanamine in NMP (106 µl, 0,4 M, 1.5 eq, 0.042
mmol) was transferred in a glass reaction vial. A solution of a (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
in NMP (100µl, 0.282M, 1.0 eq, 0.0282 mmol) was added. The mixture was heated at 80
°C for 5 hours. NMP was added (0.7 ml) and the solution subjected to preparative HPLC
purification. Genevac evaporation provided (Z)-5-((4-(cyclopropylamino)-2-(3,4-dimethylbenzylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as a solid (5.8 mg). LCMS (E):>85% pure, m/z 419 [M+H]
+.
Example 224. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(1-(pyridin-2-yl)ethylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0741]

[0742] A (2:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(1.0 eq, 3.6 g, 10.08 mmol) was suspended in 2-propanol (40 ml).
Rac-1-pyridinil-2-yl-ethylamine (2.0 eq, 2.47 g, 20.22 mmol) was added and the mixture
stirred at 90 °C for 6.5 hours. The mixture was cooled down and the solid isolated
by filtration. After drying in a vacuum oven, (Z)-5-((4-(cyclopropylamino)-2-(1-(pyridin-2-yl)ethylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)inudazolidine-2,4-dione
was isolated as a pale yellow solid (3.60 g, 88%). LCMS (ES):>95% pure, m/z 406 [M+H]
+.
Example 225. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(1H-imidazol-1-yl)pyrazolol[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0744]

[0745] A mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (2)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione(10mg,
0.028 mmol) was mixed with imidazole (6 mg, 0.084 mmol) in isopropanol (1 mL). The
mixture was stirred at 80°C for 16h. The reaction mixture was cooled to room temperature
and the resulting solid was filtered off and washed with isopropanol. The solid was
dried under vacuum to provide (Z)-5-((4-(cyclopropylamino)-2-(1H-imidazol-1-yl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as a yellow solid. LCMS (ES):>95% pure, m/z 352 [M+H]
+.
Example 226. Synthesis of (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxoimidazolin-4-ylidene)methyl)[1-5-a][1,3,5]triazin-2-yl)-1H-benzo[d]imidazole-5-carboxylic
acid.
[0746]

[0747] A mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylcene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(10 mg, 0.028 mmol) was mixed with 1H-benzo[d]imidazole-5-carboxylic acid (20 mg,
0.140 mmol) in isopropanol (1 mL). The mixture was stirred under microwave heating
at 150°C for 20 minutes. The solvent was removed to provide (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-yl)-1H-benzo[d]imidazole-5-carboxylic
acid as a crude mixture which was taken on to the next step without further purification.
LCMS (ES):>95% pure, m/z 446 [M+H]
+
Example 227. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(5-(4-ethylpiperazine-1-carbonyl)-1H-benzo[d]imidazol-1-yl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0748]

[0749] To (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-yl)-1H-benzo[d]imidazole-5-carboxylic
acid (15 mg, 0.034 mmol) in DMF (2 mL) was added EDCI (65 mg, 0.34 mmol), HOBt (46
mg, 0.34 mmol), and 1-ethylpiperazine (44 µL, 0.34 mmol). The mixture was stirred
at 50 °C for 1h. The reaction mixture was cooled to room temperature, filtered through
PTFE filter, and purified by mass-directed LC/MS to provide (Z)-5-((4-(cyclopropylamino)-2-(5-(4-ethylpiperazine-1-carbonyl)-1H-benzo[d]imidazol-1-yl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as the TFA salt. LCMS (ES):>95% pure, m/z 542 [M+H]
+.
Example 228. Synthesis of (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxomidazolidin-4-ylidene)methyl)pyrazolo[1.5-a][1,3,5]triazin-2-yl)-1H-imidazole-4-carbaldehyde.
[0750]

[0751] A mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(20 mg, 0.056 mmol) was mixed with 1H-imidazole-4-carbaldehyde (16 mg, 0.168 mmol)
in isopropanol (2 mL). The mixture was stirred under microwave heating at 150 °C for
20 minutes. The reaction mixture was cooled to room temperature and the solvent was
removed by rotary evaporation to provide (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-yl)-1H-imidazole-4-carbaldehyde
as a crude mixture which was taken on to the next step without further purification.
LCMS (ES):>95% pure, m/z 380 [M+H]
+
Example 229. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-(4-pyrrolidin-1-ylmethyl)-1H-imidazol-1-yl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0752]

[0753] To (Z)-1-(4-(cyclopropylamino)-8-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a][1,3,5]triazin-2-yl)-1H-imidazole-4-carbaldehyde
(7 mg, 0.018 mmol) in DCE (1 mL) was added pyrrolidine (10 mg, 0.144 mmol) and sodium
triacetoxyborohydride (36 mg, 0.144 mmol). The reaction mixture was stirred under
microwave heating at 120°C for 10 minutes. Dilute with DMSO (1 mL) and filter through
PTFE filter. Purified by mass-directed LC/MS to provide (Z)-5-((4-(cyclopropylamino)-2-(4-(pyrrolidin-1-ylmethyl)-1H-imidazol-1-yl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as the TFA salt. LCMS (ES):>95% pure, m/z 435 [M+H]
+
[0754] The compounds in the following table were prepared using chemistries described in
Examples 225 to 229.Table 38B shows the biological activities of the compounds listed in Table 38A.
Table 38B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| R33 |
<0.01 |
>1.0 |
3.45 |
4.67 |
| S33 |
<0.01 |
>1.0 |
6.40 |
5.20 |
| T33 |
<0.01 |
>1.0 |
1.03 |
1.25 |
| U33 |
<0.01 |
>1.0 |
12.21 |
23.77 |
| V33 |
<0.1 |
>1.0 |
|
|
| W33 |
<0.01 |
>1.0 |
0.74 |
0.78 |
| X33 |
<0.01 |
>1.0 |
>30 |
>30 |
| Y33 |
<0.1 |
>1.0 |
|
|
| Z33 |
<0.1 |
>1.0 |
14.60 |
15.71 |
| A34 |
<0.1 |
>1.0 |
|
|
| B34 |
<1 |
>1.0 |
|
|
| C34 |
<0.1 |
>1.0 |
|
|
| D34 |
<1 |
>1.0 |
|
|
Example 230. Synthesis of (Z)-5-((2-(3-chlorophenoxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0755]

[0756] A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(1.0 eq, 25 mg, 0.0704 mmol) was combined in a vial with 3-chlorophenol (5.0 eq, 45
mg, 0.35 mmol) and K
2CO
3 (5.0 eq, 48 mg, 0.347 mmol) in NMP (0.2 ml). The mixture was stirred at 90°C for
1 hour. Water was added and the resulting solid was filtered and dried. Trituration
in a mixture of ethyl acetate and hexanes followed by filtration provided (Z)-5-((2-(3-chlorophenoxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
as a tan solid (20 mg, 69%). LCMS (ES):>95% pure, m/z 412 [M+H]
+.
Example 231. Synthesis of (Z)-5-((2-(benzyloxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione.
[0758]

[0759] Benzyl alcohol (14.2 µL, 0.138 mmol) was dissolved in NMP (0.2 ml). Sodium Hydride
(60%, 5.5 mg, 0.138 mmol) was added and the reaction stirred at room temperature for
one hour. A (1:1) mixture of (Z)-5-((4-(cyclopropylamino)-2-(methylsulfonyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
and (Z)-5-((4-(cyclopropylamino)-2-(methylsulfinyl)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
(10 mg, 0.027 mmol) was added and the mixture was stirred at room temperature for
one hour. Water was added and the material was extracted with ethyl acetate. After
concentration at the rotary evaporator, addition of methanol formed a precipitate
that was filtered and dried. (Z)-5-((2-(benxyloxy)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
was isolated as a solid (5.6 mg). LCMS (ES):>95% pure, m/z 392 [M+H]
+.
[0760] The following compounds were prepared using conditions similar to
Example 231. Table 40B shows the biological activities of the compounds listed in Table 40A.
Table 40B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| L36 |
<0.01 |
>1.0 |
|
|
| M36 |
<0.01 |
>1.0 |
|
|
| N36 |
|
>1.0 |
|
|
Example 232. Synthesis of 3-((1r,4r)-4-7-(cyclopropylamino)-3-((Z)-2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)-1,1-dimethylurea
2,2,2-trifluoroacetate
[0761]

[0762] (Z)-5-((5-((1r,4r)-4-aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (10 mg) and DIEA (1.2 eq, 4.1 ul) were mixed in dry NMP (0.1
ml). Dimethylcarbamic chloride (1.0 eq, 1.8 ul) was added and the mixture stirred
at room temperature overnight. The reaction was diluted with NMP (1.5 ml) and a few
drops of water. The compound was purified by preparative HPLC and was isolated after
evaporation at the genevac. 3-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)-1,1-dimethylurea
2,2,2-trifluoroacetate. LCMS (ES):>95% pure, m/z 468 [M+H]
+. Z:E ratio: 86:13.
Example 233. Synthesis of N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)acetamide
[0763]

[0764] (Z)-5-((5-((1r,4r)-4-aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (1.0 eq, 10 mg, 0.0196 mmol) and DIEA (1.2 eq, 4 ul, 0.0229
mmol) were dissolved in NMP (0.1 ml). Acetic anhydride (1.0 eq, 2 ul, 0.0211 mmol)
was added and the mixture stirred at room temperature overnight. Water was added and
the resulting precipitate was filtered and dried to provide N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo(1,5-a]pyrimidin-5-ylamino)cyclohexyl)acetamide
as a solid (8 mg). LCMS (ES):>95% pure, m/z 439 [M+H]+.
Example 234. Synthesis of N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)propionamide
2,2,2-trifluoroacetate.
[0765]

[0766] Z)-5-((5-((1r,4r)-4-aminocyclohexylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (1.0 eq, 10 mg, 0.0195 mmol) was suspended in NMP (0.05 ml).
A NMP solution of propionic acid (1.2 eq, 60 uL of 0.4 M solution, 0.0234 mmol), HOBt
(1.5 eq, 4 mg, 0.030 mmol), DIEA (2.5 eq, 8 uL, 0.048 mmol) and EDCI 1.5 eq, 6 mg,
0.03 mmol) were added and the mixture stirred at 70°C for 1.5 hours. Water and NMP
was added and the product was purified by preparative HPLC. Genevac evaporation provided
N-((1r,4r)-4-(7-(cyclopropylamino)-3-((Z)-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)cyclohexyl)propionamide
2,2,2-trifluoroacetate (2.8 mg), LCMS (ES):>90% pure, m/z 453 [M+H]+.
Example 235. Synthesis of (Z)-5-((4-(cyclopropylamino)-2-((1r,4r)-4-(isobutylamino)cyclohexylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
2,2,2-trilluoroacetate.
[0767]

[0768] (Z)-5-((2-((1r,4r)-4-aminocyclohexylamino)-4-(cyclopropylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate (1.0 eq, 10 mg, 0.025 mmol) was suspended in dichloroethane.
Isobutyraldehyde (4 eq, 9.2 uL, 0.101 mmol), DIEA (1.0 eq, 0.025 mmol) and NaBH(OAc)
3 (4 eq, 21 mg, 0.101 mmol) were added and the mixture was stirred at room temperature
for two hours. The mixture was diluted with water and NMP and subjected to preparative
HPLC purification. Genevac evaporation provided (Z)-5-((4-(cyclopropylamino)-2-((1r,4r)-4-(isobutylamino)cyclohexylamino)pyrazolo[1,5-a][1,3,5]triazin-8-yl)methylene)imidazolidine-2,4-dione
2,2,2-trifluoroacetate as a solid (4.6 mg). LCMS (ES):>90% pure, m/z 454 [M+H]+.
Example 236. Synthesis of (Z)-5-((5-(3-chlorophenoxy)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione.
[0770]

