1. FIELD OF THE INTENTION
[0002] The invention relates to Purine Derivatives; compositions comprising an effective
amount of a Purine Derivative; and uses thereof for the preparation of medicaments
for reducing an animal's rate of metabolism, protecting an animal's heart against
myocardial damage during cardioplegia; or for treating or preventing a cardiovascular
disease, a neurological disorder, an ischemic condition, a reperfusion injury, obesity,
a wasting disease, or diabetes, comprising administering an effective amount of a
Purine Derivative to an animal in need thereof.
2. BACKGROUND OF THE INVENTION
[0003] Adenosine is a naturally occurring purine nucleoside that is ubiquitous in mammalian
cell types. Adenosine exerts its biological effects by interacting with A
1, A
2 (further subclassified as A
2A and A
2B) and A
3 cell surface receptors, which modulate important physiological processes.
[0004] The A
1 and A
2A receptor subtypes are believed to play complementary roles in adenosine's regulation
of a cell's energy supply. Adenosine, which is a metabolic product of ATP, diffuses
from the cell and locally activates the A
1 receptor to decrease the oxygen demand or activates the A
2A receptor to increase the oxygen supply, thereby reinstating the balance of energy
supply and demand within the tissue. The combined action of A
1 and A
2 subtypes increases the amount of available oxygen to tissue and protects cells against
damage caused by a short-term imbalance of oxygen. One of the important functions
of endogenous adenosine is to prevent tissue damage during traumas such as hypoxia,
an ischemic condition, hypotension and seizure activity.
[0005] In addition, modulation of A
1 receptors slows conduction velocity in the heart's atrioventricular node, resulting
in the normalization of supraventricular tachycardias and control of ventricular rate
during atrial fibrillation and flutter. Modulation of A
2A receptors also regulates coronary vasodilation.
[0006] Adenosine is also a neuromodulator, which modulates molecular mechanisms underlying
many aspects of physiological brain function by mediating central inhibitory effects.
An increase in neurotransmitter release follows traumas such as hypoxia, ischemia
and seizures. Neurotransmitters are ultimately responsible for neural degeneration
and neural death, which can cause brain damage or death. Adenosine is thought to be
an endogenous anticonvulsant agent that inhibits glutamate release from excitory neurons
and neuronal firing. Adenosine agonists, therefore, are useful as antiepileptic agents.
[0007] Adenosine plays an important role as a cardioprotective agent. Levels of endogenous
adenosine increase in response to ischemia and hypoxia and protect cardiac tissue
during and after trauma (preconditioning). Adenosine agonists thus are useful as cardioprotective
agents.
[0008] The preparation and use of a number of adenosine A
1 receptor agonists have been described (
Moos et al., J. Med. Chem. 28:1383-1384 (1985);
Thompson et al., J. Med. Chem. 34:3388-3390 (1991);
Vittori et al., J. Med. Chem. 43:250-260 (2000);
Roelen et al., J Med. Chem, 39:1463-1471 (1996); van der
Wenden et al., J Med. Chem. 41102-108 (1998);
Dalpiaz et al., Pharm. Res. 18:531-536 (2001),
Beakers et al., J. Med. Chem. 46,1492-1503 (2003);
U.S. Patent 5,589,467 to Lau et al.; U.S. Patent 5,789,416, to Lum et al.; and
C.E. Muller, Current Medicinal Chemistry 2000, 7, 1269-1288).
[0010] The citation of any reference in Section 2 of this application is not an admission
that the reference is prior art to this application.
[0011] The document
US 2003092668 discloses the use of an adenosine Al receptor agonist such as CCPA for the preparation
of a medicament for the treatment of cardiovascular diseases
3. SUMMARY OF THE INVENTION
[0012] In one embodiment, the invention provides compounds having the Formula (Ia):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2OSO2NH2;
B and C are -OH;
D is:

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -C8-C12 bicyclic cycloalkyl, or -C8-C12 bicyclic cycloalkenyl;
R2 is -halo, -CN, -NHR8, -OR8, -SR8, -NHC(O)OR8, -NHC(O)R4, - NHC(O)NHR8, -NHNHC(O)R4, -NHNHC(O)OR8, -NHNHC(O)NHR8, or -NH-N=C(R6)R7;
R4 is -H, -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
R6 is -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), - (CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle), - (CH2)n-(8- to 12-membered bicyclic heterocycle), -phenylene-(CH2)nCOOH, or- phenylene-(CH2)nCOO-(C1-C10 alkyl);
R7 is -H, -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle), or -(CH2)n-(8- to 12-membered bicyclic heterocycle);
R8 is -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or-C≡C-aryl; and
each n is independently an integer ranging from 1 to 5.
[0013] In another embodiment, the invention provides compounds having the Formula (Ib):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2ONO2;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -H, -C1-C10 alkyl, -aryl, -3- to 7-membered monocyclic heterocycle, -8- to 12-membered bicyclic
heterocycle, -C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, -C8-C12 bicyclic cycloalkyl, -C8-C12 bicyclic cycloalkenyl -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), or -(CH2)n-aryl;
R2 is -CN, -NHR4, -NHC(O)R4, -NHC(O)OR4, -NHC(O)NHR4, -NHNHC(O)R4, -NHNHC(O)OR4, -NHNHC(O)NHR4, or -NH-N=C(R6)R7;
R4 is -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or - C≡C-aryl;
R6 is -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -phenylene-(CH2)nCOOH, or -phenylene-(CH2)nCOO-(C1-C10 alkyl);
R7 is -H, -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl) or -(CH2)n-(C8-C12 bicyclic cycloalkyl); and
each n is independently an integer ranging from 1 to 5.
[0014] In still another embodiment, the invention provides compounds having the Formula
(Ic):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2NHR5;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -H, -C1-C10 alkyl, -aryl, -3- to 7-membered monocyclic heterocycle, -8- to 12-membered bicyclic
heterocycle, -C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, -C8-C12 bicyclic cycloalkyl, -C8-C12 bicyclic cycloalkenyl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl),or -(CH2)n-aryl;
R2 is -NHR4, -OR4, -SR4, -NHC(O)R4, -NHC(O)OR4, -NHC(O)NHR4, - NHNHC(O)R4, -NHNHC(O)NHR4, or -NHNHC(O)OR4;
R4 is -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or - C≡C-aryl;
R5 is -C(O)O(C1-C10 alkyl), -C(O)NH(C1-C10 alkyl), -C(O)N(C1-C10alkyl)2,-C(O)NH-aryl, -CH(NH2)NH2 or -CH(NH2)NH(C1-C10 alkyl); and
each n is independently an integer ranging from 1 to 5.
[0015] In a further embodiment, the invention provides compounds having the Formula (Id):

and pharmaceutically acceptable salts thereof,
wherein
A is -R3;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -H, -C1-C10 alkyl, -aryl, -3- to 7-membered monocyclic heterocycle, -8- to 12-membered bicyclic
heterocycle, -C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, -C3-C8 monocyclic cycloalkenyl, -C8-C12 bicyclic cycloalkyl, -C8-C12 bicyclic cycloalkenyl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), or -(CH2)n-aryl;
R2 is -H, -halo, -CN, -NHR4, -OR4, -SR4, -NHC(O)R4, -NHC(O)OR4, - NHC(O)NHR4, -NHNHC(O)R4, -NHNHC(O)NHR4, -NHNHC(O)OR4 or -NH-N=C(R6)R7;
R3 is -CH2ONO or -CH2OSO3H;
R4 is -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or - C≡C-aryl;
R6 is -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), - (CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle), - (CH2)n-(8- to 12-membered bicyclic heterocycle), -phenylene-(CH2)nCOOH, or- phenylene-(CH2)nCOO-(C1-C10 alkyl);
R7 is -H, -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle), or -(CH2)n-(8- to 12-membered bicyclic heterocycle); and
each n is independently an integer ranging from 1 to 5.
[0016] In a further embodiment, the invention provides compounds having the Formula (Ie):

and pharmaceutically acceptable salts thereof,
wherein
A is - CH2R3;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -3- to 7-membered monocyclic heterocycle, -8- to 12-membered bicyclic heterocycle,
-C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, -C8-C12 bicyclic cycloalkyl, -C8-C12 bicyclic cycloalkenyl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), or -(CH2)n-aryl;
R2 is -halo, -CN, -NHR4, -OR4, -SR4, -NHC(O)R4, -NHC(O)OR4, - NHC(O)NHR4, -NHNHC(O)R4, -NHNHC(O)OR4, -NHNHC(O)NHR4, or -NH-N=C(R6)R7;
R3 is -OSO2NH(C1-C10 alkyl), -OSO2N(C1-C10 alkyl)2, or -OSO2NH-aryl, where each C1-C10 alkyl is independent;
R4 is -C1-C15 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or-C=C-aryl;
R6 is -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), - (CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle),-(CH2)n-(8- to 12-membered bicyclic heterocycle), -phenylene-(CH2)nCOOH, or- phenylene-(CH2)nCOO-(C1-C10 alkyl);
R7 is -H, -C1-C10 alkyl, -aryl, -(CH2)n-aryl, -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(3- to 7-membered monocyclic heterocycle), or -(CH2)n-(8- to 12- membered bicyclic heterocycle); and
each n is independently an integer ranging from 1 to 5.
[0017] In another embodiment, the invention provides compounds having the Formula (If):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2ONO2;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -C3-C8 monocyclic cycloalkyl; and
R2 is -H or -halo.
[0018] In another embodiment, the invention provides compounds having the Formula (Ig):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2ONO2;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other; and
R2 is -H or -halo.
[0019] In another embodiment, the invention provides compounds having the Formula (Ih):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2ONO2;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other; and
C and D are cis or trans with respect to each other; and
R1 is cyclopent-1-ol-2-yl, or cyclopent-1-ol-3-yl.
[0020] In another embodiment, the invention provides compounds having the Formula (II):

and pharmaceutically acceptable salts thereof,
wherein
A is -CR2OR;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
each R1 is independently -H, -C1-C10 alkyl, -(CH2)m-(3- to 7-membered monocyclic heterocycle), -(CH2)m-(8- to 12-membered bicyclic heterocycle), -(CH2)m-(C8-C12 bicyclic cycloalkyl), -(CH2)m-(C8-C12 bicyclic cycloalkenyl), or -(CH2)m-aryl, or both R1 groups together with the carbon atom to which they are attached form a -C3-C8 monocyclic cycloalkyl, a -C3-C8 monocyclic cycloalkenyl, a -C8-C12 bicyclic cycloalkyl, or a -C8-C12 bicyclic cycloalkenyl;
R2 is -OR4, -SR4, -NHNHC(O)R3, -NHNHC(O)NHR3, -NHNHC(O)OR7, or-NH-N=C(R5)R6;
R3 is -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), - (CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, -O-(CH2)n-(C8-C12 bicyclic cycloalkyl), -O-(CH2)n-(C3-C8 monocyclic cycloalkyl), O-(CH2)n-(C3-C8 monocyclic cycloalkenyl), -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
R4 is -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), - (CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-aryl, or -C≡C-aryl;
R5 and R6 are each independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl,phenylene-(CH2)nCOOH, or -phenylene-(CH2)nCOO-(C1-C10 alkyl), or R5 and R6 together with the carbon atom to which they are attached form a C3-C8 monocyclic cycloalkyl or a C8-C12 bicyclic cycloalkyl;
R7 is -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), - (CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
m is an integer ranging from 0 to 3; and
each n is independently an integer ranging from 0 to 5.
[0021] In still another embodiment, the invention provides compounds having the Formula
(III):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2R3;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
each R1 is independently -H, -C1-C10 alkyl, -(CH2)m-(3- to 7-membered monocyclic heterocycle), -(CH2)m-(8- to 12-membered bicyclic heterocycle), -(CH2)m-(C3-C8 monocyclic cycloalkyl), -(CH2)m-(C3-C8 monocyclic cycloalkenyl), -(CH2)m-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), or -(CH2)m-aryl, or two R1 groups, together with the carbon atom to which they are attached, form a -C3-C8 monocyclic cycloalkyl, a -C3-C8 monocyclic cycloalkenyl, a -C8-C12 bicyclic cycloalkyl, or a -C8-C12 bicyclic cycloalkenyl;
R2 is -H, -CN, -halo, -N(R4)2, -OR4, -SR4, -NHC(O)R4, -NHC(O)OR4, - NHC(O)NHR4, -NHNHC(O)R4, -NHNHC(O)NHR4, -NHNHC(O)OR4, or -NH-N=C(R6)R7;
R3 is -ONO2, -ONO, -OSO3H, -OSO2NH2, -OSO2NH(C1-C10 alkyl), -OSO2N(C1-C10 alkyl)2, -OSO2NH-aryl or -N(R5)2;
each R4 is independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, - C(O)O(C1-C10 alkyl), -C(O)NH(C1-C10 alkyl), -C(O)N(C1-C10 alkyl)2, -C(O)NH-aryl,-C(O)N(C1-C10 alkyl)2, -CH(NH2)NH2 or -CH(NH2)NH(C1-C10 alkyl);
each R5 is independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl) or -(CH2)n-aryl;
R6 and R7 are each independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl,phenylene-(CH2)nCOOH, or -phenylene-(CH2)nCOO-(C1-C10 alkyl), or R6 and R7, together with the carbon atom to which they are attached, form a -C3-C8 monocyclic cycloalkyl, -C3-C8 monocyclic cycloalkenyl, or a C8-C12 bicyclic cycloalkenyl;
m is an integer ranging from 0 to 3; and
each n is independently an integer ranging from 0 to 5.
[0022] In a further embodiment, the invention provides compounds having the Formula (IV):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2OH;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -C3-C8 monocyclic cycloalkyl or -C3-C8 monocyclic cycloalkenyl;
R2 is -H, -halo, -CN, -OR3, -SR3, -N(R3)2, -NHNHC(O)R3, -NHNHC(O)NHR3,-NHNHC(O)OR3, or -NH-N=C(R4)R5;
each R3 is independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
R4 and R5 are each independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, - phenylene-(CH2)nCOOH, or -phenylene-(CH2)nCOO-(C1-C10 alkyl), or R4 and R5 together with the carbon atom to which they are attached form a C3-C8 monocyclic cycloalkyl, a C3-C8 monocyclic cycloalkenyl, a -C8-C12 bicyclic cycloalkyl, or a -C8-C12 bicyclic cycloalkenyl; and
each n is independently an integer ranging from 0 to 5.
[0023] In another embodiment, the invention provides compounds having the Formula (V):

and pharmaceutically acceptable salts thereof,
wherein
A is -CH2OH;
B and C are -OH;
D is