[0771] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate (1.0 eq,
49 mg, 0.145 mmol) was mixed in a vial with NMP (0.2 ml), 3-chlorophenol (5.0 eq,
93 mg, 0.274 mmol) and potassium carbonate (5.0 eq, 100 mg, 0.723 mmol). The reaction
mixture was stirred at room temperature for one hour. Water was added and the resulting
gummy material was extracted with methylene chloride. The organic phase was dried
over Na
2SO
4 and the volatiles removed
in vacuo. The resulting NMP solution was reacted with a HCl 4N solution in dioxane (5 ml) at
room temperature for one hour, at which time LCMS monitoring indicated completion
of the reaction. The reaction was treated with water and 6N NAOH and stirred overnight
at room temperature. The solid was filtered and dried to afford crude 5-(3-chlorophenoxy)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
as a solid (31 mg). The material was heated with hydantoin (30 mg), piperidine (30
uL) in Ethanol (1 ml) in a vial at 90°C for seven hours. Water was added and the material
was filtered, washed with ethanol, ethanol/water and dried. (Z)-5-((5-(3-chlorophenoxy)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
was isolated as solid (43 mg, 38% over 2 steps).). LCMS (ES):>95% pure, m/z 411 [M+H]
+.
[0772] The following compounds were prepared using chemistry described in
Example 236. Table 42B shows the biological activities of the compounds listed in Table 42A.
Table 42B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| U38 |
<0.01 |
>2.5 |
10.724 |
20.865 |
| V38 |
<0.01 |
>2.5 |
1.377 |
5.205 |
Example 237. Synthesis of 4-(2-(2-chloro-3-nitrophenoxy)ethyl)morpholine
[0773]

[0774] 2-chloro-3-nitrophenol (1 g, 5.8 mmol) was dissolved in DMF (6 mL). K
2CO
3 (1.6 g, 11.5 mmol) was added and the solution changed from yellow to red. 4-(2-chloroethyl)morpholine
hydrochloride (1.07 g, 5.8 mmol) was added and the solution was allowed to stir for
15 h. The reaction was poured into H
2O (30 mL) and extracted with ETOAc (3 x 30 mL). The organics were washed with 1N NaOH
(100 mL) and brine (100 mL) and then dried over MgSO
4, filtered, and concentrated
in vacuo to provide 4-(2-(2-chloro-3-nitrophenoxy)ethyl)morpholine (1.4 g, 87%) as a golden
oil.
[0775] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 237. All compounds were characterized by LCMS.
| Compound |
Yield |
Compound |
Yield |

|
37 |

|
30 |
Example 238. Synthesis of 2-chloro-3-(2-morpholinoethoxy)aniline
[0776]

[0777] 4-(2-(2-chloro-3-nitrophenoxy)ethyl)morpholine (873 mg, 3.1 mmol) was dissolved in
toluene (12 mL). Ammonium formate (866 mg, 13.7 mmol) was dissolved in H
2O (12 mL) and added. Iron powder (<10 micron, 766 mg, 13.7 mmol) was added and the
reaction was placed in a 120°C oil bath. After 1.25 h, the solution was cooled to
23 °C and filtered over a pad of celite eluting with 10% MeOH/dichloromethane (250
mL). The filtrate was concentrated
in vacuo and the residue was purified via flash column chromatography to give 2-chloro-3-(2-morpholinoethoxy)aniline
(503 mg, 75%) as a golden oil.
[0778] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 238. All compounds were characterized by LCMS.
| Compound |
Yield |
Compound |
Yield |

|
90 |

|
76 |
Example 239. Synthesis of 2-chloro-4-(1H-pyrazol-1-yl)aniline
[0779]

[0780] 2-chloro-4-iodoaniline (760 mg, 3 mmol),
N,
N'-dimethylethylenediamine (96 µL, 0.9 mmol), 1
H-pyrazole (430 mg, 6.3 mmol) were dissolved in DMF (3.8 mL). Cs
2CO
3 (1.86 g, 5.7 mmol) and CuI (57 mg, 0.3 mmol) were added and the reaction was placed
in a 140°C oil bath. After 3 h, the volatiles were removed
in vacuo. The residue was diluted with dichloromethane and purified via flash column chromatography
(1% MeOH/dichloromethane) to furnish 2-chloro-4-(1
H-pyrazol-1-yl)aniline (540 mg, 93%) as a golden brown oil which crystallized overnight
at -20°C.
Example 240. Synthesis of 1-(3-chloro-4-nitrophenyl)-4-methylpiperazine
[0782]

[0783] 2-chloro-4-fluoronitrobenzene (1 g, 5.7 mmol) was dissolved in DMF (10 mL). 1-methylpiperazine
(760 µL, 6.8 mmol) and then K
2CO
3 (1.57 g, 11.4 mmol) were added and the reaction was placed in a 100 °C oil bath.
After 1 h, the solution was cooled to 23 °C, then added to H
2O (75 mL). The precipitate was filtered, washed with H
2O (≈25 mL), then dried overnight (50°C, 25 mmHg) to provide 1-3-chloro-4-nitrophenyl)-4-methylpiperazine
(1.28 g, 88%) as a maize colored solid.
[0784] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 240. All compounds were characterized by LCMS.
| Structure |
Yield |

|
97 |
Example 241. Synthesis of 2-chloro-4-(4-methylpiperazin-1-yl)aniline
[0785]

[0786] 1-3-chloro-4-nitrophenyl)-4-methylpiperazine (414mg, 1.62 mmol) was dissolved in
toluene (6.5 mL). Ammonium formate (461 mg, 7.3 mmol) was dissolved in H
2O (6.5 mL) and added. Iron powder (<10 micron, 408 mg, 7.3 mmol) was added and the
reaction was placed in a 120°C oil bath. After 1.25 h, the solution was cooled to
23 °C and filtered over a pad of celite eluting with 10% MeOH/dichloromethane (250
mL). The filtrate was concentrated
in vacuo and the residue was partitioned between H
2O (25 mL) and EtOAc (25 mL). The aqueous layer was further extracted with EtOAc (6
x 25 mL) and then dichloromethane (3 x 25 mL). The organics were dried over MgSO
4, filtered, and concentrated
in vacuo to afford 2-chloro-4-(4-methylpiperazin-1-yl)aniline (157 mg, 43%) as a light brown
solid.
[0787] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 241. All compounds were characterized by LCMS.
| Structure |
Yield |

|
89 |
Example 242. Synthesis of (Z)-tert-butyl 5-chloro-3-((2,5 dioxoimidazolidin-4-ylidine)methyl)pyrazolo[1,5-a]pyrimidine-7-yl(cyclopropyl)carbamate
[0788]

[0789] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (5.05 g, 15 mmol) was dissolved in anhydrous
THF (100 mL). Diethyl 2,5-dioxoimidazolidin-4-ylphosphonate (5.33 g, 22.5 mmol) and
NaO
t-bu (1.87 g, 19.5 mmol) were then added. After stirring for 3 d at 23 °C, additional
dimethyl 2,5-dioxoimidazolidin-4-ylphosphonate (3.5 g) and NaO
t-bu (1.44 g) were added. After stirring an additional 24 h, the volatiles were removed
in vacuo. The residue was stirred for 4 h in
i-PrOH (50 mL) and water (250 mL) and then filtered to afford crude
tert-butyl 5-chloro-3-((2,5dioxoimidazolidin-4-ylidine)methyl)pyrazolo[1,5-
a]pyrimidine-7-yl(cyclopropyl)carbamate (5.64 g, 90%) as a mixture of
Z:
E isomers (3.3:1). The crude solid was diluted with
i-PrOH (110 mL) and heated to reflux. The solution was filtered and then allowed to
cool to afford (Z)
-tert-butyl 5-chloro-3-((2,5dioxoimidazolidin-4-ylidine)methyl)pyrazolo[1,5-
a]pyrimidine-7-yl(cyclopropyl)carbamate (3.58 g, 57%) as a bright orange solid in two
crops.
1H NMR (CDCl
3, 400 MHz) δ: 10.37 (bs, 1H), 8.17 (s, 1H), 8.02 (bs, 1H), 6.81 (s, 1H), 6.60 (s,
1H), 3.26 (dddd, 1H,
J = 6.8, 6.8, 3.2, 3.2 Hz), 1.43 (s, 9H), 0.87-0.94 (m, 2H), 0.62-0.68 (m, 2H). LCMS
(ES): >90% pure, m/z 419 [M+1]
+.
Example 243. Synthesis of (Z)-5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-yl)methylene)imidazolidine-2,4-dione
[0791]

[0792] (Z)-
tert-butyl 5-chloro-3-((2,5dioxoimidazolidin-4-ylidine)methyl)pyrazolo[1,5-
a]pyrimidine-7-yl(cyclopropyl)carbamate (3.20 g, 7.66 mmol) was suspended in dichloromethane
(30 mL). Trifluoroacetic acid (30 mL) was added slowly and the solution became homogeneous.
After 1 h, the volatiles were removed
in vacuo. The residue was triturated in Et
2O (100 mL) and the bright yellow solid was filtered off to afford (
Z)-5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(2.42 g, 99%). LCMS (ES): >90% pure, m/z 319 [M+1]
+.
Example 244. Synthesis of (Z)-N-(3-(7-(cyclopropylamino)-3-(2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)phenyl)acetamide
[0793]

[0794] (
Z)-5-((5-chloro-7-(cyclopropylamino)pyrazolo[1,5-
a]pyrimidin-3-yl)methylene)imidaxolidine-2,4-dione (75 mg, 0.23 mmol) was suspended
in 1,4-dioxane (1.6 mL).
N-(3-aminophcnyl)acetamide (52 mg, 0.35 mmol), Cs
2CO
3 (105 mg, 0.32 mmol), (±)-BINAP (9 mg, 0.06 mmol) and palladium(II) acetate (7 mg,
0.04 mmol) were then added. The mixture was sealed and irradiated at 120 °C for 30
min in the microwave. H
2O (8 mL) was added and the precipitate was filtered off and dried. The crude residue
was purified via flash column chromatography (2.5-3.5% MeOH/dichloromethane) to yield
(Z)-
N-(3-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-ylamino)phenyl)acetamide (12 mg, 12%) as a bright yellow solid. LCMS
(ES): >90% pure, m/z 433 [M+1]
+.
Example 245. Synthesis of (Z)-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)-N-(2-(diethylamino)ethyl)-3-fluorobenzamide 2,2,2,-trifluoroacetate
[0796]

[0797] (Z)-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)-3-fluorobenzoic
acid (25 mg, 0.06 mmol) was suspended in DMF (0.2 mL). EDCI (13 mg, 0.7 mmol), HOBt
(11 mg, 0.7 mmol), triethylamine (10 µL, 0.7 mmol), and
N,N-diethylethylenediamine (8 µL, 0.7 mmol) were added sequentially. The reaction was
heated to 65 °C. After 1 h, the solution was diluted with DMSO (1 mL) and purified
by reverse phase HPLC to yield (
Z)-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5
-a]pyrimidin-5-ylamino)
-N-(2-(diethylamino)ethyl)-3-fluorobenzamide 2,2,2-trifluoroacetate (29 mg, 76%). LCMS
(ES): >90% pure, m/z 536 [M+1]
+.
[0798] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 245. All compounds were characterized by LCMS. Table 44B shows the biological activities
of the compounds listed in Table 44A.
Table 44B.
| Compound |
CK2: IC50 (um) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |
| J41 |
<0.01 |
33.546 |
1.288 |
10.863 |
| K41 |
<0.01 |
55.606 |
5.536 |
> 30 |
| L41 |
<0.01 |
55.104 |
8.434 |
13.38 |
| M41 |
<0.01 |
19.242 |
7.402 |
> 30 |
| N41 |
<0.1 |
75.247 |
2.764 |
> 30 |
| O41 |
<0.01 |
57.4 |
3.155 |
>30 |
| P41 |
<0.1 |
45.679 |
3.578 |
22.618 |
| Q41 |
<0.01 |
31.821 |
16.205 |
5.914 |
Example 246. Synthesis of 4-(7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
hydrochloride
[0799]

[0800] 5-chloro-
N-cyclopropylpyrazolo[1,5-
a]pyrimidin-7-amine (208 mg, 1 mmol) was suspended in EtOH (1 mL). 4-aminobenzonitrile
(236 mg, 2 mmol) and then conc. HCl (125 µL, 1.5 mmol) were added and the reaction
was placed in a 95 °C oil bath. After 24 h, additional conc. HCl was added (62 µL).
After an additional 24 h, the reaction was cooled to 23 °C and the filter cake was
washed with EtOH (2 mL) to afford 4-(7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
hydrochloride (205 mg, 63%) as a light brown solid. LCMS (ES): >90% pure, m/z 291
[M+1]
+.
Example 247. Synthesis of 4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0801]

[0802] 4-(7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile hydrochloride
(205 mg, 0.62 mmol) was dissolved in anhydrous DMF (1 mL) and the solution was cooled
to 0 °C by an external ice bath. POCl
3 (115 µL, 1.25 mmol) was added dropwise keeping the internal temperature <5 °C. After
addition, the ice bath was removed. After 5 h, the solution was poured into H
2O (20 mL) and the pH was adjusted to 11 by the addition of 6N NaOH. The solution was
allowed to stir for 1 h, and the precipitate was filtered off. The crude product was
triturated with EtOH (7 mL), filtered, and dried under high vacuum (1 mmHg) to provide
4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-ylamino)benzonitrile (129 mg, 64%) as an orange solid. LCMS (ES): >90%
pure, m/z 319 [M+1]
+.
Example 248. Synthesis of (Z)-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pirimidin-5-ylamino)benzonitrile
[0803]

[0804] 4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-ylamino)benzonitrile (75 mg, 0.24 mmol) was suspended in EtOH (2.4 mL).
Hydantoin (36 mg, 0.35 mmol) and piperidine (36 µL, 0.35 mmol) were added and the
reaction was heated to 80 °C. After 15 h, the solution was filtered while warm and
the filter cake was washed with warm EtOH (3 mL) to give (
Z)-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-ylamino)benzonitrile (76 mg, 80%) as a bright yellow solid. LCMS (ES):
>90% pure, m/z 401 [M+1]
+.
[0805] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Examples 246 to 248. All compounds were characterized by LCMS. Table 45B shows the biological activities
of the compounds listed in Table 45A.
Table 45B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |
| R41 |
<0.1 |
55.09 |
0.8 |
1.179 |
| S41 |
<0.01 |
-33.889 |
1.525 |
> 30 |
| T41 |
<0.01 |
43.69 |
1.96 |
1.901 |
| U41 |
<0.01 |
57.088 |
1.019 |
1.56 |
| V41 |
<0.01 |
16.198 |
0.352 |
3.08 |
Example 249. Synthesis of tert-butyl 5-(2-bromo-4-cyanophenylamino)-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0806]

[0807] Tert-butyl 5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate (225 mg,
0.67 mmol) and 4-amino-3-bromobenzonitrile (197 mg, 1 mmol) were dissolved in anhydrous
THF (4.5 mL). Sodium
tert-butoxide (96 mg, 1 mmol) was added in one portion. After 1.5 h, the reaction was
poured into H
2O (25 mL) and extracted with EtOAc (3 x 30 mL). The organics were washed with brine
(1 x 100 mL), dried over MgSO
4, filtered and concentrated
in vacuo. The tan solid was purified via flash column chromatography (30% EtOAc/hexanes) to
provide
tert-butyl 5-(2-bromo-4-cyanophenylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (106 mg, 32%) as a pale yellow solid. LCMS (ES):
>90% pure, m/z 497 [M+1]
+.
Example 250. Synthesis of 3-bromo-4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0808]

[0809] Tert-butyl 5-(2-bromo-4-cyanophenylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (105 mg, 0.21 mmol) was dissolved in dichloromethane
(2 mL) and trifluoroacetic acid (2 mL) was added. After 1 h, the reaction was concentrated
to dryness and the residue was triturated with Et
2O. The yellow solid was collected and dried to give 3-bromo-4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-
a]pyrimidin-5-ylamino)benzonitrile 2,2,2-trifluoroacetate (72 mg, 67%).
Example 251. Synthesis of (Z)-3-bromo-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0810]

[0811] 4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5
-a]pyrimidin-5-ylamino)benzonitrile 2,2,2-trifluroacetate (72 mg, 0.14 mmol) was suspended
in EtOH (2.4 mL). Hydantoin (17 mg, 0.17 mmol) and piperdine (33 µL, 0.34 mmol) were
added and the reaction was heated to 80 °C. After 15 h, the solution was filtered
while warm and the filter cake was washed with warm EtOH (3 mL) to give (
Z)-3-bromo-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-ylamino)benzonitrile (60 mg, 89%) as a bright yellow solid. LCMS (ES):
>90% pure, m/z 479 [M+1]
+.
[0812] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Examples 249 to 251. All compounds were characterized by LCMS. Table 46B shows the biological activities
of the compounds listed in Table 46A.
Table 46B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 (uM) |
AB: BxPC3 (uM) |
| W41 |
<0.01 |
45.045 |
0.162 |
2.047 |
| X41 |
<0.01 |
76.955 |
3.875 |
1.245 |
| Y41 |
<0.01 |
60.279 |
0.617 |
2.272 |
| Z41 |
<0.01 |
44.216 |
0.331 |
0.136 |
| A42 |
<0.01 |
43.425 |
0.457 |
0.446 |
| B42 |
<0.01 |
22.74 |
2.455 |
0.235 |
| C42 |
<0.01 |
10.041 |
1.798 |
1.206 |
Example 252. Synthesis of (Z)-4-(7-(cyclopropylamino)-3-((1-methyl-2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo)[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0813]

[0814] 3-methylimidazolidine-2,4-dione was prepared according to the literature procedure
setforth in
Eur. JOC 2002, 1763.
[0815] 4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile (51
mg, 0.16 mmol) was suspended in EtOH (1.6 mL). 3-methylimidazolidine-2,4-dione (28
mg, 0.24 mmol) and piperidine (24 µL, 0.24 mmol) were added and the reaction was heated
to 80 °C. After 15 h, the solution was diluted with H
2O (2 mL) and filtered. The filter cake was washed with 50% H2O/50% EtOH (3 mL) and
then dried
in vacuo (∼1mmHg) to furnish (Z)-4-(7-(cyclopropylamino)-3-((1-methyl-2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
(45 mg, 68%) as a bright yellow solid. LCMS (ES): >90% pure, m/z 415 [M+1]
+.
[0816] The compounds described in the following table were prepared using chemistries similar
to those exemplified in
Example 252. All compounds were characterized by LCMS. Table 47B shows the biological activities
of the compounds listed in Table 47A.
Table 47B.
| Compound |
CK2: IC50 (µM) |
PIM2: %inh 2.5 µM |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| D42 |
<0.1 |
-39.275 |
0.693 |
2.805 |
| E42 |
<0.1 |
-72.498 |
1.286 |
1.971 |
| F42 |
<0.1 |
-17.549 |
29.071 |
>30 |
Example 253. Synthesis of (Z)-3-chloro-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yloxy)benzonitrile
[0817]

[0818] (
Z)-
tert-butyl 5-chloro-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-7-yl(cyclopropyl)carbamate (75 mg, 0.18 mmol) was dissolved in anhydrous
DMF (0.6 mL).3-chloro-4-hydroxybenzonitrile (41 mg, 0.27 mmol) and K
2CO
3 (75 mg, 0.54 mmol) were added. After 24 h, H
2O (3.5 mL) was added to the reaction and the bright yellow precipitate was filtered
and dried. The crude solid was dissolved in dichloromethane (1 mL) and trifluroacetic
acid (1 mL). After 1 h, the reaction was concentrated to dryness and the residue was
triturated with Et
2O (3 mL) and filtered to provide (
Z)-3-chloro-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-
a]pyrimidin-5-yloxy)benzonitrile (45 mg, 57% over two steps) as a bright yellow solid.
Example 254. Synthesis of (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-3-(hydroxymethyl)imidazolidine-2,4-dione
[0819]

[0820] To (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione,
(500 mg, 1.17 mmol) in acetonitrile (15 mL) and pyridine (1.5 mL) was added formaldehyde
(37% aq) (5.0 mL).The reaction mixture was stirred at 65°C for 5 minutes. Cooled to
room temperature and filtered off the resulting solid. Washed with water and dried
under vacuum to provide 450 mg (84%) of (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-3-(hydroxymethyl)imidaxolidine-2,4-dione
as a yellow solid. LCMS (ES): >95% pure, m/z 458 [M+1]
+.
Example 255. Synthesis of (Z)-5-((4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidazolidin-1-yl)methoxy)-5-oxopentanoic
acid
[0821]

[0822] To (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-3-(hydroxymethyl)imidazolidine-2,4-dione
(100 mg, 0.218 mmol) in pyridine (4.5 mL) was added glutaric anhydride (125 mg, 1.095
mmol), and DMAP (3 mg, 0.022 mmol). The reaction mixture was stirred at 75°C overnight
after which the reaction was not complete. Added glutaric anhydride (125 mg, 1.095
mmol) and DMAP (3 mg, 0.022 mmol) and stirred an additional 16 hours at 75°C. Cooled
to 0°C in ice bath and added 6M HCl until pH was less than 3 by pH paper. Filtered
off the solid and washed with 0.1M HCl. Dried under vacuum to provide 40 mg (32%)
of (Z)-5-((4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidazolidin-1-yl)methoxy)-5-oxopentanoic
acid as a yellow solid. LCMS (ES): >95% pure, m/z 572 [M+1]
+.
Example 256. Synthesis of (Z)-(4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidazolidin-1-yl)methyl
3-(4-methylpiperazin-1-yl)propanoate
[0823]

[0824] To (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-3-(hydroxymethyl)imidazolidine-2,4-dione
(100 mg, 0.218 mmol) in DMF (3 mL) was added 3-(4-methylpiperazin-1-yl)propanoic acid
(75 mg, 0.436 mmol), dicyclohexylcarbodiimide (90 mg, 0.436 mmol), and DMAP (4.0 mg,
0.33 mmol). The reaction mixture was stirred at room temperature overnight and then
diluted with ethyl acetate and washed 1X water, 3X brine. The organic layer was dried
with MgSO
4, filtered and adsorbed onto silica gel. The crude material was purified by column
chromatography eluting with 0-10% MeOH/CH
2Cl
2 gradient. Pure fractions were combined and the solvent was removed. This material
was crystallized from ethyl acetate and hexane to provide 35 mg (26%) of (Z)-(4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidaxolidin-1-yl)methyl
3-(4-methylpiperazin-1-yl)propanoate as a yellow solid. LCMS (ES): >95% pure, m/z
612 [M+1]
+.
Example 257. Synthesis of (Z)-(4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidazolidin-1-yl)methyl
2-aminoacetate
[0825]

[0826] To (Z)-5-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-3-(hydroxymethyl)imidazolidine-2,4-dione
(100 mg, 0.218 mmol) in DMF (3 mL) was added Boc-Gly-OH (153 mg, 0.873 mmol), dicyclohexylcarbodiimide
(180 mg, 0.873 mmol), and DMAP (13 mg, 0.109 mmol). The reaction mixture was stirred
at room temperature overnight, then diluted with ethyl acetate and washed 1X with
1M HCl followed by 3X brine. The organic layer was dried with MgSO
4, filtered and adsorbed onto silica gel. The crude material was purified by column
chromatography eluting with 5-15% EtOAc/CH
2Cl
2 gradient. Pure fractions were combined and the solvent was removed. To the residue
was added 4M HCl/dioxane (4 mL) and stirred at room temperature for 2h. Removed excess
HCl/dioxane. To the residue was added diethyl ether and the suspension was sonicated.
The resulting solid was filtered off and washed with diethyl ether. Dried under vacuum
to provide 23 mg (21%) of (Z)-(4-((5-(5-chloro-2-fluorophenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)-2,5-dioxoimidazolidin-1-yl)methyl
2-aminoacetate hydrogen chloride as a yellow solid. (LCMS (ES): >95% pure, m/z 515
[M+1]
+.
[0827] The following molecules were prepared using chemistries similar to synthesis in examples
above. All compounds were characterized by LCMS. Table 48B shows the biological activities
of the compounds listed in Table 48A.
Table 48B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 IC50 (uM) |
AB: BxPC3 IC50 (u M) |
| G42 |
<0.01 |
65.361 |
0.232 |
1.104 |
| H42 |
<0.01 |
19.196 |
0.291 |
1.989 |
| I42 |
<0.01 |
42.049 |
0.25 |
1.143 |
| J42 |
<0.1 |
42.889 |
|
|
| K42 |
<0.1 |
-6.849 |
|
|
| L42 |
<0.01 |
79.506 |
0.898 |
0.946 |
| M42 |
<0.1 |
60.348 |
0.172 |
0.43 |
| N42 |
<0.01 |
23.501 |
0.222 |
0.539 |
| O42 |
<0.1 |
3.674 |
|
|
| P42 |
<0.1 |
13.383 |
|
|
| Q42 |
<0.01 |
-20.619 |
0.28 |
0.207 |
| R42 |
<0.1 |
|
|
|
Example 258. Synthesis of 5-((5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methynimidazolidine-2,4-dione
[0828]

[0829] To (Z)-5-((5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methyiene)imidazolidine-2,4-dione
(40 mg, 0.091 mmol) in a Parr pressure reaction vessel was added acetic acid (6.0
mL) and 10% Pd/C (20 mg). The reaction vessel was placed on the Parr shaker at 55
psi for 3 days. Filtered through celite and purified by mass-directed LC/MS to provide
5-((5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methyl)imidazolidine-2,4-dione
as the TFA salt. LCMS (ES): >95% pure, m/z 444 [M+1]
+.
Example 259. Synthesis of 2-chloro-4-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)phenol
[0830]

[0831] To 5-chloro-N-cyclopropylpyrazolo[1,5-a]pyrimidin-7-amine (500 mg, 2.396 mmol) in
EtOH (10 mL) was added 4-amino-2-chlorophenol (516 mg, 3.59 mmol) followed by concentrated
HCl (0.218 mL, 2.64 mmol). The reaction mixture was stirred at reflux temperature
for 4 days. Removed 5 mL of EtOH on rotavap followed by addition of 5 mL of diethyl
ether. The resulting solid was filtered off and rinsed with diethyl ether. Dried under
nitrogen to provide 582 mg (77%) of 2-chloro-4-(7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)phenol
as the HCl salt. LCMS (ES): >95% pure, m/z 316 [M+1]
+.
Example 260. Synthesis of 5-(3-chloro-4-hydroxyphenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0832]

[0833] To 2-chloro-4-(7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-5-ylamino)phenol (582
mg, 1.84 mmol) in DMF (4.5 mL) cooled to 0°C was added phosphorous oxychloride (0.514
mL, 5.52 mmol) dropwise. The reaction mixture was stirred while warming to 45°C over
3h. This was cooled down to 0°C and added slowly to an ice-cold solution of 2M NaOH
while stirring. Upon completion, the mixture was stirred at room temperature for 1h.
The resulting solid was filtered off and washed with water to provide 412 mg (65%)
of 5-(3-chloro-4-hydroxyphenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde.
LCMS (ES): >95% pure, m/z 344 [M+1]
+.
Example 261. Synthesis of 5-(3-chloro-4-(3-(dimethylamino)propoxy)phenylamino)-7-(cyclopropylamino)pyrazolo
[1,5-a]pyrimidine-3-carbaldehyde
[0834]

[0835] To 5-(3-chloro-4-hydroxyphenylamino)-7-(cyclopropylamino)pyraxolo[1,5-a]pyrimidine-3-carbaldehyde
(100 mg, 0.291 mmol) in DMF (3 mL) was added K
2CO
3 (100 mg, 0.727 mmol). The reaction mixture was stirred at 80°C for 16h. Diluted with
EtOAc and extracted into 2M HCl. The aqueous layer was basified to pH of 14 with 2M
NaOH and extracted 2X with EtOAc. The organic layer was washed 3X with brine and dried
with MgSO
4. Filtered and purified by column chromatography eluting with 10%-30% MeOH/EtOAc gradient.
Combined pure fractions to provide 45 mg (36%) of 5-(3-chloro-4-(3-(dimethylamino)propoxy)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
LCMS (ES): m/z 429 [M+1]
+.
Example 262. Synthesis of (Z)-5-((5-(3-chloro-4-(3-(dimethylamino)propoxy)phenylamino)-7-(cyclopropylamino)
pyrazolo[1,5-dipyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0836]

[0837] To 5-(3-chloro-4-(3-(dimethylamino)propoxy)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(79 mg, 0.184 mmol) in EtOH (3 mL) was added piperidine (22uL 0.221 mmol) followed
by hydantoin (21 mg, 0.202 mmol). The reaction mixture was stirred at 85°C for 6h.
The solvent was removed by rotary evaporation and the residue was diluted with 3 mL
of water. The suspension was sonicated and the resulting solid was filtered off and
washed with water followed by a 1:1 mixture of EtOH/water. The material was Dried
under vacuum to provide 62 mg of (Z)-5-((5-(3-chloro-4-(3-(dimethylamino)propoxy)phenylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
LCMS (ES): m/z 511 [M+1]
+.
[0838] The compounds listed in Table 49A were prepared according to the procedures described
above. Table 49B shows the biological activities of the compounds listed in Table
49A.
Table 49B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5uM |
AB: MDAMB453 IC50(uM) |
AB: BxPC3 IC50(uM) |
| S42 |
<0.01 |
44.49 |
2.739 |
5.005 |
| T42 |
<0.01 |
44.33 |
2.094 |
5.332 |
| U42 |
<0.01 |
48.912 |
1.087 |
2.463 |
Example 263. Synthesis of 7-(cyclopropylamino)-5-(methylthio)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0839]

[0840] To 5-chloro-7-(cyclopropylamino) pyrazolo [1,5-a] pyrimidine-3-carbaldehyde (4.0g,
16.87 mmol) in dimethylformamide was added sodium thiomethoxide (3.54 g, 50.5 mmol)
and the reaction mixture was heated to 80°C for 2 hrs. Cooled the reaction mixture,
added water, stirred for 15 minutes and filtered white precipitate, dried to yield
7-(cyclopropylamino)-5-(methylthio)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (3.60
g, 86% yield). LCMS (M+1=249)
Example 264. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(methylthio)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazoline-2,4-dione
[0841]

[0842] The above product 7-(cyclopropylamino)-5-(methylthio) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde
was dissolved in 20.0 mL ethanol, added hydantoin (2.82 g, 28.17 mmol) and piperidine
(2.70 mL). The reaction was heated to 80°C for overnight. Cooled the reaction mixture
and yellow precipitate was filtered, washed with ethanol, dried to yield (Z)-5-((7-(cyclopropylamino)-5-(methylthio)
pyrazolo [1, 5-a] pyrimidin-3-yl) methylene) imidazolidine-2, 4-dione 4.18 g (90%
yield). LCMS (M+1=331)
Example 265. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-methylsulfonyl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0843]

[0844] To (Z)-5-((7-(cyclopropylamino)-5-(methylthio) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (
step b) (4.2 g, 12.68 mmol) in 40.0 mL dichloromethane, was added meta-Chloroperoxybenzoic
acid (8.75 g, 50.7 mmols) and the reaction mixture was stirred at room temperature
overnight. Added another 10.0 mL of dichloromethane, sonicated for 10 minutes and
then filtered the yellow precipitate to yield (Z)-5-((7-(cyclopropylamino)-5-(methylsulfonyl)
pyrazolo [1, 5-a] pyrimidin-3-yl) methylene) imidazolidine-2,4-dione (3.7 g, 73% yield).
LCMS (M+1=363)
Example 266. Synthesis of (S,Z)-5-((5-(1-(3-chlorophenyl)ethylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazoline-2,4-dione
[0845]

[0846] To (Z)-5-((7-(cyclopropylamino)-5-(methylsulfonyl) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2,4-dione (
step c) (10 mg, 0.0275 mmol) in 200 uL NMP, was added (S)-1-(3-chlorophenyl) ethanamine
(23.2 ul, 0.165 mmols) and the reaction mixture was heated in the microwave at 120
°C for 20 minutes. The mixture was concentrated and diluted with MeOH and purified
by preparative HPLC to yield (S,Z)-5-((5-(1-(3-chlorophenyl)ethylamino)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
LCMS (M+1=438)
Example 267. Synthesis of 5,7-dichloro-6-methylpyrazolo[1,5-a]pyrimidine
[0848]

[0849] Under nitrogen gas atmosphere, sodium (3.5 g, 151 mmol) was added to ethanol (125
mL) in small portions and stirred at room temperature until all the sodium had dissolved.
A solution of 3-aminopyrazole (12.5 g, 150 mmol) in ethanol (20 mL) and diethyl methylmalonate
(26 mL, 153 mmol) were dropped, successively, to the above solution. The mixture was
refluxed at 90°C for 10 hours, cooled to room temperature, and filtered under vacuum.
To the solid, cold 5N HCl was added and the resulting solid was collected by filtration
under vacuum. The intermediate, 6-methylpyrazolo[1,5-a]pyrimidine-5,7-diol, was recovered
as an off-white solid in 72% yield (17.9g). This material was used for the next step
without further purification. LCMS (M+1=166)
[0850] Under nitrogen gas atmosphere, phosphorous oxychloride (160 mL, 1.72 mol) and dimethylaniline
(16 mL, 132 mmol) was added successively to the intermediate prepared above (16 g,
97 mmol). The mixture was heated at 110°C for 4 hours then excess POCl
3 was removed under vacuum. The residue was made basic with 3N NaOH solution (pH =
9-10) and extracted with ethyl acetate (3x). The combined organic layers were dried
over anhydrous Na
2SO
4, filtered, and concentrated under vacuum. The residue was purified by silica gel
chromatography (100% DCM) to provide 15.8 grams of the solid yellow product, 5,7-dichloro-6-methylpyrazolo[1,5-a]pyrimidine
(81% yield). LCMS(M+1=203)
Example 268. Synthesis of 5-chloro-7-(cyclopropylamino)-6-methylpyraxolo[1,5-a]pyrimidine-3-carbaldehyde
[0851]

[0852] To the reaction flask, 5,7-dichloro-6-methylpyrazolo[1,5-a]pyrimidine (5 g, 25 mmol)
was added along with cyclopropyl amine (1.8 mL, 25 mmol), triethylamine (3.5 mL, 25
mmol), and acetonitrile (87 mL). The reaction was stirred at room temperature for
3 hours then heated at 85°C for an additional 6 hours. The mixture was cooled to room
temperature, diluted with water, filtered and washed with water. The intermediates,
5-chloro-N-cyclopropyl-6-methylpyrazolo[1,5-a]pyrimidin-7-amine, was further purified
by silica gel chromatography (10% ethyl acetate/hexanes) to provide 4.8 grams of a
white solid (86% yield). LCMS (M+1= 223)
[0853] To the intermediate (3.6 g, 16 mmol) isolated above in DMF (59 mL) was added phosphorous
oxychloride (9 mL, 96 mmol) slowly at room temperature. The reaction mixture was allowed
to stir at room temperature for 10 hours then quenched by addition to 6N NaOH solution.
The pH of the mixture was adjusted with 6N HCl to pH = 7-9. The solid was recovered
by filtration and washed with water. The product, 5-chloro-7-(cyclopropylamino)-6-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde,
was purified by recrystallization from ethyl acetate/hexanes to yield a white solid
in 73% yield (2.9 g). LCMS (M+1=251)
Example 269. Synthesis of tert-butyl 5-chloro-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0854]

[0855] To 5-chloro-7-(cyclopropylamino)-6-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(2.9 g, 11.7 mmol) in methylene chloride (22 mL) was added triethylamine (2 mL, 14
mmol), dimethylaminopyridine (100 mg, 0.8 mmol), and di-t-butyldicarbonate (3.1 g,
14 mmol). The mixture was stirred at room temperature for 10 hours. The reaction mixture
was transferred to a separatory funnel, washed 1X with H
2O, 2X with brine, dried over MgSO
4, filtered, and evaporated to dryness to provide an oily residue. The crude material
was purified by silica gel chromatography (25% ethyl acetate/hexanes) to yield a light
orange solid (3.6 g, 88% yield), tert-butyl 5-chloro-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate.
LCMS (M+1=351)
Example 270. Synthesis of 3-chloro-4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0856]

[0857] To 4-amino-3-chlorobenzonitrile (52 mg, 0.34 mmol), Cs
2CO
3 (130 mg, 0.4 mmol) were added to
tert-butyl 5-chloro-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
(100 mg, 0.29 mmol) dissolved in 1,4-dioxane (1.1 mL). Racemic BINAP (11 mg, 0.017
mmol) and palladium(II) acetate (8 mg, 0.011 mmol) were then added. The mixture was
sealed and irradiated at 110 °C for 60 min in the microwave. Et
2O (3 mL) was added and the solution was filtered. The filtrate was concentrated
in vacuo. The crude residue was dissolved in dichloromethane (1.5 mL) and trifluoroacetic acid
(1.5 mL). After stirring at room temperature for 1 hour, the solution was concentrated
under a stream of air. The crude material was purified by silica gel chromatography
(3% acetone/dichloromethane) to yield the product, 3-chloro-4-(7-(cyclopropylamino)-3-fomryl-6-methylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
(34 mg, 33% yield). LCMS (M+1=367)
Example 271. Synthesis of 3-chloro-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
[0858]

[0859] Hydantoin (2.7 mg, 0.027 mmol) and 3-chloro-4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
(10 mg, 0.027 mmol) were dissolved in ethanol (0.4 mL) along with piperidine (3 uL,
0.03 mmol). The reaction was heated at 80 °C. After 10 hours, the reaction was cooled
to r.t., diluted with water, and the precipitate was collected and washed with water,
1:1 ethanol.:water, then ethanol. The bright yellow solid was dried
in vacuo to give 3-chloro-4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-ylamino)benzonitrile
(7 mg, 58% yield). LCMS (M+1=449)
[0860] The following molecules were prepared using chemistries similar to synthesis in examples
above. All compounds were characterized by LCMS. Table 51B shows the biological activities
of the compounds listed in Table 51A.
Table 51B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inch 2.5 uM |
AB: MDAMB453 IC50 (u M) |
AB: BxPC3 IC50 (u M) |
| B46 |
<0.01 |
47.606 |
24.21 |
> 30 |
| C46 |
<0.01 |
59.266 |
6.288 |
15.231 |
| D46 |
<0.01 |
53.934 |
6.244 |
29.919 |
| E46 |
<0.1 |
49.545 |
16.63 |
20.921 |
Example 272. Synthesis of 5-chloro-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0861]

[0862] To the reaction flask, 5,7-dichloro-2-methylpyrazolo[1,5-a]pyrimidine (2 g, 10 mmol)
was added along with cyclopropyl amine (0.7 mL, 10 mmol), triethylamine (1.4 mL, 10
mmol), and acetonitrile (30 mL). The reaction was stirred at room temperature for
8 hours then cooled to room temperature, diluted with water, filtered and washed with
water. The intermediate, 5-chloro-N-cyclopropyl-2-methylpyrazolo[1,5-a]pyrimidin-7-amine,
was dried under vacuum to provide 1.85 grams of a white solid (83% yield). LCMS (M+1=223)
[0863] To the intermediate (1.9 g, 8.3 mmol) isolated above in DMF (31 mL) was added phosphorous
oxychloride (4.6 mL, 49.7 mmol) slowly at room temperature. The reaction mixture was
allowed to stir at room temperature for 10 hours then quenched by addition to 6N NaOH
solution. The pH of the mixture was adjusted with 6N HCl to pH = 7-9. The solid was
recovered by filtration and washed with water. The product, 5-chloro-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde,
was obtained as a white solid in 80% yield (1.7 g). LCMS (M+1=251)
Example 273. Synthesis of tert-butyl 5-chloro-3-formyl-2-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0864]

[0865] To 5-chloro-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(1.7 g, 6.7 mmol) in methylene chloride (13 mL) was added triethylamine (1.1 mL, 8
mmol), dimethylaminopyridine (100 mg, 0.8 mmol), and di-t-butyldicarbonate (1.8 g,
8 mmol). The mixture was stirred at room temperature for 10 hours. The reaction mixture
was transferred to a separatory funnel, washed 1X with H
2O, 2X with brine, dried over MgSO
4, filtered, and evaporated to dryness to provide an oily residue which solidified
on standing. The product, tert-butyl 5-chloro-3-formyl-2-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate,
was recovered as an off-white solid in 82% yield (1.9g). LCMS (M+1=351)
Example 274. Synthesis of 5-(4-(1H-pyrazol-1-yl)phonylamino)-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0866]

[0867] To 4-(1H-pyrazol-1-yl)aniline (54 mg, 0.34 mmol), Cs
2CO
3 (130 mg, 0.4 mmol) were added to
tert-butyl 5-chloro-3-formyl-2-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
(100 mg, 0.29 mmol) dissolved in 1,4-dioxane (1.1 mL). Racemic BINAP (11 mg, 0.017
mmol) and palladium(II) acetate (8 mg, 0.011 mmol) were then added. The mixture was
sealed and irradiated at 110 °C for 60 min in the microwave. Et
2O (3 mL) was added and the solution was filtered. The filtrate was concentrated
in vacuo. The crude residue was dissolved in dichloromethane (1.5 mL) and trifluoroacetic acid
(1.5 mL). After stirring at room temperature for 1 hour, the solution was concentrated
under a stream of air. The crude material was purified by silica gel chromatography
(15% acetone/dichloromethane) to yield the product, 5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(24 mg, 23% yield). LCMS (M+1=374)
Example 275. Synthesis of 5-((5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0868]

[0869] Hydantoin (3 mg, 0.03 mmol) and 5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidine-3-carbaldebyde
(12 mg, 0.03 mmol)) were dissolved in ethanol (0.4 mL) along with piperidine (3 uL,
0.03 mmol). The reaction was heated at 80 °C in the microwave for 2 hours. The reaction
was then cooled to r.t., diluted with water, and the precipitate was collected and
washed with water, 1:1 ethanol:water, then ethanol. The yellow solid was dried
in vacuo to give 5-((5-(4-(1H-pyrazol-1-yl)phenylamino)-7-(cyclopropylamino)-2-methylpyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(9.5 mg, 65% yield). LCMS (M+1=456)
Table 52. Biological Activies of Example 275:
| CK2: IC50 (µM) |
PIM2: %inh (2.5 µM) |
| >1 |
43.426 |
Example 276. Synthesis of 7-chloro-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
[0870]

[0871] Under nitrogen gas atmosphere, 2-cyano-3,3-bismethylthio-2-propenoic methyl ester
(6 g, 29.5 mmol) was added to ethanol (40 mL) along with 3-aminopyrazole (2.6 g, 31
mmol) and the mixture was refluxed for 2.5 hours. The reaction was then cooled to
room temperature and precipitate was collected by filtration under vacuum. The solid
was washed with ethanol and dried under vacuum to give 7-hydroxy-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
in 67% yield (4.1 g). This material was used for the next step without further purification.
LCMS (M+1=207)
[0872] Under nitrogen gas atmosphere, phosphorous oxychloride (9.4 mL, 101.3 mmol) and dimethylaniline
(2.6 mL, 20.3 mmol) was added successively to the intermediate, 7-hydroxy-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile,
prepared above (4.1 g, 19.7 mmol). The mixture was heated at 110°C for 4 hours then
excess POCl
3 was removed under vacuum. The residue was made basic with 3N NaOH solution (pH =
9-10) and extracted with ethyl acetate (3x). The combined organic layers were dried
over anhydrous Na
2SO
4, filtered, and concentrated under vacuum. The residue was purified by recrystallization
from ethyl acetate hexanes to provide the product, 7-chloro-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
(80% yield). LCMS (M+1=225)
Example 277. Synthesis of 7-(cyclopropylamino)-3-formyl-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
[0873]

[0874] To the reaction flask, 7-chloro-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
(3.1 g, 13.7 mmol) was added along with cyclopropyl amine (0.96 mL, 13.7 mmol), triethylamine
(1.9 mL, 13.7 mmol), and acetonitrile (30 mL). The reaction was stirred at 85°C for
10 hours then the mixture was cooled to room temperature, diluted with water, filtered
and washed with water. The intermediate, 7-(cyclopropylamino)-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile,
was further purified by recrystallization from ethyl acetate hexanes to provide 3
grams in 89% yield. LCMS (M+1=246)
[0875] To the intermediate (3 g, 12.2 mmol) isolated above in DMF (45 mL) was added phosphorous
oxychloride (13.7 mL, 146 mmol) slowly at room temperature. The reaction mixture was
allowed to stir at 70°C for 10 hours, cooled to room temperature, and quenched by
addition to 6N NaOH solution. The pH of the mixture was adjusted with 6N HCl to pH
= 7-9. The solid was recovered by filtration and washed with water. The product, 7-(cyclopropylamino)-3-formyl-5-(methylthio)pyrazolo(1,5-a]pyrimidine-6-carbonitrile,
was obtained as a solid in 38% yield (1.28 g). LCMS (M+1=274)
Example 278. Synthesis of 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfinyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
and 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfonyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
[0876]

[0877] Hydantoin (366 mg, 3.7 mmol) and 7-(cyclopropylamino)-3-formyl-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
(1 g, 3.7 mmol) were dissolved in ethanol (18.5 mL) along with piperidine (3.7 mL,
3.7 mmol). The reaction was heated at 80 °C. After 10 hours, the reaction was cooled
to r.t., diluted with water, and the precipitate was collected and washed with water,
1:1 ethanol:water, then ethanol. The yellow solid was dried
in vacuo to give the intermediate, 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylthio)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
(1.1 g, 83% yield). LCMS (M+1=356)
[0878] The intermediate (1.1 g, 3.04 mmol) was mixed with m-chloroperbenzoic acid (1.9 g,
7.6 mmol) in dichloromethane (12 mL). The mixture was allowed to stir at room temperature
for 12 hours. The solid was collected by filtration, washed dichloromethane then dried
under vacuum overnight. The products, 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfonyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
and 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfunyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile,
were recovered as a yellow solid in quantitative yield. LCMS (M+1 = 372) and LCMS
(M+1 = 388)
Example 279. Synthesis of 5-(1-(3-chlorophenyl)ethylamino)-7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
[0879]

[0880] The mixture of 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfonyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
and 7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-5-(methylsulfinyl)pyrazolo[1,5-a]pyrimidine-6-carbonitrile
(20 mg) was mixed with (R)-1-(3-chlorophenyl)ethanamine (33 mg) in
i-propanol (0.5 mL). The reaction mixture was heated at 90°C in the microwave for 1
hour. The reaction was cooled to room temperature and concentrated under vacuum. The
residue was diluted with water, filtered and washed with water followed by 20% ethanol/water
mixture. The solid was dried under high vacuum to give 2 mg of the product, 5-(1-(3-chlorophenyl)ethylamino)-7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyridine-6-carbonitrile.
LCMS (M+1=463)
[0881] The following molecules were prepared using chemistries similar to syntheses in examples
above. All compounds were characterized by LCMS. Table 53B shows the biological activities
of the compounds listed in Table 53A.
Table 53B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 IC50 (uM) |
AB: BxPC3 IC50 (uM) |
| F46 |
<0.1 |
39.402 |
|
|
| G46 |
<0.1 |
71.368 |
9.41 |
16.174 |
| H46 |
<0.1 |
41.888 |
> 30 |
> 30 |
| I46 |
<0.1 |
84.757 |
25.494 |
2.698 |
| J46 |
<0.1 |
57.881 |
7.76 |
6.299 |
| K46 |
<0.1 |
69.233 |
6.41 |
2.989 |
Example 280. Synthesis of 2-(4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
[0882]

[0883] In a reaction flask, 2-(piperazin-1-yl)nicotinonitrile (22 mg, 0.11 mmol) was mixed
with 5-chloro-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde (27 mg,
0.11 mmol) in DMF (0.5 mL) along with potassium carbonate (32 mg, 0.23 mmol). The
reaction was heated at 95°C for 12 hours then partitioned between water and ethyl
acetate. The organic layer was washed with water then saturated NaCl solution. The
ethyl acetate layer was isolated, dried of anhydrous sodium sulfate, filtered, and
evaporated to dryness. The product, 2-(4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile,
was recovered in 35% yield (16 mg) after recrystallization from ethyl acetate/hexanes.
LCMS (M+1=389)
Example 281. Synthesis of 2-(4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
[0884]

[0885] Hydantoin (4 mg, 0.04 mmol) and 2-(4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(16 mg, 0.04 mmol) were dissolved in ethanol (0.5 mL) along with piperidine (4 uL,
0.04 mmol). The reaction was heated at 80 °C for 12 hours. The reaction was then cooled
to r.t., diluted with water, and the precipitate was collected and washed with water,
1:1 ethanol:water, then ethanol. The yellow solid was further purified by recrystallization
from ethyl acetate/hexanes and dried
in vacuo to give 2-(4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(2 mg, 21% yield). LCMS (M+1=471)
[0886] The following molecules were prepared using chemistries similar to synthesis in examples
above. All compounds were characterized by LCMS. Table 54B shows the biological activities
of the compounds listed in Table 54A.
Table 54B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5 uM |
AB: MDAMB453 IC50 (u M) |
AB: BxPC3 IC50 (u M) |
| L46 |
<0.01 |
47.249 |
1.082 |
3.701 |
| M46 |
<0.1 |
60.945 |
|
|
| N46 |
<0.1 |
32.984 |
19.188 |
7.441 |
| O46 |
<0.1 |
12.231 |
|
|
| P46 |
<0.1 |
-39.422 |
|
|
Example 282. Synthesis of 2-(4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
[0887]

[0888] Tert-butyl 5-chloro-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
(60 mg, 0.17 mmol) was mixed with 2-(piperazin-1-yl)nicotinonitrile (64 mg, 0.34 mmol)
in
i-propanol (1 mL)). The reaction mixture was heated at 90°C in the microwave for 1
hour. The reaction was cooled to room temperature and concentrated under vacuum. The
residue was dissolved in (1:1) TFA/DCM (4 mL) and stirred at room temperature for
1 hour. The reaction was evaporated to dryness, quenched with 3N NaOH, filtered, washed
with water, and dried under vacuum The product, 2-(4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile,
was further purified by preparative TLC using 5% acetone/dichloromethane as the eluent
(40 mg, 58% yield). LCMS (M+1=403)
Example 283. Synthesis of 2-(4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
[0889]

[0890] Hydantoin (7.5 mg, 0.08 mmol) and 2-(4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(15 mg, 0.04 mmol) were dissolved in ethanol (0.5 mL) along with piperidine (8 uL,
0.08 mmol). The reaction was heated at 80 °C for 1 hour in the microwave. The reaction
was then cooled to r.t., diluted with waster, and the precipitate was collected and
washed with water, 1:1 ethanol:water, then ethanol. The yellow solid was dried
in vacuo to give 2-(4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(3m.g, 17% yield). LCMS (M+1=485)
Example 284. Synthesis of 2-(4-(7-(cyclopropylamino)-3-((2,4-dioxothiazolidin-5-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
[0891]

[0892] In a reaction flask, thiazolidine-2,4-dione (9 mg, 0.08 mmol) and 2-(4-(7-(cyclopropylamino)-3-formyl-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(15 mag, 0.04 mmol) were dissolved in ethanol (0.5 mL) along with piperidine (8 uL,
0.08 mmol). The reaction was heated at 80 °C for 1 hour in the microwave. The reaction
was then cooled to r.t., diluted with water, and the precipitate was collected and
washed with water, 1:1 ethanol:water, then ethanol. The yellow solid was dried
in vacuo to give 2-(4-(7-(cyclopropylamino)-3-((2,4-dioxothiazolidin-5-ylidene)methyl)-6-methylpyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)nicotinonitrile
(10 mg, 54% yield). LCMS (M+1=502)
[0893] The following molecules were prepared using chemistries similar to synthesis in examples
above. All compounds were characterized by LCMS. Table 55B shows the biological activities
of the compounds listed in Table 55A.
Table 55B.
| Compound |
CK2: IC50 (uM) |
PIM2: %inh 2.5uM |
AB: MDAMB453 IC50(uM) |
AB: BxPC3 IC50(uM) |
| Q46 |
<0.01 |
13.151 |
>30 |
>30 |
| R46 |
<1 |
68.545 |
|
|
| S46 |
<1 |
-19.761 |
|
|
| T46 |
<1 |
50.998 |
|
|
Example 285. Synthesis of tert-butyt 5-chloropyrazolo[1,5-a]pyrimidin-7-yl(2-morpholinopropyl)carbamate
[0894]

[0895] To the reaction flask, 5,7-dichloropyrazolo[1,5-a]pyrimidine (3.2 g, 17 mmol) was
added along with 2-morpholinopropan-1-amine (2.4g, 17 mmol), triethylamine (2.3mL,
17 mmol), and acetonitrile (56 mL). The reaction was stirred at 85°C for 12 hours
then cooled to room temperature, diluted with water, filtered and washed with water.
The intermediate, 5-chloro-N-(2-morpholinopropyl)pyrazolo[1,5-a]pyrimidin-7-amine,
was dried under vacuum to provide 3.8 grams of an off-white solid (77% yield). LCMS
(M+1= 296)
[0896] To 5-chloro-N-(2-morpholinopropyl)pyrazolo[1,5-a]pyrimidin-7-amine (3.8g, 13 mmol)
in methylene chloride (50 mL) was added triethylamine (2.1 mL, 15 mmol), dimethylaminopyridine
(200 mg, 1.6 mmol), and di-t-butyldicarbonate (3.3 g, 15 mmol). The mixture was stirred
at room temperature for 10 hours. The reaction mixture was transferred to a separatory
funnel, washed 1X with H
2O, 2X with brine, dried over MgSO
4, filtered, and evaporated to dryness to provide an oily residue which solidified
on standing. The product, tert-butyl 5-chloropyrazolo[1,5-a]pyrimidin-7-yl(2-morpholinopropyl)carbamate,
was recovered as an off-white solid in 39% yield (5.1 mmol). LCMS (M+1 = 396)
Example 286. Synthesis of N5-(5-chloro-2-fluorophenyl)-N7-(2-morpholinopropyl)pyrazolo[1,5-a]pyrimidine-5,7-diamine
[0897]

[0898] To tert-butyl 5-chloropyrazolo[1,5-a)pyrimidin-7-yl(2-morpholinopropyl)carbamate
(396 mg, 1 mmol), 5-chloro-2-fluoroaniline (145 uL, 1.2 mmol), and LiHMDS (2.2 mL,
2.2 mmol, 1M in THF) was added X-Phos (11 mg, 0.024 mmol) and tris(dibenzylideneacetone)dipalladium(0)
(18 mg, 0.02 mmol). The mixture was sealed and irradiated at 65 °C for 60 min in the
microwave. The reaction was quenched with 1N HCL (2 mL) and then neutralized with
saturated sodium bicarbonate solution. The mixture was extracted with ethyl acetate
and washed with saturated sodium chloride solution. The organic layer was collected,
dried over anhydrous sodium sulfate, filtered, and evaporated to dryness. The crude
residue was dissolved in dichloromethane (2 mL) and trifluoroacetic acid (2 mL). After
stirring at room temperature for 1 hour, the solution was concentrated under a stream
of nitrogen. The crude material was neutralized with saturated sodium bicarbonate
solution then purified by silica gel chromatography (75% ethyl acetace/hexanes) to
yield the product, N5-(5-chloro-2-fluorophenyl)-N7-(2-morpholinopropyl)pyrazolo[1,5-a]pyrimidine-5,7-diamine
(84 mag, 21% yield). LCMS (M+1=405)
Example 287. Synthesis of 5-(5-chloro-2-fluorophenylamino)-7-(2-morpholinopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0899]

[0900] In a reaction flask, N5-(5-chloro-2-fluorophenyl)-N7-(2-morpholinopropyl)pyrazolo[1,5-a]pyrimidine-5,7-diamine
(84 mg, 0.21mmol)) was dissolved in DMF (0.9 mL) then phosphorous oxychloride (58
uL, 0.62 mmol) was added slowly at room temperature. The reaction mixture was allowed
to stir at room temperature for 2 days then quenched by addition to 6N NaOH solution.
The pH of the mixture was adjusted with 6N HCl to pH = 7-9. The solid was recovered
by filtration and washed with water. The product, 5-(5-chloro-2-fluorophenylamino)-7-(2-morpholinopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde,
was purified by preparative TLC (5% acetone/dichloromethane) to yield 37 mg of the
desired product (41% yield). LCMS (M+1=433)
Example 288. Synthesis of 5-((5-(5-chloro-2-fluorphenylamino)-7-(2-morpholinopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0901]

[0902] Hydantoin (7 mg, 0.07 mmol) and 5-(5-chloro-2-fluorophenylamino)-7-(2-morpholinopropylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
(15 mg, 0.035 mmol) were dissolved in ethanol (0.5 mL) along with piperdine (7 uL,
0.07 mmol). The reaction was heated at 80 °C for 1 hour in the microwave. The reaction
was then cooled to r.t., diluted with water, and the precipitate was collected and
washed with water, 1:1 ethanol:water, then ethanol. The yellow solid was dried
in vacuo to give 5-((5-(5-chloro-2-fluorophenylamino)-7-(2-morpholinopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
(5 mg, 28% yield). LCMS (M+1=515)
[0903] The following molecules were prepared using chemistries similar to synthesis in examples
above. All compounds were characterized by LCMS. Table 56B shows the biological activities
of the compounds listed in Table 56A.
Table 56B.
| LCMS m/z [M+1]+ |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| 515 |
<0.01 |
|
|
|
| 522 |
<0.01 |
|
1.522 |
10.361 |
Example 289. Synthesis of tert-butyl 4-(7-(cyclopropylamino)-3-formylpyrazolo[1,5-a]pyrimidin-5-yl)piperazine-1-carboxylate
[0904]

[0905] To 5-chloro-7-(cyclopropylamino) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde (500
mg, 2.11 mmol) in dimethylformamide was added 1-Boc-piperazine (1.17g, 6.33 mmol),
potassium carbonate (583mg, 4.21mmol) and di isopropyl ethylamine (0.41mL, 2.5 mmol).
The mixture was heated to 80°C for overnight. Cooled the reaction mixture, added water
and filtered the white precipitate to yield tert-butyl 4-(7-(cyclopropylamino)-3-formylpyrazolo
[1, 5-a] pyrimidin-5-yl) piperazine-1-carboxylate (655 mg, 80% yield). LCMS (M+1=387)
Example 290. Synthesis of (Z)-5-((7-(cyclopropylamino)-5-(piperazin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0906]

[0907] The above product tert-butyl 4-(7-(cyclopropylamino)-3-formylpyrazolo [1,5-a] pyrimidin-5-yl)
piperazine-1-carboxylate (250 mg, 0.645 mmol) was dissolved in 2.0 mL ethanol, added
hydantoin (129 mag, 1.288 mmol) and piperidine (127 ul). The reaction was heated to
80°C for three hours. Cooled the reaction mixture and yellow precipitate was filtered,
washed with ethanol, dried to yield (Z)-tert-bulyl 4-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)piperazine-1-carboxylate
(264 mg, 87% yield). The above product was further dissolved in 1:1 mixture of DCM:
TFA and stirred at room temperature for 30 minutes. Mixture was concentrated and dried
to yield yellow solid of (Z)-5-((7-(cyclopropylamino)-5-(piperazin-1-yl) pyrazolo
[1,5-a] pyrimidin-3-yl) methylene) imidazolidine-2, 4-dione. LCMS (M+1=369)
Example 291. Synthesis of (Z)-5-((5-(4-(2-cyclopropylacetyl)piperazin-1-yl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidine-2,4-dione
[0908]

[0909] To (Z)-5-((7-(cyclopropylamino)-5-(piperazin-1-yl) pyrazolo [1, 5-a] pyrimidin-3-yl)
methylene) imidazolidine-2, 4-dione
(step b) (10 mg, 0.027 mmol) in 50.0 uL NMP, was added HOBT (4.4 mg,0.032 mmol), cyclopropyl
acetic acid (60 ul in 0.02M NMP solution), DIPEA (9.5 ul, 0.067 mmol) and EDC (7.8
mg, 0.040 mmol). The reaction mixture was stirred at room temperature for one hour.
Diluted the reaction mixture with methanol and prepared by HPLC to yield (Z)-5-((5-(4-(2-cyclopropylacetyl)piperazin-1-yl)-7-(cyclopropylamino)pyrazolo[1,5-a]pyrimidin-3-yl)methylene)imidazolidirie-2,4-dione.
LCMS (M+1=451)
[0910] The compounds listed in the following Table 57A were prepared according to the procedures
as described above. Table 57B shows the biological activities of the compounds listed
in Table 57A.
Table 57B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| U46 |
<0.1 |
42.842 |
5.375 |
10.85 |
| V46 |
<0.01 |
38.513 |
8.682 |
>30 |
| W46 |
<0.01 |
70.354 |
20.4 |
5.92 |
| X46 |
<0.01 |
41.17 |
0.899 |
11.126 |
| Y46 |
<0.01 |
52.82 |
0.773 |
16.427 |
| Z46 |
<0.01 |
51.843 |
1.187 |
8.643 |
| A47 |
<0.01 |
60.724 |
5.638 |
>30 |
| B47 |
<0.01 |
41.017 |
2.584 |
6.843 |
| C47 |
<0.01 |
3.668 |
8.715 |
>30 |
Example 292. Synthesis of tert-butyl 5-azido-3-formylpyrazolo[1,5-a]pyrimidin-7-yl(cyclopropyl)carbamate
[0911]

[0912] To 5-chloro-7-(cyclopropylamino) pyrazolo [1,5-a] pyrimidine-3-carbaldehyde (4.0g,
16.87 mmol) in dimethylformamide was added sodium azide (1.56 g, 23.9 mmol) and the
reaction mixture was heated at 80°C for 8 hrs. Cooled the reaction mixture, added
water and white precipitate filtered and dried to yield 5-azido-7-(cyclopropylamino)
pyrazolo [1,5-a] pyrimidine-3-carbaldehyde (2.95 g, 75% yield). LCMS (M+1=244)
Example 293. Synthesis of 5-amino-7-(cycloproprylamino)pyrazolo[1,5-a]pyrimidine-3-carbaldehyde
[0913]

[0914] The above product 5-azido-7-(cyclopropylamino) pyrazolo [1,5-a] pyrimidine-3-carbaldehyde
(1.09 g, 4.4b mmol) was subjected to hydrogenation using 10% wt palladium on carbon
in ethanol. The reaction was stirred under hydrogen for 6 hours. The mixture was filtered
through celite and sonicated with 1:1 mixture of ethyl acetate and hexane. The light.
yellow solid was filtered and dried to yield 5-amino-7-(cyclopropylamino) pyrazolo
[1, 5-a] pyrimidine-3-carbaldehyde as product 750 mg (85% yield). LCMS (M+1=218)
Example 294. Synthesis of (Z)-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)-2-fluorobenzamide
[0915]

[0916] To 5-amino-7-(cyclopropylamino) pyrazolo [1, 5-a] pyrimidine-3-carbaldehyde (
step b) (30 mg, 0.138 mmol) in 1.0 mL tetrahydrofuran, stirring under nitrogen, was added
2-fluoro benzoyl chloride (33 ul, 0.275mmol) and DIPEA (28.8 ul). The reaction mixture
was stirred at room temperature for one hour. The reaction was then partitioned between
ethyl acetate and water, the organic layer was dried under sodium sulfate concentrated
on high vaccum to yield N-(7-(cyclopropylamino)-3-formylpyrazolo [1,5-a] pyrimidin-5-yl)-2-fluorobenzamide.
The crude product was further dissolved in 1.0 mL ethanol, added hydantoin (41.2 mag,
0.411 mmol) and pipperdine (40.0 ul). The reaction was heated to 80°C for three hours.
Cooled the reaction mixture and yellow precipitate was filtered, washed with ethanol
to yield 10 mg (40% yield, two steps) (Z)-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)
methyl) pyrazolo [1, 5-a] pyrimidin-5-yl)-2-fluorobenzamide. LCMS (M+1=422)
Example 295. Synthesis of (Z)-4-cyano-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)benzamide
[0917]

[0918] To 5-amino-7-(cyclopropylamino)pyrazolo [1,5-a] pyrimidine-3-carbaldehyde (
step b) (30 mag, 0.138 mmol) in 1.0 mL acetonitrile was added HATU (104 mg, 0.273 mmol),
3-cyano benzoic acid (30 mg, 0.203 mmol) and DIPEA (48.0 ul). The reaction mixture
was heated to 80°C for five hours. Cooled the reaction mixture and light yellow precipitate
was filtered, washed with acetonitrile to yield 4-cyano-N-(7-(cyclopropylamino)-3-formylpyrazolo
[1,5-a] pyrimidin-5-yl) benzamide. The crude product was further dissolved in 1.0
mL ethanol, added hydantoin (10mg, 0.01 mmol) and pipperdine (9.5 ul The reaction
was heated to 80°C for three hours. Cooled the reaction mixture and precipitate was
filtered, washed with ethanol to yield 7 mg (40% yield, two steps) (Z)-4-cyano-N-(7-(cyclopropylamino)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)pyrazolo[1,5-a]pyrimidin-5-yl)benzamide.
LCMS (M+1=429)
[0920] The following compounds were prepared using chemistries described in the present
disclosure. Table 59B shows the biological activities of the compounds listed in Table
59A.
Table 59B.
| Compound |
CK2: IC50 (µM) |
PIM2: IC50 (µM) |
AB: MDAMB453 (µM) |
AB: BxPC3 (µM) |
| Q48 |
<0.1 |
|
|
|
| R48 |
<0.01 |
|
|
|
| S48 |
<0.01 |
|
|
|
| T48 |
<0.1 |
|
|
|
| U48 |
<0.01 |
|
|
|
| V48 |
<0.01 |
|
|
|
| W48 |
<0.1 |
|
|
|
| X48 |
<0.1 |
|
|
|
| Y48 |
<0.1 |
2.026 |
11.928 |
12.73 |
| Z48 |
<0.1 |
|
|
|
| A49 |
<0.01 |
87.627 |
0.709 |
6.265 |
| B49 |
<0.01 |
26.245 |
|
>30 |
| C49 |
<0.01 |
|
0.529 |
1.688 |
| D49 |
<0.01 |
|
0.988 |
1.191 |
| E49 |
<0.01 |
|
2.855 |
6.613 |
| F49 |
<0.01 |
49.17 |
2.401 |
14.078 |
| G49 |
<0.01 |
-32.822 |
13.256 |
29.23 |
| H49 |
<0.01 |
|
|
|
| I49 |
<0.01 |
|
|
|
| J49 |
<0.01 |
|
|
|
| K49 |
<0.01 |
|
|
|
| L49 |
<0.01 |
|
|
|
| M49 |
<0.01 |
|
|
|
| N49 |
<0.01 |
|
|
|
| O49 |
<0.1 |
|
|
|
[0921] The following compounds in Table 60 can be prepared using chemistries described in
the present disclosure:

[0922] Compound
3 were prepared by reaction compound
1 with boronic acid
2 using Suzuki coupling reaction conditions as shown below (Scheme 2).

[0924] Compound
5 (as shown in Scheme 3 below) were prepared from compound
4 using chemistries described in patent application
US2004/0019058. Compound
5 can be converted to molecule
6 using intermediates and chemistries described above. Deprotection of
6 using reagents such as N,N-dimethylbarbituric acid and a palladium catalyst can lead
to
7.

[0925] Compound 7 (as shown in Scheme 4 below) can be converted to molecules
8, 9,10,
11 and
12 using chemistries known to a person skilled in the art.

[0926] The following compounds in Table 62 can be prepared using chemistries described in
the present disclosure:

[0927] Compound
3 were prepared by reaction compound
1 with boronic acid
2 using Suzuki coupling reaction conditions (as shown in Scheme 5 below).

[0928] The following compounds in Table 63 can be prepared using chemistry described on
Scheme 5:

[0929] Compound
2 were prepared by reaction compound
1 using reductive amination conditions (as shown in Scheme 6 below.

[0930] The following compounds in Table 64 can be prepared using chemistry described on
Scheme 6:

Biological Test Methods:
Biological Example A
CK2 Assay Method
[0931] Modulatory activity of compounds described herein was assessed
in vitro in cell-free CK2 assays by the following method.
[0932] In a final reaction volume of 50 µl, CK2 ααββ (4 ng, 8.5 mU) was incubated with various
concentrations of test compounds in DMSO (1 ul, 2% by volume), 20 mM MOPS pH 7.2,
10 mM EGTA, 0.15 M NaCl, 10 mM DTT, 0.002% Brij-35, 200 µM RRRDDDSDDD, 10 mM MgAcetate,
ATP 15 uM and 0.33% (by volume) ([γ-33P]ATP: Stock 1mCi/100µl; 3000Ci/mmol (Perkin
Elmer)). Reactions were maintained for 40 min at 23 °C. The reactions were quenched
with 100 ul of 0.75% Phosphoric acid, then transferred to and filtered through a Phosphocellulose
filter plate (Millipore, MSPH-N6B-50). After washing each well 4 times with 0.75%
Phosphoric acid, scintillation fluid (20 uL) was added to each well and the residual
radioactivity was measured using a Wallac luminescence counter.
Biological Example B
PIM-1 Assay Method
[0933] The following procedure was used to assay the PIM-1 kinase activity of compounds
of the invention. Other methods for assaying PIM-1 and other PIM kinases, as well
as methods to assay for activity against the various kinases for the kinase panel
mentioned in Figures 1 and 2, are known in the art.
[0934] In a final reaction volume of 50 ul, recombinant PIM-1 (1 ng) was incubated with
12 mM MOPS pH 7.0, 0.4 mM EDTA, glycerol 1%, brij 35 0.002 %, 2-mercaptoethanol 0.02
%, BSA 0.2 mg/ml, 100 uM KKRNRTLTK, 10 mM MgAcetate, 15 uM ATP, [γ-
33P-ATP] (specific activity approx. 500 cpm/pmol), DMSO 4% and test inhibitor compound
at the required concentration. The reaction was initiated by the addition of the Magnesium
ATP mixture. After 40 min incubation at 23°C, the reactions were quenched by the addition
of 100 ul 0.75% Phosphoric acid, and the labeled peptide collected by filtration through
a phosphocellulose filter plate. The plate was washed 4 times with 0.075% phosphoric
acid (100 ul per well) and then, after the addition of scintillation fluid (20 ul
per well), the counts were measured by a scintillation counter.
Biological Example C
PIM-2 Assay Method
[0935] Test compounds dissolved and diluted in DMSO (2 µl) were added to a reaction mixture
comprising 10 µl of 5X Reaction Buffer (40mM MOPS pH 7.0, 5mM EDTA), 10 µl of recombinant
human PIM2 solution (4 ng PIM-2 dissolved in dilution buffer (20 mM MOPS pH 7.0; EDTA
1 mM; 5% Glycerol; 0.01% Brij 35; 0.1%; 0.1% 2-mercaptoethanol; 1 mg/ml BSA)) and
8 ul of water. Reactions were initiated by the addition of 10 ul of ATP Solution (49%
(15 mM MgCl
2; 75 uM ATP) 1% ([γ
-33P]ATP: Stock 1mCi/100µl; 3000Ci/mmol (Perkin Elmer)) and 10 ul of substrate peptide
solution (RSRSSYPAGT, dissolved in water at a concentration of 1 mM), Reactions were
maintained for 10 min at 30°C. The reactions were quenched with 100 ul of 0.75% Phosphoric
acid, then transferred to and filtrered through a Phosphocellulose filter plate (Millipore,
MSPH-N6B-50). After washing each well 4 times with 0.75% Phosphoric acid, scintillation
fluid (20 uL) was added to each well and the residual radioactivity was measured using
a Wallah luminescence counter.
Biological Example D
Cell Proliferation Modulatory Activity
[0936] A representative cell-proliferation assay protocol using Alamar Blue dye (stored
at 4°C, use 20 ul per well) is described hereafter.
96-well plate setup and compound treatment
[0937]
a. Split and trypsinize cells.
b. Count cells using hemocytometer.
c. Plate 4,000-5,000 cells per well in 100 µl of medium and seed into a 96-well plate
according to the following plate layout. Add cell culture medium only to wells B10
to B12. Wells B1 to B9 have cells but no compound added.
| |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
|
| A |
EMPTY |
|
| B |
NO COMPOUND ADDED |
Medium Only |
|
| C |
10nM |
100nM |
1uM |
10uM |
Control |
| D |
10nM |
100nM |
1uM |
10uM |
Comp1 |
| E |
10nM |
100nM |
1uM |
10uM |
Comp2 |
| F |
10nM |
100nM |
1uM |
10uM |
Comp3 |
| G |
10nM |
100nM |
1uM |
10uM |
Comp4 |
| H |
EMPTY |
|
d. Add 100 µl of 2X drug dilution to each well in a concentration shown in the plate
layout above. At the same time, add 100 µl of media into the control wells (wells
B10 to B12). Total volume is 200 µl/well.
e. Incubate four (4) days at 37°C, 5% CO
2 in a humidified incubator.
f. Add 20µl Alamar Blue reagent to each well.
g. Incubate for four (4) hours at 37°C, 5% CO
2 in a humidified incubator.
h. Record fluorescence at an excitation wavelength of 544nm and emission wavelength
of 590nm using a microplate reader.
[0938] In the assays, cells are cultured with a test compound for approximately four days,
the dye is then added to the cells and fluorescence of non-reduced dye is detected
after approximately four hours. Different types of cells can be utilized in the assays
(
e.g., HCT-116 human colorectal carcinoma cells, PC-3 human prostatic cancer cells, MDA-MB231
human breast cancer cells, K-562 human chronic myelogenous leukemia (CML) cells, MiaPaca
human pancreatic carcinoma cells, MV-4 human acute myeloid leukemia cells, and BxPC3
human pancreatic adenocarcinoma cells).
[0939] Activity of compounds of the present invention tested in these
in vitro and cellular assays are summarized in Tables 1A and 2A below. The compounds listed
in Tables 1A and 2A are the Examples and species as described above.
Table A1. Bioactivity Data for Some Compounds of Formula II and Formula II'.
| Compound |
AB: MV-4-11 |
AB: MDAMB453 |
AB: K-562 |
AB: BxPC3 |
AB: SUM-149PT |
CK2: IC50 (uM) |
PIM1: IC50 (uM) |
PIM2: IC50 (uM) |
| P49 |
0.185 |
1.958 |
0.437 |
4.945 |
4.495 |
< 0.01 |
0.6565 |
> 2.5000 |
| Q49 |
|
|
|
|
|
0.1647 |
2.0638 |
1.6438 |
| R49 |
3.608 |
7.7 |
5.129 |
9.45 |
4.6 |
<0.01 |
2.0575 |
1.8456 |
| S49 |
|
|
|
|
|
0.1367 |
0.9177 |
1.3934 |
| T49 |
|
|
|
|
|
0.1739 |
> 2.5000 |
1.4327 |
| U49 |
|
|
|
|
|
<0.01 |
1.4455 |
1.4379 |
| V49 |
|
|
|
|
|
0.2072 |
> 2.5000 |
> 2.5000 |
| W49 |
|
|
|
|
|
0.0513 |
1.2533 |
> 2.5000 |
| X49 |
|
|
|
|
|
0.7502 |
> 2.5000 |
> 2.5000 |
| Y49 |
1.759 |
1.069 |
1.723 |
7.592 |
1.693 |
<0.01 |
0.4414 |
0.5759 |
| Z49 |
> 10 |
14.3 |
> 10 |
26.465 |
>30 |
<0.01 |
> 2.5000 |
> 2.5000 |
| A50 |
|
|
|
|
|
0.764 |
0.5235 |
1.0907 |
Table A2. Bioactivity Data for Some Compounds of Formula II and Formula II'
| Compound |
AB: MDAMB453 |
AB: BxPC3 |
AB: SUM-149PT |
CK2: IC50 (Brij 15um ATP) |
PIM2: IC50 (5um ATP) |
| B50 |
1.047 |
2.341 |
1.043 |
0.00072 |
|
| C50 |
1.552 |
1.564 |
1.922 |
0.00216 |
> 2.5000 |
| D50 |
< 0.12 |
< 0.12 |
0.154 |
0.00038 |
|
| E50 |
0.842 |
3.96 |
1.595 |
0.00081 |
> 2.5000 |
| F50 |
3.459 |
2.958 |
2.054 |
0.00663 |
|
| G50 |
1.483 |
1.626 |
2.073 |
0.00359 |
1.3652 |
| H50 |
3.507 |
3.876 |
4.996 |
0.00412 |
1.2984 |
Modifications may be made to the foregoing without departing from the basic aspects
of the invention. Although the invention has been described in substantial detail
with reference to one or more specific embodiments, those of ordinary skill in the
art will recognize that changes may be made to the embodiments specifically disclosed
in this application.
SEQUENCE LISTING
[0940]
<110> HADDACH, Mustapha TRAN, Joe A. PIERRE, Fabrice REGAN, Collin F. RAFFAELE, Nicholas
B. RAVULA, Suchitra RYCKMAN, David M.
<120> PYRAZOLOPYRIMIDINES AND RELATED HETEROCYCLES AS CK2 INHIBITORS
<130> CYLE-060/02WO
<140> PCT/US2010/056712
<141> 2010-11-15
<150> US 61/266,801
<151> 2009-12-04
<150> US 61/354,165
<151> 2010-06-11
<160> 6
<170> PatentIn version 3.5
<210> 1
<211> 391
<212> PRT
<213> Homo sapiens
<400> 1



<210> 2
<211> 391
<212> PRT
<213> Homo sapiens
<400> 2


<210> 3
<211> 255
<212> PRT
<213> Homo sapiens
<400> 3


<210> 4
<211> 10
<212> PRT
<213> Unknown
<220>
<223> CK2 Assay substrate peptide
<400> 4

<210> 5
<211> 9
<212> PRT
<213> Unknown
<220>
<223> Pim-1 Assay substrate peptide
<400> 5

<210> 6
<211> 10
<212> PRT
<213> Unknown
<220>
<223> PIM-2 Assay substrate peptide
<400> 6