A and B are trans with respect to each other;
B and C are cis with respect to each other;
C and D are cis or trans with respect to each other;
R1 is -C1-C10 alkyl, -(CH2)m-(3- to 7-membered monocyclic heterocycle), - (CH2)m-(8- to 12-membered bicyclic heterocycle), -(CH2)m-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)m-(C3-C8 monocyclic cycloalkyl), - (CH2)m-(C3-C8 monocyclic cycloalkenyl) or -(CH2)m-aryl, or R1 and R1a together with the carbon atom to which they are attached form a -C3-C8 monocyclic cycloalkyl, a -C3-C8 monocyclic cycloalkenyl, a -C8-C12 bicyclic cycloalkyl, or a -C8-C12 bicyclic cycloalkenyl;
R1a is -C3-C8 monocyclic cycloalkyl or -C3-C8 monocyclic cycloalkenyl;
R2 is -OR4, -SR4, -NHNHC(O)R3, -NHNHC(O)NHR3, -NHNHC(O)OR3, or-NH-N=C(R5)R6;
R3 is -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle),-(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
R4 is -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle),-(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-aryl, -C≡C-(C1-C10 alkyl) or -C≡C-aryl;
R5 and R6 are each independently -H, -C1-C10 alkyl, -(CH2)n-(3- to 7-membered monocyclic heterocycle), -(CH2)n-(8- to 12-membered bicyclic heterocycle), -(CH2)n-(C3-C8 monocyclic cycloalkyl), -(CH2)n-(C3-C8 monocyclic cycloalkenyl), -(CH2)n-(C8-C12 bicyclic cycloalkyl), -(CH2)n-(C8-C12 bicyclic cycloalkenyl), -(CH2)n-aryl, - phenylene-(CH2)nCOOH, or -phenylene-(CH2)nCOO-(C1-C10 alkyl), or R5 and R6 together with the carbon atom to which they are attached form a C3-C8 monocyclic cycloalkyl, a C3-C8 monocyclic cycloalkenyl, a -C8-C12 bicyclic cycloalkyl, or a -C8-C12 bicyclic cycloalkenyl;
m is an integer ranging from 0 to 3; and
each n is independently an integer ranging from 0 to 5.
[0024] A compound of Formula (Ia), (Ib), (Ic), (Id), (Ie), (If), (Ig), (Ih), (II), (III),
(IV) or (V) or a pharmaceutically acceptable salt thereof, (a "Purine Derivative")
is useful for: (i) treating or preventing a cardiovascular disease, a neurological
disorder, an ischemic condition, a reperfusion injury, obesity, a wasting disease,
or diabetes (each being a "Condition"); (ii) reducing an animal's rate of metabolism;
or (iii) protecting an animal's heart against myocardial damage during cardioplegia.
[0025] The invention also provides compositions comprising an effective amount of a Purine
Derivative and a physiologically acceptable carrier or vehicle. The compositions are
useful for: (i) treating or preventing a Condition; (ii) reducing an animal's rate
of metabolism; or (iii) protecting an animal's heart against myocardial damage during
cardioplegia.
[0026] The invention further provides uses of effective amounts of Purine Derivatives in
the preparation of medicaments for: (i) treating or preventing a Condition; (ii) reducing
an animal's rate of metabolism; or (iii) protecting an animal's heart against myocardial
damage during cardioplegia.
[0027] The details of the invention are set forth in the accompanying description below.
Other features, objects, and advantages of the invention will be apparent from the
description and from the claims.
4. BRIEF DESCRIPTION OF THE DRAWINGS
[0028]
FIG. 1 shows the effect of Compound 17 on lipopolysaccharide induced plasma TNF and MIP
production in male BALB/c mice. The unshaded bars represent LPS, administered i.p.
at a dose of 1 mg/kg and the shaded bars represent Compound 17, administered orally
at a dose of 0.03 mg/kg, followed 30 minutes later by LPS, administered i.p. at a
dose of 1 mg/kg. TNF and MIP levels were measured 90 minutes after LPS administration.
FIG. 2 shows the effect of Compound 17 in survival studies in male BALB/c mice, expressed
as the percentage of surviving animals at 10-hour time intervals. Line -□- represents
LPS, administered i.p. at a dose of 55 mg/kg, and line -◆- represents Compound 17,
administered orally at a dose of 0.03 mg/kg, followed 30 minutes later by LPS, administered
i.p. at a dose of 55 mg/kg.
FIG. 3 shows the effects of Compound 17 on the duration of ischemia-induced arrhythmias
in isolated perfused rat hearts. The bar graph from left to right, represents: a non-treated
control group, Compound 17 administered at 10 pM, Compound 17 administered at 30 pM,
and Compound 17 administered at 100 pM, respectively.
FIG. 4 shows the effect of Compound 17 on function recovery in isolated perfused rat hearts
after 30 minute no-flow ischemia followed by 40 minute reperfusion. Line -▲- represents
a non-treated control group (n = 13) and line -■- represents administration (n = 9)
of Compound 17 at a concentration of 1nM, administered 10 minutes prior to induction
of ischemia.
FIG. 5 shows the effect of Compound 17 and/or buprenorphine in an acute pain model in mice
using a tail flick assay. The Y-axis represents Maximum Possible Effect (MPE) and
the X-axis represents time after administration of Compound 17 and/or buprenorphine.
Line -●- represents co-administration of buprenorphine (1.0 mg/kg) and Compound 17
(3.0 mg/kg), line -■- represents buprenorphine (1.0 mg/kg), line -▲- represents Compound
17 (3.0 mg/kg), line -X- represents co-administration of buprenorphine (0.3 mg/kg)
and Compound 17 (3.0 mg/kg), and line

represents buprenorphine (0.3 mg/kg).
FIG. 6 shows the effect of Compound 17 in a mouse formalin pain model pain. The bar graph
from left to right shows the first phase of the test (no response) and the second
phase of the test (shaded bar).
FIG. 7 shows the effect of Compound 17 on allodynia in a mouse model of diabetic neuropathy.
The Y-axis represents the animal's pain threshold and the X-axis represents time after
administration of Compound 17. Line -●- represents treatment with Compound 17 (1.0
mg/kg).
FIG. 8 shows the effect of Compound 17 on mechanically induced pain threshold in a carrageenan
rat model. The Y-axis represents the animal's pain threshold and the X-axis represents
time after administration of Compound 17. Line -○- represents vehicle and line -■-
represents Compound 17 (5.0 mg/kg).
FIG. 9 shows the effect of Compound 17 and/or buprenorphine on pain threshold in a mouse
model of sciatic nerve ligation. The Y-axis represents the animal's pain threshold
and the X-axis represents time after administration of Compound 17 and.or buprenorphine.
The top left graph shows the effect of vehicle, the top right graph shows the effect
of Compound 17 (0.1 mg/kg), the bottom left graph shows the effect of buprenorphine
(0.3 mg/kg) and the bottom right graph shows the effect of co-administration of Compound
17 (0.1 mg/kg) and buprenorphine (0.3 mg/kg). Line -◆- represents the response of
the control leg and line -■- represents the response of the treated leg.
5. DETAILED DESCRIPTION OF THE INVENTION
5.1 DEFINITIONS
[0029] The term "C
1-C
15 alkyl" as used herein refers to a straight or branched chain, saturated hydrocarbon
having from 1 to 15 carbon atoms. Representative C
1-C
15 alkyl groups include, but are not limited to methyl, ethyl, propyl, isopropyl, butyl,
sec-butyl, tert-buty, pentyl, isopentyl, neopentyl, hexyl, isohexyl, neohexyl, heptyl,
isoheptyl, neoheptyl, octyl, isooctyl, neooctyl, nonyl, isononyl, neononyl, decyl,
isodecyl, neodecyl, undecyl, dodecyl, tridecyl, tetradecyl and pentadecyl. In one
embodiment, the C
1-C
15 alkyl group is substituted with one or more of the following groups: -halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the C
1-C
15 alkyl is unsubstituted.
[0030] The term "C
1-C
10 alkyl" as used herein refers to a straight or branched chain, saturated hydrocarbon
having from 1 to 10 carbon atoms. Representative C
1-C
10 alkyl groups include, but are not limited to methyl, ethyl, propyl, isopropyl, butyl,
sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, isohexyl, neohexyl, heptyl,
isoheptyl, neoheptyl, octyl, isooctyl, neooctyl, nonyl, isononyl, neononyl, decyl,
isodecyl and neodecyl. In one embodiment, the C
1-C
10 alkyl group is substituted with one or more of the following groups: -halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', - OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the C
1-C
10 alkyl is unsubstituted.
[0031] The term "C
1-C
6 alkyl" as used herein refers to a straight or branched chain; saturated hydrocarbon
having from 1 to 6 carbon atoms. Representative C
1-C
6 alkyl groups include, but are not limited to methyl, ethyl, propyl, isopropyl, butyl,
sec-butyl, tert-buty, pentyl, isopentyl, neopentyl, hexyl, isohexyl, and neohexyl. Unless
indicated, the C
1-C
6 alkyl is unsubstituted.
[0032] The term "aryl" as used herein refers to a phenyl group or a naphthyl group. In one
embodiment, the aryl group is substituted with one or more of the following groups:
-halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2,-NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the aryl is unsubstituted.
[0033] The term "C
3-C
8 monocyclic cycloalkyl" as used herein is a 3-, 4-, 5-, 6-, 7- or 8-membered saturated
non-aromatic monocyclic cycloalkyl ring. Representative C
3-C
8 monocyclic cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl,
cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl. In one embodiment, the C
3-C
8 monocyclic cycloalkyl group is substituted with one or more of the following groups:
-halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the C
3-C
8 monocyclic cycloalkyl is unsubstituted.
[0034] The term "C
3-C
8 monocyclic cycloalkenyl" as used herein is a 3-, 4-, 5-, 6-, 7- or 8-membered non-aromatic
monocyclic carbocyclic ring having at least one endocyclic double bond, but which
is not aromatic. It is to be understood that when any two groups, together with the
carbon atom to which they are attached form a C
3-C
8 monocyclic cycloalkenyl group, the carbon atom to which the two groups are attached
remains tetravalent. Representative C
3-C
8 monocyclic cycloalkenyl groups include, but are not limited to, cyclopropenyl, cyclobutenyl,
1,3-cyclobutadienyl, cyclopentenyl, 1,3-cyclopentadienyl, cyclohexenyl, 1,3-cyclohexadienyl,
cycloheptenyl, 1,3-cycloheptadienyl, 1,4-cycloheptadienyl, -1,3,5-cycloheptatrienyl,
cyclooctenyl, 1,3-cyclooctadienyl, 1,4-cyclooctadienyl, -1,3,5-cyclooctatrienyl. In
one embodiment, the C
3-C
8 monocyclic cycloalkenyl group is substituted with one or more of the following groups:
-halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the C
3-C
8 monocyclic cycloalkenyl is unsubstituted.
[0035] The term "C
8-C
12 bicyclic cycloalkyl" as used herein is a 8-, 9-, 10-, 11- or 12-membered saturated,
non-aromatic bicyclic cycloalkyl ring system. Representative C
8-C
12 bicyclic cycloalkyl groups include, but are not limited to, decahydronaphthalene,
octahydroindene, decahydrobenzocycloheptene, and dodecahydroheptalene. In one embodiment,
the C
8-C
12 bicyclic cycloalkyl group is substituted with one or more of the following groups:
-halo, -O-(C
1-C
6 alkyl), -OH,-CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl.
[0036] Unless indicated, the C
8-C
12 bicyclic cycloalkyl is unsubstituted.
[0037] The term "C
8-C
12 bicyclic cycloalkenyl" as used herein is a 8-, 9-, 10-, 11- or 12-membered non-aromatic
bicyclic cycloalkyl ring system, having at least one endocyclic double bond. It is
to be understood that when any two groups, together with the carbon atom to which
they are attached form a C
8-C
12 bicyclic cycloalkenyl group, the carbon atom to which the two groups are attached
remains tetravalent. Representative C
8-C
12 bicyclic cycloalkenyl groups include, but are not limited to, octahydronaphthalene,
hexahydronaphthalene, hexahydroindene, tetrahydroindene, octahydrobenzocycloheptene,
hexahydrobenzocycloheptene, tetrahydrobenzocyclopheptene, decahydroheptalene, octahydroheptalene,
hexahydroheptalene, and tetrahydroheptalene. In one embodiment, the C
8-C
12 bicyclic cycloalkyl group is substituted with one or more of the following groups:
-halo, -O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the C
8-C
12 bicyclic cycloalkenyl is unsubstituted.
[0038] The term "effective amount" as used herein refers to an amount of a Purine Derivative
that is effective for use in the preparation of a medicament for: (i) treating or
preventing a Condition; (ii) reducing an animal's rate of metabolism; or (iii) protecting
an animal's heart against myocardial damage during cardioplegia.
[0039] The term "halo" as used herein refers to -F, -Cl, -Br or-I.
[0040] The term "3- to 7-membered monocyclic heterocycle" refers to: (i) a 3- or 4-membered
non-aromatic monocyclic cycloalkyl in which 1 of the ring carbon atoms has been replaced
with an N, O or S atom; or (ii) a 5-, 6-, or 7-membered aromatic or non-aromatic monocyclic
cycloalkyl in which 1-4 of the ring carbon atoms have been independently replaced
with a N, O or S atom. The non-aromatic 3- to 7-membered monocyclic heterocycles can
be attached via a ring nitrogen, sulfur, or carbon atom. The aromatic 3- to 7-membered
monocyclic heterocycles are attached via a ring carbon atom. Representative examples
of a 3- to 7-membered monocyclic heterocycle group include, but are not limited to
furanyl, furazanyl, imidazolidinyl, imidazolinyl, imidazolyl, isothiazolyl, isoxazolyl,
morpholinyl, oxadiazolyl, oxazolidinyl, oxazolyl, oxazolidinyl, pyrimidinyl, phenanthridinyl,
phenanthrolinyl, piperazinyl, piperidinyl, pyranyl, pyrazinyl, pyrazolidinyl, pyrazolinyl,
pyrazolyl, pyridazinyl, pyridooxazole, pyridoimidazole, pyridothiazole, pyridinyl,
pyrimidinyl, pyrrolidinyl, pyrrolinyl, quinuclidinyl, tetrahydrofuranyl, thiadiazinyl,
thiadiazolyl, thienyl, thienothiazolyl, thienooxazolyl, thienoimidazolyl, thiomorpholinyl,
thiophenyl, triazinyl, triazolyl, In one embodiment, the 3- to 7-membered monocyclic
heterocycle group is substituted with one or more of the following groups: -halo,
-O-(C
1-C
6 alkyl), -OH, -CN, -COOR', - OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the 3- to 7-membered monocyclic heterocycle is unsubstituted.
[0041] The term "8- to 12-membered bicyclic heterocycle" refers to a bicyclic 8-to 12-membered
aromatic or non-aromatic bicyclic cycloalkyl in which one or both of the of the rings
of the bicyclic ring system have 1-4 of its ring carbon atoms independently replaced
with a N, O or S atom. Included in this class are 3- to 7- membered monocyclic heterocycles
that are fused to a benzene ring. A non-aromatic ring of an 8- to 12-membered monocyclic
heterocycle is attached via a ring nitrogen, sulfur, or carbon atom. An aromatic 8-
to 12-membered monocyclic heterocycles are attached via a ring carbon atom. Examples
of 8- to 12-membered bicyclic heterocycles include, but are not limited to, benzimidazolyl,
benzofuranyl, benzothiofuranyl, benzothiophenyl, benzoxazolyl, benzthiazolyl, benztriazolyl,
benztetrzolyl, benzisoxazolyl, benzisothiazolyl, benzimidazolinyl, cinnolinyl, decahydroquinolinyl,
1H-indazolyl, indolenyl, indolinyl, indolizinyl, indolyl, isobenzofuranyl, isoindazolyl,
isoindolyl, isoindolinyl, isoquinolinyl, naphthyridinyl, octahydroisoquinolinyl, phthalazinyl,
pteridinyl, purinyl, quinoxalinyl, tetrahydroisoquinolinyl, tetrahydroquinolinyl,
and xanthenyl. In one embodiment, each ring of a the -8- to 12- membered bicyclic
heterocycle group can substituted with one or more of the following groups: -halo,
-O-(C
1-C
6 alkyl), -OH, -CN, -COOR', -OC(O)R', -N(R')
2, -NHC(O)R' or -C(O)NHR' groups wherein each R' is independently -H or unsubstituted
-C
1-C
6 alkyl. Unless indicated, the 8- to 12-membered bicyclic heterocycle is unsubstituted.
[0042] Representative examples of a "phenylene group" are depicted below:

[0043] The phrase "pharmaceutically acceptable salt," as used herein, is a salt of an acid
and a basic nitrogen atom of a Purine Derivative. Illustrative salts include, but
are not limited, to sulfate, citrate, acetate, oxalate, chloride, bromide, iodide,
nitrate, bisulfate, phosphate, acid phosphate, isonicotinate, lactate, salicylate,
acid citrate, tartrate, oleate, tannate, pantothenate, bitartrate, ascorbate, succinate,
maleate, gentisinate, fumarate, gluconate, glucaronate, saccharate, formate, benzoate,
glutamate, methanesulfonate, ethanesulfonate, benzenesulfonate,
p-toluenesulfonate, and pamoate (
i.e., 1,1'-methylene-bis-(2-hydroxy-3-naphthoate)) salts. The pharmaceutically acceptable
salt can also be a camphorsulfonate salt. The term "pharmaceutically acceptable salt"
also refers to a salt of a Purine Derivative having an acidic functional group, such
as a carboxylic acid functional group, and a base. Suitable bases include, but are
not limited to, hydroxides of alkali metals such as sodium, potassium, and lithium;
hydroxides of alkaline earth metal such as calcium and magnesium; hydroxides of other
metals, such as aluminum and zinc; ammonia, and organic amines, such as unsubstituted
or hydroxy-substituted mono-, di-, or tri-alkylamines, dicyclohexylamine; tributyl
amine; pyridine; N-methyl, N-ethylamine; diethylamine; triethylamine; mono-, bis-,
or tris-(2-OH-lower alkylamines), such as mono-; bis-, or tris-(2-hydroxyethyl)amine,
2-hydroxy-tert-butylamine, or tris-(hydroxymethyl)methylamine, N,N-di-lower alkyl-N-(hydroxyl-lower
alkyl)-amines, such as N,N-dimethyl-N-(2-hydroxyethyl)amine or tri-(2-hydroxyethyl)amine;
N-methyl-D-glucamine; and amino acids such as arginine, lysine, and the like. The
term "pharmaceutically acceptable salt" also includes a hydrate of a Purine Derivative.
[0044] An "animal" is a mammal,
e.g., a human, mouse, rat, guinea pig, dog, cat, horse, cow, pig, or non-human primate,
such as a monkey, chimpanzee, baboon or rhesus. In one embodiment, an animal is a
human.
[0045] The term "isolated and purified" as used herein means separate from other components
of a reaction mixture or natural source. In certain embodiments, the isolate contains
at least 30%, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%,
at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%,
at least 90%, at least 95% or at least 98% of a Purine Derivative by weight of the
isolate. In one embodiment, the isolate contains at least 95% of a Purine Derivative
by weight of the isolate.
[0046] The term "substantially free of its corresponding opposite enantiomer" as used herein,
means that a Purine Derivative contains no more than about 10% by weight of its corresponding
opposite enantiomer. In one embodiment the Purine Derivative that is substantially
free of its corresponding opposite enantiomer contains no more than about 5% by weight
of its corresponding opposite enantiomer. In a further embodiment a Purine Derivative
that is substantially free of its corresponding opposite enantiomer contains no more
than about 1% by weight of its corresponding opposite enantiomer. In another embodiment
a Purine Derivative that is substantially free of its corresponding opposite enantiomer
contains no more than about 0.5% by weight of its corresponding opposite enantiomer.
In still another embodiment a Purine Derivative that is substantially free of its
corresponding opposite enantiomer contains no more than about 0.1 % by weight of its
corresponding opposite enantiomer.
[0047] The term "substantially free of its corresponding other anomer" as used herein, means
that a Purine Derivative contains no more than about 10% by weight of its corresponding
other anomer. In one embodiment the Purine Derivative that is substantially free of
its corresponding other anomer contains no more than about 5% by weight of its corresponding
other anomer. In a further embodiment a Purine Derivative that is substantially free
of its corresponding other anomer contains no more than about 1% by weight of its
corresponding other anomer. In another embodiment a Purine Derivative that is substantially
free of its corresponding other anomer contains no more than about 0.5% by weight
of its corresponding other anomer. In still another embodiment a Purine Derivative
that is substantially free of its corresponding other anomer contains no more than
about 0.1% by weight of its corresponding other anomer.
[0048] Some chemical structures herein are depicted using bold and dashed lines to represent
chemical bonds. These bold and dashed lines depict absolute stereochemistry. A bold
line indicates that a substituent is above the plane of the carbon atom to which it
is attached and a dashed line indicates that a substituent is below the plane of the
carbon atom to which it is attached. For example, in the illustration below:

group A is above the plane of the carbon atom to which it is attached and group B
is below the plane of the carbon atom to which it is attached.
[0049] The following abbreviations are used herein and have the indicated definitions: Ac
2O is acetic anhydride; ATP is adenosine triphosphate; CCPA is 2-chloro-N
6-cyclopentyladenosine; CPA is N
6-cyclopentyladenosine; CSA is camphorsulfonic acid; CHO is chinese hamster ovary;
DMF is N,N-dimethylformamide; EGTA is ethylene glycol bis (3-aminoethyl ether)-N,N,N',N'-tetraacetic
acid; EtNH
2 is ethylamine; EtOAc is ethyl acetate; EtOH is ethanol; LiHMDS is lithium hexamethyldisilazide;
MeOH is methanol; MS is mass spectrometry; NECA is adenosine-5'-(N-ethyl)carboxamido;
NMR is nuclear magnetic resonance; R-PIA is N
6-(2-phenyl-isopropyl) adenosine, R-isomer; TFA is trifluoroacetic acid; THF is tetrahydrofuran;
TMSOTf is trimethylsilyl trifluoromethanesulfonate.
5.2 THE PURINE DERIVATIVES
5.2.1 THE PURINE DERIVATIVES OF FORMULA (Ia)
[0050] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ia):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ia),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0051] In one embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0052] In a specific embodiment, R
1 is cyclopentyl.
[0053] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0054] In another embodiment, Tri is -C
8-C
12 bicyclic cycloalkyl or -C
8-C
12 bicyclic cycloalkenyl.
[0055] In still another embodiment, R
1 is -(CH
2)
n-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
n-(C
3-C
8 monocyclic cycloalkenyl).
[0056] In one embodiment, R
2 is -halo.
[0057] In a specific embodiment, R
2 is -Cl.
[0058] In another embodiment, R
2 is -CN.
[0059] In another embodiment, R
2 is -NHR
8, -OR
8 or -SR
8.
[0060] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
8 or - NHC(O)NHR
8.
[0061] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
8 or - NHNHC(O)NHR
8. In yet another embodiment, R
2 is -NH-N=C(R
6)R
7.
[0062] In one embodiment, C and D are
cis with respect to each other.
[0063] In another embodiment, C and D are
trans with respect to each other.
[0064] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ia) and a physiologically acceptable carrier or vehicle.
[0065] The invention further provides Purine Derivatives of Formula (Ia) that are in isolated
and purified form.
[0066] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (Ia) for the preparation of a medicament for treating or preventing a Condition,
in an animal in need thereof.
[0067] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ia) for the preparation of a medicament for reducing an animal's rate of
metabolism, in an animal in need thereof.
[0068] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ia) for the preparation of a medicament for protecting an animal's heart
against myocardial damage during cardioplegia, in an animal in need thereof.
[0069] The Purine Derivatives of Formula (Ia) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ia') or Formula (Ia"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ia).
[0070] A Purine Derivative of Formula (Ia') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ia") when group A of the Purine Derivative of Formula
(Ia') is the same as group A of the Purine Derivative of Formula (Ia") and when group
D of the Purine Derivative of Formula (Ia') is the same as group D of the Purine Derivative
of Formula (Ia").
[0071] A Purine Derivative of Formula (Ia") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ia') when group A of the Purine Derivative of Formula
(Ia") is the same as group A of the Purine Derivative of Formula (Ia') and when group
D of the Purine Derivative of Formula (Ia") is the same as group D of the Purine Derivative
of Formula (Ia').
[0072] In one embodiment, the Purine Derivatives of Formula (Ia) have the formula (Ia'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Ia') are substantially
free of their corresponding opposite enantiomer.
[0073] In another embodiment, the Purine Derivatives of Formula (Ia) have the formula (Ia"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Ia") are substantially
free of their corresponding opposite enantiomer.
[0074] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Ia') and a Purine Derivative of Formula (Ia")
wherein the amount of the Purine Derivative of Formula (Ia') exceeds the amount of
the Purine Derivative of Formula (Ia").
[0075] In a further embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Ia') and a Purine Derivative of Formula (Ia") wherein
the amount of the Purine Derivative of Formula (Ia") exceeds the amount of the Purine
Derivative of Formula (Ia').
[0076] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a racemic
mixture of a Purine Derivative of Formula (Ia') and a Purine Derivative of Formula
(Ia").
[0077] In another embodiment, the Purine Derivatives of Formula (Ia) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Iaa') or (Iaa"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ia).
[0078] A Purine Derivative of Formula (Iaa') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iaa") when group A of the Purine Derivative of Formula
(Iaa') is the same as group A of the Purine Derivative of Formula (Iaa") and when
group D of the Purine Derivative of Formula (Iaa') is the same as group D of the Purine
Derivative of Formula (Iaa").
[0079] A Purine Derivative of Formula (Iaa") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iaa') when group A of the Purine Derivative of Formula
(Iaa") is the same as group A of the Purine Derivative of Formula (Iaa') and when
group D of the Purine Derivative of Formula (Iaa") is the same as group D of the Purine
Derivative of Formula (Iaa').
[0080] In one embodiment, the Purine Derivatives of Formula (Ia) have the formula (Iaa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Iaa') are substantially
free of their corresponding opposite enantiomer.
[0081] In another embodiment, the Purine Derivatives of Formula (Ia) have the formula (Iaa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Iaa") are substantially
free of their corresponding opposite enantiomer.
[0082] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Iaa') and a Purine Derivative of Formula (Iaa")
wherein the amount of the Purine Derivative of Formula (Iaa') exceeds the amount of
the Purine Derivative of Formula (Iaa").
[0083] In a further embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Iaa') and a Purine Derivative of Formula (Iaa")
wherein the amount of the Purine Derivative of Formula (Iaa") exceeds the amount of
the Purine Derivative of Formula (Iaa').
[0084] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a racemic
mixture of a Purine Derivative of Formula (Iaa') and a Purine Derivative of Formula
(Iaa").
[0085] A Purine Derivative of Formula (Iaa') is the corresponding other anomer of a Purine
Derivative of Formula (Ia') when group A of the Purine Derivative of Formula (Iaa')
is the same as group A of the Purine Derivative of Formula (Ia') and when group D
of the Purine Derivative of Formula (Iaa') is the same as group D of the Purine Derivative
of Formula (Ia').
[0086] A Purine Derivative of Formula (Ia') is the corresponding other anomer of a Purine
Derivative of Formula (Iaa') when group A of the Purine Derivative of Formula (Ia')
is the same as group A of the Purine Derivative of Formula (Iaa') and when group D
of the Purine Derivative of Formula (Ia') is the same as group D of the Purine Derivative
of Formula (Iaa').
[0087] A Purine Derivative of Formula (Iaa") is the corresponding other anomer of a Purine
Derivative of Formula (Ia") when group A of the Purine Derivative of Formula (Iaa")
is the same as group A of the Purine Derivative of Formula (Ia") and when group D
of the Purine Derivative of Formula (Iaa") is the same as group D of the Purine Derivative
of Formula (Ia").
[0088] A Purine Derivative of Formula (Ia") is the corresponding other anomer of a Purine
Derivative of Formula (Iaa") when group A of the Purine Derivative of Formula (Ia")
is the same as group A of the Purine Derivative of Formula (Iaa") and when group D
of the Purine Derivative of Formula (Ia") is the same as group D of the Purine Derivative
of Formula (Iaa").
[0089] In one embodiment, the Purine Derivatives of Formula (Ia) have the formula (Iaa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Iaa') are substantially
free of their corresponding other anomer.
[0090] In another embodiment, the Purine Derivatives of Formula (Ia) have the formula (Iaa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Iaa") are substantially
free of their corresponding other anomer.
[0091] In one embodiment, the Purine Derivatives of Formula (Ia) have the formula (Ia'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Ia') are substantially
free of their corresponding other anomer.
[0092] In another embodiment, the Purine Derivatives of Formula (Ia) have the formula (Ia"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ia), and wherein the Purine Derivatives of Formula (Ia") are substantially
free of their corresponding other anomer.
[0093] In one embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture of a
Purine Derivative of Formula (Ia') and a Purine Derivative of Formula (Iaa')
wherein the amount of the Purine Derivative of Formula (Ia') exceeds the amount of
the Purine Derivative of Formula (Iaa').
[0094] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Ia') and a Purine Derivative of Formula (Iaa')
wherein the amount of the Purine Derivative of Formula (Iaa') exceeds the amount of
the Purine Derivative of Formula (Ia').
[0095] In a further embodiment, the Purine Derivatives of Formula (Ia) exist as a equal
mixture of a Purine Derivative of Formula (Ia') and a Purine Derivative of Formula
(Iaa').
[0096] In one embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture of a
Purine Derivative of Formula (Ia") and a Purine Derivative of Formula (Iaa") wherein
the amount of the Purine Derivative of Formula (Ia") exceeds the amount of the Purine
Derivative of Formula (Iaa").
[0097] In another embodiment, the Purine Derivatives of Formula (Ia) exist as a mixture
of a Purine Derivative of Formula (Ia") and a Purine Derivative of Formula (Iaa")
wherein the amount of the Purine Derivative of Formula (Iaa") exceeds the amount of
the Purine Derivative of Formula (Ia").
[0098] In a further embodiment, the Purine Derivatives of Formula (Ia) exist as a equal
mixture of a Purine Derivative of Formula (Ia") and a Purine Derivative of Formula
(Iaa").
5.2.2 THE PURINE DERIVATIVES OF FORMULA (Ib)
[0099] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ib):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ib),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0100] In one embodiment, R
1 is -H.
[0101] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0102] In a specific embodiment, R
1 is cyclopentyl.
[0103] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0104] In another embodiment, R
1 is -C
8-C
12 bicyclic cycloalkyl or -C
8-C
12 bicyclic cycloalkenyl.
[0105] In still another embodiment, R
1 is -(CH
2)
n-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
n-(C
3-C
8 monocyclic cycloalkenyl).
[0106] In another embodiment, R
2 is -CN.
[0107] In another embodiment, R
2 is -NHR
4.
[0108] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
4 or - NHC(O)NHR
4.
[0109] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
4 or - NHNHC(O)NHR
4.
[0110] In yet another embodiment, R
2 is -NH-N=C(R
6)R
7.
[0111] In one embodiment, C and D are
cis with respect to each other.
[0112] In another embodiment, C and D are
trans with respect to each other.
[0113] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ib) and a physiologically acceptable carrier or vehicle.
[0114] The invention further provides Purine Derivatives of Formula (Ib) that are in isolated
and purified form.
[0115] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (Ib) for the preparation of a medicament for treating or preventing a Condition,
in an animal in need thereof.
[0116] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ib) for the preparation of a medicament for reducing an animal's rate of
metabolism, in animal in need thereof.
[0117] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ib) for the preparation of a medicament protecting an animal's heart against
myocardial damage during cardioplegia, of Formula in an animal in need thereof.
[0118] The Purine Derivatives of Formula (Ib) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ib') or Formula (Ib"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ib).
[0119] A Purine Derivative of Formula (Ib') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ib") when group A of the Purine Derivative of Formula
(Ib') is the same as group A of the Purine Derivative of Formula (Ib") and when group
D of the Purine Derivative of Formula (Ib') is the same as group D of the Purine Derivative
of Formula (Ib").
[0120] A Purine Derivative of Formula (Ib") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ib') when group A of the Purine Derivatives of Formula
(Ib") is the same as group A of the Purine Derivative of Formula (Ib') and when group
D of the Purine Derivative of Formula (Ib") is the same as group D of the Purine Derivative
of Formula (Ib').
[0121] In one embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ib'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ib') are substantially
free of their corresponding enantiomer, represented by Formula (Ib").
[0122] In another embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ib"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ib") are substantially
free of their corresponding enantiomer, represented by Formula (Ib').
[0123] In one embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture of a
Purine Derivative of Formula (Ib') and a Purine Derivative of Formula (Ib") wherein
the amount of the Purine Derivative of Formula (Ib') exceeds the amount of the Purine
Derivative of Formula (Ib").
[0124] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture
of a Purine Derivative of Formula (Ib') and a Purine Derivative of Formula (Ib") wherein
the amount of the Purine Derivative of Formula (Ib") exceeds the amount of the Purine
Derivative of Formula (Ib').
[0125] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a racemic
mixture of a Purine Derivative of Formula (Ib') and a Purine Derivative of Formula
(Ib").
[0126] In another embodiment, the Purine Derivatives of Formula (Ib) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Ibb') or (Ibb"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ib).
[0127] A Purine Derivative of Formula (Ibb') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ibb") when group A of the Purine Derivative of Formula
(Ibb') is the same as group A of the Purine Derivative of Formula (Ibb") and when
group D of the Purine Derivative of Formula (Ibb') is the same as group D of the Purine
Derivative of Formula (Ibb").
[0128] A Purine Derivative of Formula (Ibb") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ibb') when group A of the Purine Derivative of Formula
(Ibb") is the same as group A of the Purine Derivative of Formula (Ibb') and when
group D of the Purine Derivative of Formula (Ibb") is the same as group D of the Purine
Derivative of Formula (Ibb').
[0129] In one embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ibb'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ibb') are substantially
free of their corresponding opposite enantiomer.
[0130] In another embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ibb"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ibb") are substantially
free of their corresponding opposite enantiomer.
[0131] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture
of a Purine Derivative of Formula (Ibb') and a Purine Derivative of Formula (Ibb")
wherein the amount of the Purine Derivative of Formula (Ibb') exceeds the amount of
the Purine Derivative of Formula (Ibb").
[0132] In a further embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture
of a Purine Derivative of Formula (Ibb') and a Purine Derivative of Formula (Ibb")
wherein the amount of the Purine Derivative of Formula (Ibb") exceeds the amount of
the Purine Derivative of Formula (Ibb').
[0133] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a racemic
mixture of a Purine Derivative of Formula (Ibb') and a Purine Derivative of Formula
(Ibb").
[0134] A Purine Derivative of Formula (Ibb') is the corresponding other anomer of a Purine
Derivative of Formula (Ib') when group A of the Purine Derivative of Formula (Ibb')
is the same as group A of the Purine Derivative of Formula (Ib') and when group D
of the Purine Derivative of Formula (Ibb') is the same as group D of the Purine Derivative
of Formula (Ib').
[0135] A Purine Derivative of Formula (Ib') is the corresponding other anomer of a Purine
Derivative of Formula (Ibb') when group A of the Purine Derivative of Formula (Ib')
is the same as group A of the Purine Derivative of Formula (Ibb') and when group D
of the Purine Derivative of Formula (Ib') is the same as group D of the Purine Derivative
of Formula (Ibb').
[0136] A Purine Derivative of Formula (Ibb") is the corresponding other anomer of a Purine
Derivative of Formula (Ib") when group A of the Purine Derivative of Formula (Ibb")
is the same as group A of the Purine Derivative of Formula (Ib") and when group D
of the Purine Derivative of Formula (Ibb") is the same as group D of the Purine Derivative
of Formula (Ib").
[0137] A Purine Derivative of Formula (Ib") is the corresponding other anomer of a Purine
Derivative of Formula (Ibb") when group A of the Purine Derivative of Formula (Ib")
is the same as group A of the Purine Derivative of Formula (Ibb") and when group D
of the Purine Derivative of Formula (Ib") is the same as group D of the Purine Derivative
of Formula (Ibb").
[0138] In one embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ibb'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ibb') are substantially
free of their corresponding other anomer.
[0139] In another embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ibb"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ibb") are substantially
free of their corresponding other anomer.
[0140] In one embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ib'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ib') are substantially
free of their corresponding other anomer.
[0141] In another embodiment, the Purine Derivatives of Formula (Ib) have the formula (Ib"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ib), and wherein the Purine Derivatives of Formula (Ib") are substantially
free of their corresponding other anomer.
[0142] In one embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture of a
Purine Derivative of Formula (Ib') and a Purine Derivative of Formula (Ibb') wherein
the amount of the Purine Derivative of Formula (Ib') exceeds the amount of the Purine
Derivative of Formula (Ibb').
[0143] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture
of a Purine Derivative of Formula (Ib') and a Purine Derivative of Formula (Ibb')
wherein the amount of the Purine Derivative of Formula (Ibb') exceeds the amount of
the Purine Derivative of Formula (Ib').
[0144] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a equal mixture
of a Purine Derivative of Formula (Ib') and a Purine Derivative of Formula (Ibb').
[0145] In one embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture of a
Purine Derivative of Formula (Ib") and a Purine Derivative of Formula (Ibb") wherein
the amount of the Purine Derivative of Formula (Ib") exceeds the amount of the Purine
Derivative of Formula (Ibb").
[0146] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a mixture
of a Purine Derivative of Formula (Ib") and a Purine Derivative of Formula (Ibb")
wherein the amount of the Purine Derivative of Formula (Ibb") exceeds the amount of
the Purine Derivative of Formula (Ib").
[0147] In another embodiment, the Purine Derivatives of Formula (Ib) exist as a equal mixture
of a Purine Derivative of Formula (Ib") and a Purine Derivative of Formula (Ibb").
[0148] Illustrative Purine Derivatives of Formula (Ib) include the compound listed below:

5.2.3 THE PURINE DERIVATIVES OF FORMULA (Ic)
[0149] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ic):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ic),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0150] In one embodiment, R
1 is -H.
[0151] In another embodiment, R
1 is -C
1-C
10 alkyl.
[0152] In one embodiment, R
1 is -aryl or -(CH
2)
n-aryl.
[0153] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0154] In a specific embodiment, R
1 is cyclopentyl.
[0155] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0156] In another embodiment, R
1 is -C
8-C
12 bicyclic cycloalkyl or -C
8-C
12 bicyclic cycloalkenyl.
[0157] In still another embodiment, R
1 is -(CH
2)
n-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
n-(C
3-C
8 monocyclic cycloalkenyl).
[0158] In another embodiment, R
1 is -3- to 7-membered monocyclic heterocycle or -8- to 12-membered bicyclic heterocycle.
[0159] In another embodiment, R
2 is -NHR
4, -OR
4 or -SR
4.
[0160] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
4 or - NHC(O)NHR
4.
[0161] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
4 or - NHNHC(O)NHR
4. In one embodiment, R
5 is -C(O)O(C
1-C
10 alkyl).
[0162] In another embodiment, R
5 is -C(O)NH(C
1-C
10 alkyl), -C(O)N(C
1-C
10 alkyl)
2 or -C(O)NH-aryl.
[0163] In another embodiment, R
5 is -CH(NH
2)NH
2 or -CH(NH
2)NH(C
1-C
10 alkyl).
[0164] In one embodiment, C and D are
cis with respect to each other.
[0165] In another embodiment, C and D are
trans with respect to each other.
[0166] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ic) and a physiologically acceptable carrier or vehicle.
[0167] The invention further provides Purine Derivatives of Formula (Ic) that are in isolated
and purified form.
[0168] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (Ic) for the preparation of a medicament for treating or preventing a Condition,
in an animal in need thereof.
[0169] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ic) for the preparation of a medicament for reducing an animal's rate of
metabolism, in an animal in need thereof.
[0170] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ic) for the preparation of a medicament protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0171] The Purine Derivatives of Formula (Ic) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ic') or Formula (Ic"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ic).
[0172] A Purine Derivative of Formula (Ic') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ic") when group A of the Purine Derivative of Formula
(Ic') is the same as group A of the Purine Derivative of Formula (Ic") and when group
D of the Purine Derivative of Formula (Ic') is the same as group D of the Purine Derivative
of Formula (Ic").
[0173] A Purine Derivative of Formula (Ic") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ic') when group A of the Purine Derivatives of Formula
(Ic") is the same as group A of the Purine Derivative of Formula (Ic') and when group
D of the Purine Derivative of Formula (Ic") is the same as group D of the Purine Derivative
of Formula (Ic').
[0174] In one embodiment, the Purine Derivatives of Formula (Ic) have the formula (Ic'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Ic') are substantially
free of their corresponding enantiomer, represented by Formula (Ic").
[0175] In another embodiment, the Purine Derivatives of Formula (Ic) have the formula (Ic"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Ic") are substantially
free of their corresponding enantiomer, represented by Formula (Ic').
[0176] In one embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture of a
Purine Derivative of Formula (Ic') and a Purine Derivative of Formula (Ic") wherein
the amount of the Purine Derivative of Formula (Ic') exceeds the amount of the Purine
Derivative of Formula (Ic").
[0177] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture
of a Purine Derivative of Formula (Ic') and a Purine Derivative of Formula (Ic") wherein
the amount of the Purine Derivative of Formula (Ic") exceeds the amount of the Purine
Derivative of Formula (Ic').
[0178] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a racemic
mixture of a Purine Derivative of Formula (Ic') and a Purine Derivative of Formula
(Ic").
[0179] In another embodiment, the Purine Derivatives of Formula (Ic) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Icc') or (Icc"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ic).
[0180] A Purine Derivative of Formula (Icc') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Icc") when group A of the Purine Derivative of Formula
(Icc') is the same as group A of the Purine Derivative of Formula (Icc") and when
group D of the Purine Derivative of Formula (Icc') is the same as group D of the Purine
Derivative of Formula (Icc").
[0181] A Purine Derivative of Formula (Icc") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Icc') when group A of the Purine Derivative of Formula
(Icc") is the same as group A of the Purine Derivative of Formula (Icc') and when
group D of the Purine Derivative of Formula (Icc") is the same as group D of the Purine
Derivative of Formula (Icc').
[0182] In one embodiment, the Purine Derivatives of Formula (Ic) have the formula (Icc'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Icc') are substantially
free of their corresponding opposite enantiomer.
[0183] In another embodiment, the Purine Derivatives of Formula (Ic) have the formula (Icc"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Icc") are substantially
free of their corresponding opposite enantiomer.
[0184] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture
of a Purine Derivative of Formula (Icc') and a Purine Derivative of Formula (Icc")
wherein the amount of the Purine Derivative of Formula (Icc') exceeds the amount of
the Purine Derivative of Formula (Icc").
[0185] In a further embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture
of a Purine Derivative of Formula (Icc') and a Purine Derivative of Formula (Icc")
wherein the amount of the Purine Derivative of Formula (Icc") exceeds the amount of
the Purine Derivative of Formula (Icc').
[0186] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a racemic
mixture of a Purine Derivative of Formula (Icc') and a Purine Derivative of Formula
(Icc").
[0187] A Purine Derivative of Formula (Icc') is the corresponding other anomer of a Purine
Derivative of Formula (Ic') when group A of the Purine Derivative of Formula (Icc')
is the same as group A of the Purine Derivative of Formula (Ic') and when group D
of the Purine Derivative of Formula (Icc') is the same as group D of the Purine Derivative
of Formula (Ic').
[0188] A Purine Derivative of Formula (Ic') is the corresponding other anomer of a Purine
Derivative of Formula (Icc') when group A of the Purine Derivative of Formula (Ic')
is the same as group A of the Purine Derivative of Formula (Icc') and when group D
of the Purine Derivative of Formula (Ic') is the same as group D of the Purine Derivative
of Formula (Icc').
[0189] A Purine Derivative of Formula (Icc") is the corresponding other anomer of a Purine
Derivative of Formula (Ic") when group A of the Purine Derivative of Formula (Icc")
is the same as group A of the Purine Derivative of Formula (Ic") and when group D
of the Purine Derivative of Formula (Icc") is the same as group D of the Purine Derivative
of Formula (Ic").
[0190] A Purine Derivative of Formula (Ic") is the corresponding other anomer of a Purine
Derivative of Formula (Icc") when group A of the Purine Derivative of Formula (Ic")
is the same as group A of the Purine Derivative of Formula (Icc") and when group D
of the Purine Derivative of Formula (Ic") is the same as group D of the Purine Derivative
of Formula (Icc").
[0191] In one embodiment, the Purine Derivatives of Formula (Ic) have the formula (Icc'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Icc') are substantIclly
free of their corresponding other anomer.
[0192] In another embodiment, the Purine Derivatives of Formula (Ic) have the formula (Icc"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Icc") are substantially
free of their corresponding other anomer.
[0193] In one embodiment, the Purine Derivatives of Formula (Ic) have the formula (Ic'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Ic') are substantially
free of their corresponding other anomer.
[0194] In another embodiment, the Purine Derivatives of Formula (Ic) have the formula (Ic"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ic), and wherein the Purine Derivatives of Formula (Ic") are substantially
free of their corresponding other anomer.
[0195] In one embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture of a
Purine Derivative of Formula (Ic') and a Purine Derivative of Formula (Icc')
wherein the amount of the Purine Derivative of Formula (Ic') exceeds the amount of
the Purine Derivative of Formula (Icc').
[0196] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture
of a Purine Derivative of Formula (Ic') and a Purine Derivative of Formula (Icc')
wherein the amount of the Purine Derivative of Formula (Icc') exceeds the amount of
the Purine Derivative of Formula (Ic').
[0197] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a equal mixture
of a Purine Derivative of Formula (Ic') and a Purine Derivative of Formula (Icc').
[0198] In one embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture of a
Purine Derivative of Formula (Ic") and a Purine Derivative of Formula (Icc") wherein
the amount of the Purine Derivative of Formula (Ic") exceeds the amount of the Purine
Derivative of Formula (Icc").
[0199] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a mixture
of a Purine Derivative of Formula (Ic") and a Purine Derivative of Formula (Icc")
wherein the amount of the Purine Derivative of Formula (Icc") exceeds the amount of
the Purine Derivative of Formula (Ic").
[0200] In another embodiment, the Purine Derivatives of Formula (Ic) exist as a equal mixture
of a Purine Derivative of Formula (Ic") and a Purine Derivative of Formula (Icc").
5.2.4 THE PURINE DERIVATIVES OF FORMULA (Id)
[0201] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Id):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Id),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0202] In one embodiment, R
1 is -H.
[0203] In another embodiment, R
1 is -C
1-C
10 alkyl.
[0204] In one embodiment, R
1 is -aryl or -(CH
2)
n-aryl.
[0205] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0206] In a specific embodiment, R
1 is cyclopentyl.
[0207] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0208] In another embodiment, R
1 is -C
8-C
12 bicyclic cycloalkyl or -C
8-C
12 bicyclic cycloalkenyl.
[0209] In still another embodiment, R
1 is -(CH
2)
n-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
n-(C
3-C
8 monocyclic cycloalkenyl).
[0210] In another embodiment, R
1 is -3- to 7-membered monocyclic heterocycle or -8- to 12-membered bicyclic heterocycle.
[0211] In one embodiment, R
2 is -H.
[0212] In one embodiment, R
2 is -halo.
[0213] In a specific embodiment, R
2 is -Cl.
[0214] In another embodiment, R
2 is -CN.
[0215] In another embodiment, R
2 is -NHR
4, -OR
4 or -SR
4.
[0216] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
4 or - NHC(O)NHR
4.
[0217] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
4 or - NHNHC(O)NHR
4.
[0218] In yet another embodiment, R
2 is -NH-N=C(R
6)R
7.
[0219] In one embodiment, R
3 is -CH
2ONO.
[0220] In another embodiment, R
3 is -CH
2OSO
3H.
[0221] In one embodiment, C and D are
cis with respect to each other.
[0222] In another embodiment, C and D are
trans with respect to each other.
[0223] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Id) and a physiologically acceptable carrier or vehicle.
[0224] The invention further provides Purine Derivatives of Formula (Id) that are in isolated
and purified form.
[0225] The invention still further provides uses of effective amounts of Purine Derivatives
of formula (Id) for the preparation of a medicament for treating or preventing a Condition,
in an animal in need thereof.
[0226] The invention further provides uses of effective amounts of Purine Derivatives of
formula (Id) for the preparation of a medicament for reducing an animal's rate of
metabolism, in an animal in need thereof.
[0227] The invention further provides uses of effective amounts of Purine Derivatives of
formula (Id) for the preparation of a medicament protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0228] The Purine Derivatives of Formula (Id) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Id') or Formula (Id"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Id).
[0229] A Purine Derivative of Formula (Id') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Id") when group A of the Purine Derivative of Formula
(Id') is the same as group A of the Purine Derivative of Formula (Id") and when group
D of the Purine Derivative of Formula (Id') is the same as group D of the Purine Derivative
of Formula (Id").
[0230] A Purine Derivative of Formula (Id") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Id') when group A of the Purine Derivatives of Formula
(Id") is the same as group A of the Purine Derivative of Formula (Id') and when group
D of the Purine Derivative of Formula (Id") is the same as group D of the Purine Derivative
of Formula (Id').
[0231] In one embodiment, the Purine Derivatives of Formula (Id) have the formula (Id'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Id') are substantially
free of their corresponding enantiomer, represented by Formula (Id").
[0232] In another embodiment, the Purine Derivatives of Formula (Id) have the formula (Id"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Id") are substantially
free of their corresponding enantiomer, represented by Formula (Id').
[0233] In one embodiment, the Purine Derivatives of Formula (Id) exist as a mixture of a
Purine Derivative of Formula (Id') and a Purine Derivative of Formula (Id") wherein
the amount of the Purine Derivative of Formula (Id') exceeds the amount of the Purine
Derivative of Formula (Id").
[0234] In another embodiment, the Purine Derivatives of Formula (Id) exist as a mixture
of a Purine Derivative of Formula (Id') and a Purine Derivative of Formula (Id") wherein
the amount of the Purine Derivative of Formula (Id") exceeds the amount of the Purine
Derivative of Formula (Id').
[0235] In another embodiment, the Purine Derivatives of Formula (Id) exist as a racemic
mixture of a Purine Derivative of Formula (Id') and a Purine Derivative of Formula
(Id").
[0236] In another embodiment, the Purine Derivatives of Formula (Id) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Idd') or (Idd"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Id).
[0237] A Purine Derivative of Formula (Idd') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Idd") when group A of the Purine Derivative of Formula
(Idd') is the same as group A of the Purine Derivative of Formula (Idd") and when
group D of the Purine Derivative of Formula (Idd') is the same as group D of the Purine
Derivative of Formula (Idd").
[0238] A Purine Derivative of Formula (Idd") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Idd') when group A of the Purine Derivative of Formula
(Idd") is the same as group A of the Purine Derivative of Formula (Idd') and when
group D of the Purine Derivative of Formula (Idd") is the same as group D of the Purine
Derivative of Formula (Idd').
[0239] In one embodiment, the Purine Derivatives of Formula (Id) have the formula (Idd'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Idd') are substantially
free of their corresponding opposite enantiomer.
[0240] In another embodiment, the Purine Derivatives of Formula (Id) have the formula (Idd"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Idd") are substantially
free of their corresponding opposite enantiomer.
[0241] In another embodiment, the Purine Derivatives of Formula (Id) exist as a mixture
of a Purine Derivative of Formula (Idd') and a Purine Derivative of Formula (Idd")
wherein the amount of the Purine Derivative of Formula (Idd') exceeds the amount of
the Purine Derivative of Formula (Idd").
[0242] In a further embodiment, the Purine Derivatives of Formula (Id) exist as a mixture
of a Purine Derivative of Formula (Idd') and a Purine Derivative of Formula (Idd")
wherein the amount of the Purine Derivative of Formula (Idd") exceeds the amount of
the Purine Derivative of Formula (Idd').
[0243] In another embodiment, the Purine Derivatives of Formula (Id) exist as a racemic
mixture of a Purine Derivative of Formula (Idd') and a Purine Derivative of Formula
(Idd").
[0244] A Purine Derivative of Formula (Idd') is the corresponding other anomer of a Purine
Derivative of Formula (Id') when group A of the Purine Derivative of Formula (Idd')
is the same as group A of the Purine Derivative of Formula (Ib') and when group D
of the Purine Derivative of Formula (Idd') is the same as group D of the Purine Derivative
of Formula (Id').
[0245] A Purine Derivative of Formula (Id') is the corresponding other anomer of a Purine
Derivative of Formula (Idd') when group A of the Purine Derivative of Formula (Id')
is the same as group A of the Purine Derivative of Formula (Idd') and when group D
of the Purine Derivative of Formula (Id') is the same as group D of the Purine Derivative
of Formula (Idd').
[0246] A Purine Derivative of Formula (Idd") is the corresponding other anomer of a Purine
Derivative of Formula (Id") when group A of the Purine Derivative of Formula (Idd")
is the same as group A of the Purine Derivative of Formula (Id") and when group D
of the Purine Derivative of Formula (Idd") is the same as group D of the Purine Derivative
of Formula (Id").
[0247] A Purine Derivative of Formula (Id") is the corresponding other anomer of a Purine
Derivative of Formula (Idd") when group A of the Purine Derivative of Formula (Id")
is the same as group A of the Purine Derivative of Formula (Idd") and when group D
of the Purine Derivative of Formula (Id") is the same as group D of the Purine Derivative
of Formula (Idd").
[0248] In one embodiment, the Purine Derivatives of Formula (Id) have the formula (Idd'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Idd') are substantially
free of their corresponding other anomer.
[0249] In another embodiment, the Purine Derivatives of Formula (Id) have the formula (Idd"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Idd") are substantially
free of their corresponding other anomer.
[0250] In one embodiment, the Purine Derivatives of Formula (Id) have the formula (Id'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Id') are substantially
free of their corresponding other anomer.
[0251] In another embodiment, the Purine Derivatives of Formula (Id) have the formula (Id"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Id), and wherein the Purine Derivatives of Formula (Id") are substantially
free of their corresponding other anomer.
[0252] In one embodiment, the Purine Derivatives of Formula (Id) exist as a mixture of a
Purine Derivative of Formula (Id') and a Purine Derivative of Formula (Idd') wherein
the amount of the Purine Derivative of Formula (Id') exceeds the amount of the Purine
Derivative of Formula (Idd').
[0253] In another embodiment, the Purine Derivatives of Formula (Id) exist as a mixture
of a Purine Derivative of Formula (Id') and a Purine Derivative of Formula (Idd')
wherein the amount of the Purine Derivative of Formula (Idd') exceeds the amount of
the Purine Derivative of Formula (Id').
[0254] In another embodiment, the Purine Derivatives of Formula (Id) exist as a equal mixture
of a Purine Derivative of Formula (Id') and a Purine Derivative of Formula (Idd').
[0255] In one embodiment, the Purine Derivatives of Formula (Id) exist as a mixture of a
Purine Derivative of Formula (Id") and a Purine Derivative of Formula (Idd") wherein
the amount of the Purine Derivative of Formula (Id") exceeds the amount of the Purine
Derivative of Formula (Idd").
[0256] In another embodiment, the Purine Derivatives of Formula (Id) exist as a mixture
of a Purine Derivative of Formula (Id") and a Purine Derivative of Formula (Idd")
wherein the amount of the Purine Derivative of Formula (Idd") exceeds the amount of
the Purine Derivative of Formula (Id").
[0257] In another embodiment, the Purine Derivatives of Formula (Id) exist as a equal mixture
of a Purine Derivative of Formula (Id") and a Purine Derivative of Formula (Idd")
[0258] Illustrative Purine Derivatives of Formula (Id) include the compounds listed below:

and pharmaceutically acceptable salts thereof.
[0259] In one embodiment, compound
23 is in the form of its sodium salt.
[0260] In another embodiment, compound
24 is in the form of its sodium salt.
5.2.5 THE PURINE DERIVATIVES OF FORMULA (Ie)
[0261] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ie):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ie),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0262] In one embodiment, R
1 is -(CH
2)
n-aryl.
[0263] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0264] In a specific embodiment, R
1 is cyclopentyl.
[0265] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0266] In another embodiment, R
1 is -C
8-C
12 bicyclic cycloalkyl or -C
8-C
12 bicyclic cycloalkenyl.
[0267] In still another embodiment, R
1 is -(CH
2)
n-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
n-(C
3-C
8 monocyclic cycloalkenyl).
[0268] In another embodiment, R
1 is -3- to 7-membered monocyclic heterocycle or -8- to 12-membered bicyclic heterocycle.
[0269] In one embodiment, R
2 is -halo.
[0270] In a specific embodiment, R
2 is -Cl.
[0271] In another embodiment, R
2 is -CN.
[0272] In another embodiment, R
2 is NHR
4, -OR
4 or -SR
4.
[0273] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
4 or - NHC(O)NHR
4.
[0274] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
4 or - NHNHC(O)NHR
4.
[0275] In yet another embodiment, R
2 is -NH-N=C(R
6)R
7.
[0276] In one embodiment, C and D are
cis with respect to each other.
[0277] In another embodiment, C and D are
trans with respect to each other.
[0278] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ie) and a physiologically acceptable carrier or vehicle.
[0279] The invention further provides Purine Derivatives of Formula (Ie) that are in isolated
and purified form.
[0280] The invention still further provides uses of effective amounts of Purine Derivatives
of formula (Ie) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0281] The invention further provides uses of effective amounts of Purine Derivatives of
formula (Ie) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0282] The invention further provides uses of effective amounts of Purine Derivatives of
formula (Ie) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0283] The Purine Derivatives of Formula (Ie) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ie') or Formula (Ie"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ie).
[0284] A Purine Derivative of Formula (Ie') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ie") when group A of the Purine Derivative of Formula
(Ie') is the same as group A of the Purine Derivative of Formula (Ie") and when group
D of the Purine Derivative of Formula (Ie') is the same as group D of the Purine Derivative
of Formula (Ie").
[0285] A Purine Derivative of Formula (Ie") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ie') when group A of the Purine Derivatives of Formula
(Ie") is the same as group A of the Purine Derivative of Formula (Ie') and when group
D of the Purine Derivative of Formula (Ie") is the same as group D of the Purine Derivative
of Formula (Ie').
[0286] In one embodiment, the Purine Derivatives of Formula (Ie) have the formula (Ie'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Ie') are substantially
free of their corresponding enantiomer, represented by Formula (Ie").
[0287] In another embodiment, the Purine Derivatives of Formula (Ie) have the formula (Ie"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Ie") are substantially
free of their corresponding enantiomer, represented by Formula (Ie').
[0288] In one embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture of a
Purine Derivative of Formula (Ie') and a Purine Derivative of Formula (Ie") wherein
the amount of the Purine Derivative of Formula (Ie') exceeds the amount of the Purine
Derivative of Formula (Ie").
[0289] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture
of a Purine Derivative of Formula (Ie') and a Purine Derivative of Formula (Ie") wherein
the amount of the Purine Derivative of Formula (Ie") exceeds the amount of the Purine
Derivative of Formula (Ie').
[0290] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a racemic
mixture of a Purine Derivative of Formula (Ie') and a Purine Derivative of Formula
(Ie").
[0291] In another embodiment, the Purine Derivatives of Formula (Ie) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Iee') or (Iee"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ie).
[0292] A Purine Derivative of Formula (Iee') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iee") when group A of the Purine Derivative of Formula
(Iee') is the same as group A of the Purine Derivative of Formula (Iee") and when
group D of the Purine Derivative of Formula (Iee') is the same as group D of the Purine
Derivative of Formula (Iee").
[0293] A Purine Derivative of Formula (Iee") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iee') when group A of the Purine Derivative of Formula
(Iee") is the same as group A of the Purine Derivative of Formula (Iee') and when
group D of the Purine Derivative of Formula (Iee") is the same as group D of the Purine
Derivative of Formula (Iee').
[0294] In one embodiment, the Purine Derivatives of Formula (Ie) have the formula (Iee'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Iee') are substantially
free of their corresponding opposite enantiomer.
[0295] In another embodiment, the Purine Derivatives of Formula (Ie) have the formula (Iee"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Iee") are substantially
free of their corresponding opposite enantiomer.
[0296] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture
of a Purine Derivative of Formula (Iee') and a Purine Derivative of Formula (Iee")
wherein the amount of the Purine Derivative of Formula (Iee') exceeds the amount of
the Purine Derivative of Formula (Iee").
[0297] In a further embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture
of a Purine Derivative of Formula (Iee') and a Purine Derivative of Formula (Iee")
wherein the amount of the Purine Derivative of Formula (Iee") exceeds the amount of
the Purine Derivative of Formula (Iee').
[0298] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a racemic
mixture of a Purine Derivative of Formula (Iee') and a Purine Derivative of Formula
(Iee").
[0299] A Purine Derivative of Formula (Iee') is the corresponding other anomer of a Purine
Derivative of Formula (Ie') when group A of the Purine Derivative of Formula (Iee')
is the same as group A of the Purine Derivative of Formula (Ie') and when group D
of the Purine Derivative of Formula (Iee') is the same as group D of the Purine Derivative
of Formula (Ie').
[0300] A Purine Derivative of Formula (Ie') is the corresponding other anomer of a Purine
Derivative of Formula (Iee') when group A of the Purine Derivative of Formula (Ie')
is the same as group A of the Purine Derivative of Formula (Iee') and when group D
of the Purine Derivative of Formula (Ie') is the same as group D of the Purine Derivative
of Formula (Iee').
[0301] A Purine Derivative of Formula (Iee") is the corresponding other anomer of a Purine
Derivative of Formula (Ie") when group A of the Purine Derivative of Formula (Iee")
is the same as group A of the Purine Derivative of Formula (Ie") and when group D
of the Purine Derivative of Formula (Iee") is the same as group D of the Purine Derivative
of Formula (Ie").
[0302] A Purine Derivative of Formula (Ie") is the corresponding other anomer of a Purine
Derivative of Formula (Iee") when group A of the Purine Derivative of Formula (Ie")
is the same as group A of the Purine Derivative of Formula (Iee") and when group D
of the Purine Derivative of Formula (Ie") is the same as group D of the Purine Derivative
of Formula (Iee").
[0303] In one embodiment, the Purine Derivatives of Formula (Ie) have the formula (Iee'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Iee') are substantially
free of their corresponding other anomer.
[0304] In another embodiment, the Purine Derivatives of Formula (Ie) have the formula (Iee"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Iee") are substantially
free of their corresponding other anomer.
[0305] In one embodiment, the Purine Derivatives of Formula (Ie) have the formula (Ie'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Ie') are substantially
free of their corresponding other anomer.
[0306] In another embodiment, the Purine Derivatives of Formula (Ie) have the formula (Ie"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ie), and wherein the Purine Derivatives of Formula (Ie") are substantially
free of their corresponding other anomer.
[0307] In one embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture of a
Purine Derivative of Formula (Ie') and a Purine Derivative of Formula (Iee') wherein
the amount of the Purine Derivative of Formula (Ie') exceeds the amount of the Purine
Derivative of Formula (Iee').
[0308] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture
of a Purine Derivative of Formula (Ie') and a Purine Derivative of Formula (Iee')
wherein the amount of the Purine Derivative of Formula (Iee') exceeds the amount of
the Purine Derivative of Formula (Ie').
[0309] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a equal mixture
of a Purine Derivative of Formula (Ie') and a Purine Derivative of Formula (Iee').
[0310] In one embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture of a
Purine Derivative of Formula (Ie") and a Purine Derivative of Formula (Iee") wherein
the amount of the Purine Derivative of Formula (Ie") exceeds the amount of the Purine
Derivative of Formula (Iee").
[0311] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a mixture
of a Purine Derivative of Formula (Ie") and a Purine Derivative of Formula (Iee")
wherein the amount of the Purine Derivative of Formula (Iee") exceeds the amount of
the Purine Derivative of Formula (Ie").
[0312] In another embodiment, the Purine Derivatives of Formula (Ie) exist as a equal mixture
of a Purine Derivative of Formula (Ie") and a Purine Derivative of Formula (Iee").
5.2.6 THE PURINE DERIVATIVES OF FORMULA (If)
[0313] As stated above, the present invention encompasses Purine Derivatives having the
Formula (If):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (If),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0314] In one embodiment, R
1 is -C
5-C
6 monocyclic cycloalkyl.
[0315] In another embodiment, R
1 is cyclopentyl.
[0316] In one embodiment, R
2 is -H
[0317] In another embodiment R
2 is -halo.
[0318] In another embodiment, R
2 is -Cl.
[0319] In one embodiment, C and D are
cis with respect to each other.
[0320] In another embodiment, C and D are
trans with respect to each other.
[0321] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (If) and a physiologically acceptable carrier or vehicle.
[0322] The invention further provides Purine Derivatives of Formula (If) that are in isolated
and purified form.
[0323] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (If) for the preparation of medicaments for treating or preventing a Condition,
comprising administering an effective amount of a Purine Derivative of Formula (If)
to in an animal in need thereof.
[0324] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (If) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0325] The invention further provides methods protecting an animal's heart against myocardial
damage during cardioplegia, in an animal in need thereof.
[0326] The Purine Derivatives of Formula (If) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (If') or Formula (If"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (If).
[0327] A Purine Derivative of Formula (If') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (If") when group A of the Purine Derivative of Formula
(If) is the same as group A of the Purine Derivative of Formula (If") and when group
D of the Purine Derivative of Formula (If) is the same as group D of the Purine Derivative
of Formula (If").
[0328] A Purine Derivative of Formula (If") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (If) when group A of the Purine Derivatives of Formula
(If") is the same as group A of the Purine Derivative of Formula (If) and when group
D of the Purine Derivative of Formula (If") is the same as group D of the Purine Derivative
of Formula (If').
[0329] In one embodiment, the Purine Derivatives of Formula (If) have the formula (If'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (If) are substantially
free of their corresponding enantiomer, represented by Formula (If").
[0330] In another embodiment, the Purine Derivatives of Formula (If) have the formula (If"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (If") are substantially
free of their corresponding enantiomer, represented by Formula (If').
[0331] In one embodiment, the Purine Derivatives of Formula (If) exist as a mixture of a
Purine Derivative of Formula (If') and a Purine Derivative of Formula (If") wherein
the amount of the Purine Derivative of Formula (If') exceeds the amount of the Purine
Derivative of Formula (If").
[0332] In another embodiment, the Purine Derivatives of Formula (If) exist as a mixture
of a Purine Derivative of Formula (If) and a Purine Derivative of Formula (If") wherein
the amount of the Purine Derivative of Formula (If") exceeds the amount of the Purine
Derivative of Formula (If').
[0333] In another embodiment, the Purine Derivatives of Formula (If) exist as a racemic
mixture of a Purine Derivative of Formula (If') and a Purine Derivative of Formula
(If").
[0334] In another embodiment, the Purine Derivatives of Formula (If) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Iff") or (Iff"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (If).
[0335] A Purine Derivative of Formula (Iff") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iff") when group A of the Purine Derivative of Formula
(Iff") is the same as group A of the Purine Derivative of Formula (Iff") and when
group D of the Purine Derivative of Formula (Iff') is the same as group D of the Purine
Derivative of Formula (Iff").
[0336] A Purine Derivative of Formula (Iff") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Iff') when group A of the Purine Derivative of Formula
(Iff") is the same as group A of the Purine Derivative of Formula (Iff') and when
group D of the Purine Derivative of Formula (Iff") is the same as group D of the Purine
Derivative of Formula (Iff').
[0337] In one embodiment, the Purine Derivatives of Formula (If) have the formula (Iff),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (Iff') are substantially
free of their corresponding opposite enantiomer.
[0338] In another embodiment, the Purine Derivatives of Formula (If) have the formula (Iff"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (Iff") are substantially
free of their corresponding opposite enantiomer.
[0339] In another embodiment, the Purine Derivatives of Formula (If) exist as a mixture
of a Purine Derivative of Formula (Iff') and a Purine Derivative of Formula (Iff")
wherein the amount of the Purine Derivative of Formula (Iff') exceeds the amount of
the Purine Derivative of Formula (Iff").
[0340] In a further embodiment, the Purine Derivatives of Formula (If) exist as a mixture
of a Purine Derivative of Formula (Iff') and a Purine Derivative of Formula (Iff")
wherein the amount of the Purine Derivative of Formula (Iff") exceeds the amount of
the Purine Derivative of Formula (Iff).
[0341] In another embodiment, the Purine Derivatives of Formula (If) exist as a racemic
mixture of a Purine Derivative of Formula (Iff') and a Purine Derivative of Formula
(Iff").
[0342] A Purine Derivative of Formula (Iff') is the corresponding other anomer of a Purine
Derivative of Formula (If') when group A of the Purine Derivative of Formula (Iff')
is the same as group A of the Purine Derivative of Formula (If') and when group D
of the Purine Derivative of Formula (Iff') is the same as group D of the Purine Derivative
of Formula (If').
[0343] A Purine Derivative of Formula (If') is the corresponding other anomer of a Purine
Derivative of Formula (Iff') when group A of the Purine Derivative of Formula (If')
is the same as group A of the Purine Derivative of Formula (Iff') and when group D
of the Purine Derivative of Formula (If') is the same as group D of the Purine Derivative
of Formula (Iff).
[0344] A Purine Derivative of Formula (Iff") is the corresponding other anomer of a Purine
Derivative of Formula (If") when group A of the Purine Derivative of Formula (Iff")
is the same as group A of the Purine Derivative of Formula (If") and when group D
of the Purine Derivative of Formula (Iff") is the same as group D of the Purine Derivative
of Formula (If").
[0345] A Purine Derivative of Formula (If") is the corresponding other anomer of a Purine
Derivative of Formula (Iff") when group A of the Purine Derivative of Formula (If")
is the same as group A of the Purine Derivative of Formula (Iff") and when group D
of the Purine Derivative of Formula (If") is the same as group D of the Purine Derivative
of Formula (Iff").
[0346] In one embodiment, the Purine Derivatives of Formula (If) have the formula (Iff),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (Iff') are substantially
free of their corresponding other anomer.
[0347] In another embodiment, the Purine Derivatives of Formula (If) have the formula (Iff"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (Iff") are substantially
free of their corresponding other anomer.
[0348] In one embodiment, the Purine Derivatives of Formula (If) have the formula (If'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (If') are substantially
free of their corresponding other anomer.
[0349] In another embodiment, the Purine Derivatives of Formula (If) have the formula (If"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (If), and wherein the Purine Derivatives of Formula (If") are substantially
free of their corresponding other anomer.
[0350] In one embodiment, the Purine Derivatives of Formula (If) exist as a mixture of a
Purine Derivative of Formula (If') and a Purine Derivative of Formula (Iff') wherein
the amount of the Purine Derivative of Formula (If') exceeds the amount of the Purine
Derivative of Formula (Iff').
[0351] In another embodiment, the Purine Derivatives of Formula (If) exist as a mixture
of a Purine Derivative of Formula (If) and a Purine Derivative of Formula (Iff') wherein
the amount of the Purine Derivative of Formula (Iff') exceeds the amount of the Purine
Derivative of Formula (If').
[0352] In another embodiment, the Purine Derivatives of Formula (If') exist as a equal mixture
of a Purine Derivative of Formula (If') and a Purine Derivative of Formula (Iff').
[0353] In one embodiment, the Purine Derivatives of Formula (If) exist as a mixture of a
Purine Derivative of Formula (If") and a Purine Derivative of Formula (Iff") wherein
the amount of the Purine Derivative of Formula (If") exceeds the amount of the Purine
Derivative of Formula (Iff").
[0354] In another embodiment, the Purine Derivatives of Formula (If) exist as a mixture
of a Purine Derivative of Formula (If") and a Purine Derivative of Formula (Iff")
wherein the amount of the Purine Derivative of Formula (Iff") exceeds the amount of
the Purine Derivative of Formula (If").
[0355] In another embodiment, the Purine Derivatives of Formula (If) exist as a equal mixture
of a Purine Derivative of Formula (If") and a Purine Derivative of Formula (Iff").
[0356] Illustrative Purine Derivatives of Formula (If) include the compounds listed below:

and pharmaceutically acceptable salts thereof.
5.2.7 THE PURINE DERIVATIVES OF FORMULA (Ig)
[0357] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ig):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ig),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0358] In one embodiment, R
2 is -H
[0359] In another embodiment R
2 is -halo.
[0360] In a specific embodiment, R
2 is -Cl.
[0361] In one embodiment, C and D are
cis with respect to each other.
[0362] In another embodiment, C and D are
trans with respect to each other.
[0363] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ig) and a physiologically acceptable carrier or vehicle.
[0364] The invention further provides Purine Derivatives of Formula (Ig) that are in isolated
and purified form.
[0365] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (Ig) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0366] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ig) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0367] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ig) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0368] The Purine Derivatives of Formula (Ig) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ig') or Formula (Ig"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ig).
[0369] A Purine Derivative of Formula (Ig') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ig") when group A of the Purine Derivative of Formula
(Ig') is the same as group A of the Purine Derivative of Formula (Ig") and when group
D of the Purine Derivative of Formula (Ig') is the same as group D of the Purine Derivative
of Formula (Ig").
[0370] A Purine Derivative of Formula (Ig") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ig') when group A of the Purine Derivatives of Formula
(Ig") is the same as group A of the Purine Derivative of Formula (Ig') and when group
D of the Purine Derivative of Formula (Ig") is the same as group D of the Purine Derivative
of Formula (Ig').
[0371] In one embodiment, the Purine Derivatives of Formula (Ig) have the formula (Ig'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Ig') are substantially
free of their corresponding enantiomer, represented by Formula (Ig").
[0372] In another embodiment, the Purine Derivatives of Formula (Ig) have the formula (Ig"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Ig") are substantially
free of their corresponding enantiomer, represented by Formula (Ig').
[0373] In one embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture of a
Purine Derivative of Formula (Ig') and a Purine Derivative of Formula (Ig") wherein
the amount of the Purine Derivative of Formula (Ig') exceeds the amount of the Purine
Derivative of Formula (Ig").
[0374] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture
of a Purine Derivative of Formula (Ig') and a Purine Derivative of Formula (Ig") wherein
the amount of the Purine Derivative of Formula (Ig") exceeds the amount of the Purine
Derivative of Formula (Ig').
[0375] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a racemic
mixture of a Purine Derivative of Formula (Ig') and a Purine Derivative of Formula
(Ig").
[0376] In another embodiment, the Purine Derivatives of Formula (Ig) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Igg') or (Igg"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ig).
[0377] A Purine Derivative of Formula (Igg') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Igg") when group A of the Purine Derivative of Formula
(Igg') is the same as group A of the Purine Derivative of Formula (Igg") and when
group D of the Purine Derivative of Formula (Igg') is the same as group D of the Purine
Derivative of Formula (Igg").
[0378] A Purine Derivative of Formula (Igg") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Igg') when group A of the Purine Derivative of Formula
(Igg") is the same as group A of the Purine Derivative of Formula (Igg') and when
group D of the Purine Derivative of Formula (Igg") is the same as group D of the Purine
Derivative of Formula (Igg').
[0379] In one embodiment, the Purine Derivatives of Formula (Ig) have the formula (Igg'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Igg') are substantially
free of their corresponding opposite enantiomer.
[0380] In another embodiment, the Purine Derivatives of Formula (Ig) have the formula (Igg"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Igg") are substantially
free of their corresponding opposite enantiomer.
[0381] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture
of a Purine Derivative of Formula (Igg') and a Purine Derivative of Formula (Igg")
wherein the amount of the Purine Derivative of Formula (Igg') exceeds the amount of
the Purine Derivative of Formula (Igg").
[0382] In a further embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture
of a Purine Derivative of Formula (Igg') and a Purine Derivative of Formula (Igg")
wherein the amount of the Purine Derivative of Formula (Igg") exceeds the amount of
the Purine Derivative of Formula (Igg').
[0383] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a racemic
mixture of a Purine Derivative of Formula (Igg') and a Purine Derivative of Formula
(Igg").
[0384] A Purine Derivative of Formula (Igg') is the corresponding other anomer of a Purine
Derivative of Formula (Ig') when group A of the Purine Derivative of Formula (Igg')
is the same as group A of the Purine Derivative of Formula (Ig') and when group D
of the Purine Derivative of Formula (Igg') is the same as group D of the Purine Derivative
of Formula (Ig').
[0385] A Purine Derivative of Formula (Ig') is the corresponding other anomer of a Purine
Derivative of Formula (Igg') when group A of the Purine Derivative of Formula (Ig')
is the same as group A of the Purine Derivative of Formula (Igg') and when group D
of the Purine Derivative of Formula (Ig') is the same as group D of the Purine Derivative
of Formula (Igg').
[0386] A Purine Derivative of Formula (Igg") is the corresponding other anomer of a Purine
Derivative of Formula (Ig") when group A of the Purine Derivative of Formula (Igg")
is the same as group A of the Purine Derivative of Formula (Ig") and when group D
of the Purine Derivative of Formula (Igg") is the same as group D of the Purine Derivative
of Formula (Ig").
[0387] A Purine Derivative of Formula (Ig") is the corresponding other anomer of a Purine
Derivative of Formula (Igg") when group A of the Purine Derivative of Formula (Ig")
is the same as group A of the Purine Derivative of Formula (Igg") and when group D
of the Purine Derivative of Formula (Ig") is the same as group D of the Purine Derivative
of Formula (Igg").
[0388] In one embodiment, the Purine Derivatives of Formula (Ig) have the formula (Igg'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Igg') are substantially
free of their corresponding other anomer.
[0389] In another embodiment, the Purine Derivatives of Formula (Ig) have the formula (Igg"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Igg") are substantially
free of their corresponding other anomer.
[0390] In one embodiment, the Purine Derivatives of Formula (Ig) have the formula (Ig'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Ig') are substantially
free of their corresponding other anomer.
[0391] In another embodiment, the Purine Derivatives of Formula (Ig) have the formula (Ig"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ig), and wherein the Purine Derivatives of Formula (Ig") are substantially
free of their corresponding other anomer.
[0392] In one embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture of a
Purine Derivative of Formula (Ig') and a Purine Derivative of Formula (Igg') wherein
the amount of the Purine Derivative of Formula (Ig') exceeds the amount of the Purine
Derivative of Formula (Igg').
[0393] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture
of a Purine Derivative of Formula (Ig') and a Purine Derivative of Formula (Igg')
wherein the amount of the Purine Derivative of Formula (Igg') exceeds the amount of
the Purine Derivative of Formula (Ig').
[0394] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a equal mixture
of a Purine Derivative of Formula (Ig') and a Purine Derivative of Formula (Igg').
[0395] In one embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture of a
Purine Derivative of Formula (Ig") and a Purine Derivative of Formula (Igg") wherein
the amount of the Purine Derivative of Formula (Ig") exceeds the amount of the Purine
Derivative of Formula (Igg").
[0396] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a mixture
of a Purine Derivative of Formula (Ig") and a Purine Derivative of Formula (Igg")
wherein the amount of the Purine Derivative of Formula (Igg") exceeds the amount of
the Purine Derivative of Formula (Ig").
[0397] In another embodiment, the Purine Derivatives of Formula (Ig) exist as a equal mixture
of a Purine Derivative of Formula (Ig") and a Purine Derivative of Formula (Igg").
[0398] Illustrative Purine Derivatives of Formula (Ig) include the compounds listed below:

and pharmaceutically acceptable salts thereof.
5.2.8 THE PURINE DERIVATIVES OF FORMULA (Ih)
[0399] As stated above, the present invention encompasses Purine Derivatives having the
Formula (Ih):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ih),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0400] In one embodiment, R
1 is cyclopent-1-ol-2-yl.
[0401] In another embodiment R
1 is cyclopent-1-ol-3-yl.
[0402] In one embodiment, C and D are
cis with respect to each other.
[0403] In another embodiment, C and D are
trans with respect to each other.
[0404] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (Ih) and a physiologically acceptable carrier or vehicle.
[0405] The invention further provides Purine Derivatives of Formula (Ih) that are in isolated
and purified form.
[0406] Condition, The invention still further provides uses of effective amounts of Purine
Derivatives of Formula (Ih) for the preparation of medicaments for treating or preventing
a Condition, in an animal in need thereof.
[0407] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ih) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0408] The invention further provides uses of effective amounts of Purine Derivatives of
Formula (Ih) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0409] The Purine Derivatives of Formula (Ih) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (Ih') or Formula (Ih"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ih).
[0410] A Purine Derivative of Formula (Ih') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ih") when group A of the Purine Derivative of Formula
(Ih') is the same as group A of the Purine Derivative of Formula (Ih") and when group
D of the Purine Derivative of Formula (Ih') is the same as group D of the Purine Derivative
of Formula (Ih").
[0411] A Purine Derivative of Formula (Ih") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ih') when group A of the Purine Derivatives of Formula
(Ih") is the same as group A of the Purine Derivative of Formula (Ih') and when group
D of the Purine Derivative of Formula (Ih") is the same as group D of the Purine Derivative
of Formula (Ih').
[0412] In one embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ih'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ih') are substantially
free of their corresponding enantiomer, represented by Formula (Ih").
[0413] In another embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ih"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ih") are substantially
free of their corresponding enantiomer, represented by Formula (Ih').
[0414] In one embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture of a
Purine Derivative of Formula (Ih') and a Purine Derivative of Formula (Ih") wherein
the amount of the Purine Derivative of Formula (Ih') exceeds the amount of the Purine
Derivative of Formula (Ih").
[0415] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture
of a Purine Derivative of Formula (Ih') and a Purine Derivative of Formula (Ih") wherein
the amount of the Purine Derivative of Formula (Ih") exceeds the amount of the Purine
Derivative of Formula (Ih').
[0416] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a racemic
mixture of a Purine Derivative of Formula (Ih') and a Purine Derivative of Formula
(Ih").
[0417] In another embodiment, the Purine Derivatives of Formula (Ih) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Ihh') or (Ihh"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (Ih).
[0418] A Purine Derivative of Formula (Ihh') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ihh") when group A of the Purine Derivative of Formula
(Ihh') is the same as group A of the Purine Derivative of Formula (Ihh") and when
group D of the Purine Derivative of Formula (Ihh') is the same as group D of the Purine
Derivative of Formula (Ihh").
[0419] A Purine Derivative of Formula (Ihh") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Ihh') when group A of the Purine Derivative of Formula
(Ihh") is the same as group A of the Purine Derivative of Formula (Ihh') and when
group D of the Purine Derivative of Formula (Ihh") is the same as group D of the Purine
Derivative of Formula (Ihh').
[0420] In one embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ihh'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ihh') are substantially
free of their corresponding opposite enantiomer.
[0421] In another embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ihh"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ihh") are substantially
free of their corresponding opposite enantiomer.
[0422] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture
of a Purine Derivative of Formula (Ihh') and a Purine Derivative of Formula (Ihh")
wherein the amount of the Purine Derivative of Formula (Ihh') exceeds the amount of
the Purine Derivative of Formula (Ihh").
[0423] In a further embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture
of a Purine Derivative of Formula (Ihh') and a Purine Derivative of Formula (Ihh")
wherein the amount of the Purine Derivative of Formula (Ihh") exceeds the amount of
the Purine Derivative of Formula (Ihh').
[0424] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a racemic
mixture of a Purine Derivative of Formula (Ihh') and a Purine Derivative of Formula
(Ihh").
[0425] A Purine Derivative of Formula (Ihh') is the corresponding other anomer of a Purine
Derivative of Formula (Ih') when group A of the Purine Derivative of Formula (Ihh')
is the same as group A of the Purine Derivative of Formula (Ih') and when group D
of the Purine Derivative of Formula (Ihh') is the same as group D of the Purine Derivative
of Formula (Ih').
[0426] A Purine Derivative of Formula (Ih') is the corresponding other anomer of a Purine
Derivative of Formula (Ihh') when group A of the Purine Derivative of Formula (Ih')
is the same as group A of the Purine Derivative of Formula (Ihh') and when group D
of the Purine Derivative of Formula (Ih') is the same as group D of the Purine Derivative
of Formula (Ihh').
[0427] A Purine Derivative of Formula (Ihh") is the corresponding other anomer of a Purine
Derivative of Formula (Ih") when group A of the Purine Derivative of Formula (Ihh")
is the same as group A of the Purine Derivative of Formula (Th") and when group D
of the Purine Derivative of Formula (Ihh") is the same as group D of the Purine Derivative
of Formula (Ih").
[0428] A Purine Derivative of Formula (Ih") is the corresponding other anomer of a Purine
Derivative of Formula (Ihh") when group A of the Purine Derivative of Formula (Ih")
is the same as group A of the Purine Derivative of Formula (Ihh") and when group D
of the Purine Derivative of Formula (Ih") is the same as group D of the Purine Derivative
of Formula (Ihh").
[0429] In one embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ihh'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ihh') are substantially
free of their corresponding other anomer.
[0430] In another embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ihh"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ihh") are substantially
free of their corresponding other anomer.
[0431] In one embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ih'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ih') are substantially
free of their corresponding other anomer.
[0432] In another embodiment, the Purine Derivatives of Formula (Ih) have the formula (Ih"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (Ih), and wherein the Purine Derivatives of Formula (Ih") are substantially
free of their corresponding other anomer.
[0433] In one embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture of a
Purine Derivative of Formula (Ih') and a Purine Derivative of Formula (Ihh') wherein
the amount of the Purine Derivative of Formula (Ih') exceeds the amount of the Purine
Derivative of Formula (Ihh').
[0434] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture
of a Purine Derivative of Formula (Ih') and a Purine Derivative of Formula (Ihh')
wherein the amount of the Purine Derivative of Formula (Ihh') exceeds the amount of
the Purine Derivative of Formula (Ih').
[0435] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a equal mixture
of a Purine Derivative of Formula (Ih') and a Purine Derivative of Formula (Ihh').
[0436] In one embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture of a
Purine Derivative of Formula (Ih") and a Purine Derivative of Formula (Ihh") wherein
the amount of the Purine Derivative of Formula (Ih") exceeds the amount of the Purine
Derivative of Formula (Ihh").
[0437] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a mixture
of a Purine Derivative of Formula (Ih") and a Purine Derivative of Formula (Ihh")
wherein the amount of the Purine Derivative of Formula (Ihh") exceeds the amount of
the Purine Derivative of Formula (Ih").
[0438] In another embodiment, the Purine Derivatives of Formula (Ih) exist as a equal mixture
of a Purine Derivative of Formula (Ih") and a Purine Derivative of Formula (Ihh").
[0439] Illustrative Purine Derivatives of Formula (Ih) include the compounds listed below:

and pharmaceutically acceptable salts thereof.
5.2.9 THE PURINE DERIVATIVES OF FORMULA (II)
[0440] As stated above, the present invention encompasses Purine Derivatives having the
Formula (II):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (II),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0441] In one embodiment, R
1 is -H.
[0442] In another embodiment, R
1 is -C
1-C
10 alkyl.
[0443] In still another embodiment, R
1 is -(CH
2)
m-(C
8-C
12 bicyclic cycloalkyl) or -(CH
2)
m-(C
8-C
12 bicyclic cycloalkenyl).
[0444] In another embodiment, R
2 is -OR
4 or -SR
4.
[0445] In another embodiment, R
2 is -NHNHC(O)R
3, -NHNHC(O)OR
7 or - NHNHC(O)NHR
3.
[0446] In yet another embodiment, R
2 is -NH-N=C(R
5)R
6.
[0447] In a specific embodiment, R
2 is -NH-N=CH-cyclopropyl.
[0448] In one embodiment, C and D are
cis with respect to each other.
[0449] In another embodiment, C and D are
trans with respect to each other.
[0450] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (II) and a physiologically acceptable carrier or vehicle.
[0451] The invention further provides Purine Derivatives of Formula (II) that are in isolated
and purified form.
[0452] The invention still further provides uses of effective amounts of Purine Derivatives
of formula (II) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0453] The invention further provides uses of effective amounts of Purine Derivatives of
formula (II) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0454] The invention further provides uses of effective amounts of Purine Derivatives of
formula (II) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0455] The Purine Derivatives of Formula (II) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (II') or Formula (II"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (II).
[0456] A Purine Derivative of Formula (II') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (II") when group A of the Purine Derivative of Formula
(II') is the same as group A of the Purine Derivative of Formula (II") and when group
D of the Purine Derivative of Formula (II') is the same as group D of the Purine Derivative
of Formula (II").
[0457] A Purine Derivative of Formula (II") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (II') when group A of the Purine Derivatives of Formula
(II") is the same as group A of the Purine Derivative of Formula (II') and when group
D of the Purine Derivative of Formula (II") is the same as group D of the Purine Derivative
of Formula (II').
[0458] In one embodiment, the Purine Derivatives of Formula (II) have the formula (II'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (II') are substantially
free of their corresponding enantiomer, represented by Formula (II").
[0459] In another embodiment, the Purine Derivatives of Formula (II) have the formula (II"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (II") are substantially
free of their corresponding enantiomer, represented by Formula (II').
[0460] In one embodiment, the Purine Derivatives of Formula (II) exist as a mixture of a
Purine Derivative of Formula (II') and a Purine Derivative of Formula (II") wherein
the amount of the Purine Derivative of Formula (II') exceeds the amount of the Purine
Derivative of Formula (II").
[0461] In another embodiment, the Purine Derivatives of Formula (II) exist as a mixture
of a Purine Derivative of Formula (II') and a Purine Derivative of Formula (II") wherein
the amount of the Purine Derivative of Formula (II") exceeds the amount of the Purine
Derivative of Formula (II').
[0462] In another embodiment, the Purine Derivatives of Formula (II) exist as a racemic
mixture of a Purine Derivative of Formula (II') and a Purine Derivative of Formula
(II").
[0463] In another embodiment, the Purine Derivatives of Formula (II) can exist in the form
of a single enantiomer, for example, that depicted by either formula (IIa') or (IIa"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (II).
[0464] A Purine Derivative of Formula (IIa') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IIa") when group A of the Purine Derivative of Formula
(IIa') is the same as group A of the Purine Derivative of Formula (IIa") and when
group D of the Purine Derivative of Formula (IIa') is the same as group D of the Purine
Derivative of Formula (IIa").
[0465] A Purine Derivative of Formula (IIa") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IIa') when group A of the Purine Derivative of Formula
(IIa") is the same as group A of the Purine Derivative of Formula (IIa') and when
group D of the Purine Derivative of Formula (IIa") is the same as group D of the Purine
Derivative of Formula (IIa').
[0466] In one embodiment, the Purine Derivatives of Formula (II) have the formula (IIa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (IIa') are substantially
free of their corresponding opposite enantiomer.
[0467] In another embodiment, the Purine Derivatives of Formula (II) have the formula (IIa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (IIa") are substantially
free of their corresponding opposite enantiomer.
[0468] In another embodiment, the Purine Derivatives of Formula (II) exist as a mixture
of a Purine Derivative of Formula (IIa') and a Purine Derivative of Formula (IIa")
wherein the amount of the Purine Derivative of Formula (IIa') exceeds the amount of
the Purine Derivative of Formula (IIa").
[0469] In a further embodiment, the Purine Derivatives of Formula (II) exist as a mixture
of a Purine Derivative of Formula (IIa') and a Purine Derivative of Formula (IIa")
wherein the amount of the Purine Derivative of Formula (IIa") exceeds the amount of
the Purine Derivative of Formula (IIa').
[0470] In another embodiment, the Purine Derivatives of Formula (II) exist as a racemic
mixture of a Purine Derivative of Formula (IIa') and a Purine Derivative of Formula
(IIa").
[0471] A Purine Derivative of Formula (IIa') is the corresponding other anomer of a Purine
Derivative of Formula (II') when group A of the Purine Derivative of Formula (IIa')
is the same as group A of the Purine Derivative of Formula (II') and when group D
of the Purine Derivative of Formula (IIa') is the same as group D of the Purine Derivative
of Formula (II').
[0472] A Purine Derivative of Formula (II') is the corresponding other anomer of a Purine
Derivative of Formula (IIa') when group A of the Purine Derivative of Formula (II')
is the same as group A of the Purine Derivative of Formula (IIa') and when group D
of the Purine Derivative of Formula (II') is the same as group D of the Purine Derivative
of Formula (IIa').
[0473] A Purine Derivative of Formula (IIa") is the corresponding other anomer of a Purine
Derivative of Formula (II") when group A of the Purine Derivative of Formula (IIa")
is the same as group A of the Purine Derivative of Formula (II") and when group D
of the Purine Derivative of Formula (IIa") is the same as group D of the Purine Derivative
of Formula (II").
[0474] A Purine Derivative of Formula (II") is the corresponding other anomer of a Purine
Derivative of Formula (IIa") when group A of the Purine Derivative of Formula (II")
is the same as group A of the Purine Derivative of Formula (IIa") and when group D
of the Purine Derivative of Formula (II") is the same as group D of the Purine Derivative
of Formula (IIa").
[0475] In one embodiment, the Purine Derivatives of Formula (II) have the formula (IIa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (IIa') are substantially
free of their corresponding other anomer.
[0476] In another embodiment, the Purine Derivatives of Formula (II) have the formula (IIa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (IIa") are substantially
free of their corresponding other anomer.
[0477] In one embodiment, the Purine Derivatives of Formula (II) have the formula (II'),
depicted above, wherein A; B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (II') are substantially
free of their corresponding other anomer.
[0478] In another embodiment, the Purine Derivatives of Formula (II) have the formula (II"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (II), and wherein the Purine Derivatives of Formula (II") are substantially
free of their corresponding other anomer.
[0479] In one embodiment, the Purine Derivatives of Formula (II) exist as a mixture of a
Purine Derivative of Formula (II') and a Purine Derivative of Formula (IIa') wherein
the amount of the Purine Derivative of Formula (II') exceeds the amount of the Purine
Derivative of Formula (IIa')
[0480] In another embodiment, the Purine Derivatives of Formula (II) exist as a mixture
of a Purine Derivative of Formula (II') and a Purine Derivative of Formula (IIa')
wherein the amount of the Purine Derivative of Formula (IIa') exceeds the amount of
the Purine Derivative of Formula (II').
[0481] In another embodiment, the Purine Derivatives of Formula (IIa) exist as a equal mixture
of a Purine Derivative of Formula (II') and a Purine Derivative of Formula (IIa').
[0482] In one embodiment, the Purine Derivatives of Formula (IIa) exist as a mixture of
a Purine Derivative of Formula (II") and a Purine Derivative of Formula (IIa") wherein
the amount of the Purine Derivative of Formula (II") exceeds the amount of the Purine
Derivative of Formula (IIa").
[0483] In another embodiment, the Purine Derivatives of Formula (IIa) exist as a mixture
of a Purine Derivative of Formula (II") and a Purine Derivative of Formula (IIa")
wherein the amount of the Purine Derivative of Formula (IIa") exceeds the amount of
the Purine Derivative of Formula (II").
[0484] In another embodiment, the Purine Derivatives of Formula (IIa) exist as a equal mixture
of a Purine Derivative of Formula (II") and a Purine Derivative of Formula (IIa").
[0485] A first subclass of the Purine Derivatives of Formula (II) is that wherein one occurrence
of R
1 is -H.
[0486] A second subclass of the Purine Derivatives of Formula (II) is that wherein both
R
1 groups together with the carbon atom to which they are attached, join to form a -C
3-C
8 monocyclic cycloalkyl.
[0487] A third subclass of the Purine Derivatives of Formula (II) is that wherein R
2 is -NH-N=C(R
5)R
6.
5.2.10 THE PURINE DERIVATIVES OF FORMULA (III)
[0488] As stated above, the present invention encompasses Purine Derivatives having the
Formula (III):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (III),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0489] In one embodiment, R
1 is -H.
[0490] In another embodiment, R
1 is -C
1-C
10 alkyl.
[0491] In another embodiment, R
1 is -(CH
2)
m-(3- to 7-membered monocyclic heterocycle) or -(CH
2)
m-(8- to 12-membered bicyclic heterocycle).
[0492] In still another embodiment, R
1 is -(CH
2)
m-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
m-(C
3-C
8 monocyclic cycloalkenyl),
[0493] In a further embodiment, R
1 is -(CH
2)
m-(C
8-C
12 bicyclic cycloalkyl) or - (CH
2)
n-(C
8-C
12 bicyclic cycloalkenyl).
[0494] In another embodiment, R
1 is -(CH
2)
m-aryl.
[0495] In still another embodiment, two R
1 groups, together with the carbon atom to which they are attached, form a -C
3-C
8 monocyclic cycloalkyl, a -C
3-C
8 monocyclic cycloalkenyl, a -C
8-C
12 bicyclic cycloalkyl, or a -C
8-C
12 bicyclic cycloalkenyl.
[0496] In a specific embodiment, R
1 is cyclopentyl.
[0497] In one embodiment, m is 0.
[0498] In another embodiment, m is 1.
[0499] In another embodiment, m is 2.
[0500] In still another embodiment, m is 3.
[0501] In one embodiment, R
2 is -halo.
[0502] In a specific embodiment, R
2 is -Cl.
[0503] In one embodiment, R
2 is -H.
[0504] In another embodiment, R
2 is -CN.
[0505] In another embodiment, R
2 is -N(R
4)
2, -OR
4 or -SR
4.
[0506] In a further embodiment, R
2 is -NHC(O)R
4, -NHC(O)OR
4 or - NHC(O)NHR
4.
[0507] In another embodiment, R
2 is -NHNHC(O)R
4, -NHNHC(O)OR
4 or - NHNHC(O)NHR
4. In yet another embodiment, R
2 is -NH-N=C(R
6)R
7.
[0508] In a specific embodiment, R
2 is -NH-N=CH-cyclopropyl.
[0509] In one embodiment, R
3 is -ONO
2 or -ONO.
[0510] In another embodiment, R
3 is -OSO
3H, -OSO
2NH
2, -OSO
2NH(C
1-C
10 alkyl), -OSO
2N(C
1-C
10 alkyl)
2 or -OSO
2NH-aryl.
[0511] In another embodiment, R
3 is -N(R
5)
2.
[0512] In one embodiment, C and D are
cis with respect to each other.
[0513] In another embodiment, C and D are
trans with respect to each other.
[0514] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (III) and a physiologically acceptable carrier or vehicle.
[0515] The invention further provides Purine Derivatives of Formula (III) that are in isolated
and purified form.
[0516] The invention still further provides uses of effective amounts of Purine Derivatives
of formula (III) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0517] The invention further provides uses of effective amounts of Purine Derivatives of
formula (III) for the preparation of medicaments for reducing an animal's rate of
metabolism, in an animal in need thereof.
[0518] The invention further provides uses of effective amounts of Purine Derivatives of
formula (III) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0519] The Purine Derivatives of Formula (III) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (III') or Formula (III"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (III).
[0520] A Purine Derivative of Formula (III') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (III") when group A of the Purine Derivative of Formula
(III') is the same as group A of the Purine Derivative of Formula (III") and when
group D of the Purine Derivative of Formula (III') is the same as group D of the Purine
Derivative of Formula (III").
[0521] A Purine Derivative of Formula (III") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (III') when group A of the Purine Derivatives of Formula
(III") is the same as group A of the Purine Derivative of Formula (III') and when
group D of the Purine Derivative of Formula (III") is the same as group D of the Purine
Derivative of Formula (III').
[0522] In one embodiment, the Purine Derivatives of Formula (III) have the formula (III'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (III') are substantially
free of their corresponding enantiomer, represented by Formula (III").
[0523] In another embodiment, the Purine Derivatives of Formula (III) have the formula (III"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (III") are substantially
free of their corresponding enantiomer, represented by Formula (III').
[0524] In one embodiment, the Purine Derivatives of Formula (III) exist as a mixture of
a Purine Derivative of Formula (III') and a Purine Derivative of Formula (III") wherein
the amount of the Purine Derivative of Formula (III') exceeds the amount of the Purine
Derivative of Formula (III").
[0525] In another embodiment, the Purine Derivatives of Formula (III) exist as a mixture
of a Purine Derivative of Formula (III') and a Purine Derivative of Formula (III")
wherein the amount of the Purine Derivative of Formula (III") exceeds the amount of
the Purine Derivative of Formula (III').
[0526] In another embodiment, the Purine Derivatives of Formula (III) exist as a racemic
mixture of a Purine Derivative of Formula (III') and a Purine Derivative of Formula
(III").
[0527] In another embodiment, the Purine Derivatives of Formula (III) can exist in the form
of a single enantiomer, for example, that depicted by either formula (IIIa') or (IIIa"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (III).
[0528] A Purine Derivative of Formula (IIIa') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IIIa") when group A of the Purine Derivative of Formula
(IIIa') is the same as group A of the Purine Derivative of Formula (IIIa") and when
group D of the Purine Derivative of Formula (IIIa') is the same as group D of the
Purine Derivative of Formula (IIIa").
[0529] A Purine Derivative of Formula (IIIa") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IIIa') when group A of the Purine Derivative of Formula
(IIIa") is the same as group A of the Purine Derivative of Formula (IIIa') and when
group D of the Purine Derivative of Formula (IIIa") is the same as group D of the
Purine Derivative of Formula (IIIa').
[0530] In one embodiment, the Purine Derivatives of Formula (III) have the formula (IIIa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (IIIa') are substantially
free of their corresponding opposite enantiomer.
[0531] In another embodiment, the Purine Derivatives of Formula (III) have the formula (IIIa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (IIIa") are substantially
free of their corresponding opposite enantiomer.
[0532] In another embodiment, the Purine Derivatives of Formula (III) exist as a mixture
of a Purine Derivative of Formula (IIIa') and a Purine Derivative of Formula (IIIa")
wherein the amount of the Purine Derivative of Formula (IIIa') exceeds the amount
of the Purine Derivative of Formula (IIIa").
[0533] In a further embodiment, the Purine Derivatives of Formula (III) exist as a mixture
of a Purine Derivative of Formula (IIIa') and a Purine Derivative of Formula (IIIa")
wherein the amount of the Purine Derivative of Formula (IIIa") exceeds the amount
of the Purine Derivative of Formula (IIIa').
[0534] In another embodiment, the Purine Derivatives of Formula (III) exist as a racemic
mixture of a Purine Derivative of Formula (IIIa') and a Purine Derivative of Formula
(IIIa").
[0535] A Purine Derivative of Formula (IIIa') is the corresponding other anomer of a Purine
Derivative of Formula (III') when group A of the Purine Derivative of Formula (IIIa')
is the same as group A of the Purine Derivative of Formula (III') and when group D
of the Purine Derivative of Formula (IIIa') is the same as group D of the Purine Derivative
of Formula (III').
[0536] A Purine Derivative of Formula (III') is the corresponding other anomer of a Purine
Derivative of Formula (IIIa') when group A of the Purine Derivative of Formula (III')
is the same as group A of the Purine Derivative of Formula (IIIa') and when group
D of the Purine Derivative of Formula (III') is the same as group D of the Purine
Derivative of Formula (IIIa').
[0537] A Purine Derivative of Formula (IIIa") is the corresponding other anomer of a Purine
Derivative of Formula (III") when group A of the Purine Derivative of Formula (IIIa")
is the same as group A of the Purine Derivative of Formula (III") and when group D
of the Purine Derivative of Formula (IIIa") is the same as group D of the Purine Derivative
of Formula (III").
[0538] A Purine Derivative of Formula (III") is the corresponding other anomer of a Purine
Derivative of Formula (IIIa") when group A of the Purine Derivative of Formula (III")
is the same as group A of the Purine Derivative of Formula (IIIa") and when group
D of the Purine Derivative of Formula (III") is the same as group D of the Purine
Derivative of Formula (IIIa").
[0539] In one embodiment, the Purine Derivatives of Formula (III) have the formula (IIIa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (IIIa') are substantially
free of their corresponding other anomer.
[0540] In another embodiment, the Purine Derivatives of Formula (III) have the formula (IIIa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (IIIa") are substantially
free of their corresponding other anomer.
[0541] In one embodiment, the Purine Derivatives of Formula (III) have the formula (III'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (III') are substantially
free of their corresponding other anomer.
[0542] In another embodiment, the Purine Derivatives of Formula (III) have the formula (III"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (III), and wherein the Purine Derivatives of Formula (III") are substantially
free of their corresponding other anomer.
[0543] In one embodiment, the Purine Derivatives of Formula (III) exist as a mixture of
a Purine Derivative of Formula (III') and a Purine Derivative of Formula (IIIa') wherein
the amount of the Purine Derivative of Formula (III') exceeds the amount of the Purine
Derivative of Formula (IIIa')
[0544] In another embodiment, the Purine Derivatives of Formula (III) exist as a mixture
of a Purine Derivative of Formula (III') and a Purine Derivative of Formula (IIIa')
wherein the amount of the Purine Derivative of Formula (IIIa') exceeds the amount
of the Purine Derivative of Formula (III').
[0545] In another embodiment, the Purine Derivatives of Formula (IIIa) exist as a equal
mixture of a Purine Derivative of Formula (III') and a Purine Derivative of Formula
(IIIa').
[0546] In one embodiment, the Purine Derivatives of Formula (IIIa) exist as a mixture of
a Purine Derivative of Formula (III") and a Purine Derivative of Formula (IIIa") wherein
the amount of the Purine Derivative of Formula (III") exceeds the amount of the Purine
Derivative of Formula (IIIa").
[0547] In another embodiment, the Purine Derivatives of Formula (IIIa) exist as a mixture
of a Purine Derivative of Formula (III") and a Purine Derivative of Formula (IIIa")
wherein the amount of the Purine Derivative of Formula (IIIa") exceeds the amount
of the Purine Derivative of Formula (III").
[0548] In another embodiment, the Purine Derivatives of Formula (IIIa) exist as a equal
mixture of a Purine Derivative of Formula (III") and a Purine Derivative of Formula
(IIIa").
[0549] A first subclass of the Purine Derivatives of Formula (III) is that wherein one occurrence
of R
1 is -H.
[0550] A second subclass of the Purine Derivatives of Formula (III) is that wherein one
occurrence of R
1 is -H and the other occurrence of R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0551] A third subclass of the Purine Derivatives of Formula (III) is that wherein R
2 is -NH-N=C(R
5)R
6.
[0552] A fourth subclass of the Purine Derivatives of Formula (III) is that wherein R
3 is -ONO
2.
5.2.11 THE PURINE DERIVATIVES OF FORMULA (IV)
[0553] As stated above, the present invention encompasses Purine Derivatives having the
Formula (IV):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (IV),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0554] In one embodiment, R
1 is -C
3-C
8 monocyclic cycloalkyl.
[0555] In another embodiment, R
1 is -C
3-C
8 monocyclic cycloalkenyl.
[0556] In a specific embodiment, R
1 is cyclopentyl.
[0557] In one embodiment, R
2 is -H.
[0558] In another embodiment, R
2 is -halo.
[0559] In a specific embodiment, R
2 is -Cl.
[0560] In another embodiment, R
2 is -CN.
[0561] In another embodiment, R
2 is -N(R
3)
2, -OR
3 or -SR
3.
[0562] In another embodiment, R
2 is -NHNHC(O)R
3, -NHNHC(O)OR
3 or - NHNHC(O)NHR
3. In yet another embodiment, R
2 is -NH-N=C(R
4)R
5.
[0563] In a specific embodiment, R
2 is -NH-N=CH-cyclopropyl.
[0564] In one embodiment, C and D are
cis with respect to each other.
[0565] In another embodiment, C and D are
trans with respect to each other.
[0566] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (IV) and a physiologically acceptable carrier or vehicle.
[0567] The invention further provides Purine Derivatives of Formula (IV) that are in isolated
and purified form.
[0568] The invention still further provides uses of effective amounts of Purine Derivatives
of Formula (IV) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0569] The invention further provides uses of effective amounts of Purine Derivatives of
formula (IV) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0570] The invention further provides uses of effective amounts of Purine Derivatives of
formula (IV) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0571] The Purine Derivatives of Formula (IV) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (IV') or Formula (IV"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (IV).
[0572] A Purine Derivative of Formula (IV') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IV") when group A of the Purine Derivative of Formula
(IV') is the same as group A of the Purine Derivative of Formula (IV") and when group
D of the Purine Derivative of Formula (IV') is the same as group D of the Purine Derivative
of Formula (IV").
[0573] A Purine Derivative of Formula (IV") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IV') when group A of the Purine Derivatives of Formula
(IV") is the same as group A of the Purine Derivative of Formula (IV') and when group
D of the Purine Derivative of Formula (IV") is the same as group D of the Purine Derivative
of Formula (IV').
[0574] In one embodiment, the Purine Derivatives of Formula (IV) have the formula (IV'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IV') are substantially
free of their corresponding enantiomer, represented by Formula (IV").
[0575] In another embodiment, the Purine Derivatives of Formula (IV) have the formula (IV"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IV") are substantially
free of their corresponding enantiomer, represented by Formula (IV').
[0576] In one embodiment, the Purine Derivatives of Formula (IV) exist as a mixture of a
Purine Derivative of Formula (IV') and a Purine Derivative of Formula (IV") wherein
the amount of the Purine Derivative of Formula (IV') exceeds the amount of the Purine
Derivative of Formula (IV").
[0577] In another embodiment, the Purine Derivatives of Formula (IV) exist as a mixture
of a Purine Derivative of Formula (IV') and a Purine Derivative of Formula (IV") wherein
the amount of the Purine Derivative of Formula (IV") exceeds the amount of the Purine
Derivative of Formula (IV').
[0578] In another embodiment, the Purine Derivatives of Formula (IV) exist as a racemic
mixture of a Purine Derivative of Formula (IV') and a Purine Derivative of Formula
(IV")
[0579] In another embodiment, the Purine Derivatives of Formula (IV) can exist in the form
of a single enantiomer, for example, that depicted by either formula (IVa') or (IVa"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (IV).
[0580] A Purine Derivative of Formula (IVa') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IVa") when group A of the Purine Derivative of Formula
(IVa') is the same as group A of the Purine Derivative of Formula (IVa") and when
group D of the Purine Derivative of Formula (IVa') is the same as group D of the Purine
Derivative of Formula (IVa").
[0581] A Purine Derivative of Formula (IVa") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (IVa') when group A of the Purine Derivative of Formula
(IVa") is the same as group A of the Purine Derivative of Formula (IVa') and when
group D of the Purine Derivative of Formula (IVa") is the same as group D of the Purine
Derivative of Formula (IVa').
[0582] In one embodiment, the Purine Derivatives of Formula (IV) have the formula (IVa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IVa') are substantially
free of their corresponding opposite enantiomer.
[0583] In another embodiment, the Purine Derivatives of Formula (IV) have the formula (IVa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IVa") are substantially
free of their corresponding opposite enantiomer.
[0584] In another embodiment, the Purine Derivatives of Formula (IV) exist as a mixture
of a Purine Derivative of Formula (IVa') and a Purine Derivative of Formula (IVa")
wherein the amount of the Purine Derivative of Formula (IVa') exceeds the amount of
the Purine Derivative of Formula (IVa").
[0585] In a further embodiment, the Purine Derivatives of Formula (IV) exist as a mixture
of a Purine Derivative of Formula (IVa') and a Purine Derivative of Formula (IVa")
wherein the amount of the Purine Derivative of Formula (IVa") exceeds the amount of
the Purine Derivative of Formula (IVa').
[0586] In another embodiment, the Purine Derivatives of Formula (IV) exist as a racemic
mixture of a Purine Derivative of Formula (IVa') and a Purine Derivative of Formula
(IVa").
[0587] A Purine Derivative of Formula (IVa') is the corresponding other anomer of a Purine
Derivative of Formula (IV') when group A of the Purine Derivative of Formula (IVa')
is the same as group A of the Purine Derivative of Formula (IV') and when group D
of the Purine Derivative of Formula (IVa') is the same as group D of the Purine Derivative
of Formula (IV').
[0588] A Purine Derivative of Formula (IV') is the corresponding other anomer of a Purine
Derivative of Formula (IVa') when group A of the Purine Derivative of Formula (IV')
is the same as group A of the Purine Derivative of Formula (IVa') and when group D
of the Purine Derivative of Formula (IV') is the same as group D of the Purine Derivative
of Formula (IVa').
[0589] A Purine Derivative of Formula (IVa") is the corresponding other anomer of a Purine
Derivative of Formula (IV") when group A of the Purine Derivative of Formula (IVa")
is the same as group A of the Purine Derivative of Formula (IV") and when group D
of the Purine Derivative of Formula (IVa") is the same as group D of the Purine Derivative
of Formula (IV").
[0590] A Purine Derivative of Formula (IV") is the corresponding other anomer of a Purine
Derivative of Formula (IVa") when group A of the Purine Derivative of Formula (IV")
is the same as group A of the Purine Derivative of Formula (IVa") and when group D
of the Purine Derivative of Formula (IV") is the same as group D of the Purine Derivative
of Formula (IVa").
[0591] In one embodiment, the Purine Derivatives of Formula (IV) have the formula (IVa'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IVa') are substantially
free of their corresponding other anomer.
[0592] In another embodiment, the Purine Derivatives of Formula (IV) have the formula (IVa"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IVa") are substantially
free of their corresponding other anomer.
[0593] In one embodiment, the Purine Derivatives of Formula (IV) have the formula (IV'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IV') are substantially
free of their corresponding other anomer.
[0594] In another embodiment, the Purine Derivatives of Formula (IV) have the formula (IV"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (IV), and wherein the Purine Derivatives of Formula (IV") are substantially
free of their corresponding other anomer.
[0595] In one embodiment, the Purine Derivatives of Formula (IV) exist as a mixture of a
Purine Derivative of Formula (IV') and a Purine Derivative of Formula (IVa') wherein
the amount of the Purine Derivative of Formula (IV') exceeds the amount of the Purine
Derivative of Formula (IVa')
[0596] In another embodiment, the Purine Derivatives of Formula (IV) exist as a mixture
of a Purine Derivative of Formula (IV') and a Purine Derivative of Formula (IVa')
wherein the amount of the Purine Derivative of Formula (IVa') exceeds the amount of
the Purine Derivative of Formula (IV').
[0597] In another embodiment, the Purine Derivatives of Formula (IVa) exist as a equal mixture
of a Purine Derivative of Formula (IV') and a Purine Derivative of Formula (IVa').
[0598] In one embodiment, the Purine Derivatives of Formula (IVa) exist as a mixture of
a Purine Derivative of Formula (IV") and a Purine Derivative of Formula (IVa") wherein
the amount of the Purine Derivative of Formula (IV") exceeds the amount of the Purine
Derivative of Formula (IVa").
[0599] In another embodiment, the Purine Derivatives of Formula (IVa) exist as a mixture
of a Purine Derivative of Formula (IV") and a Purine Derivative of Formula (IVa")
wherein the amount of the Purine Derivative of Formula (IVa") exceeds the amount of
the Purine Derivative of Formula (IV").
[0600] In another embodiment, the Purine Derivatives of Formula (IVa) exist as a equal mixture
of a Purine Derivative of Formula (IV") and a Purine Derivative of Formula (IVa").
[0601] A first subclass of the Purine Derivatives of Formula (IV) is that wherein R
1 is -cyclopentyl.
[0602] A second subclass of the Purine Derivatives of Formula (IV) is that wherein R
2 is -H.
[0603] A third subclass of the Purine Derivatives of Formula (IV) is that wherein R
2 is -Cl.
[0604] Illustrative Purine Derivatives of Formula (IV) include the compounds listed below:

and pharmaceutically acceptable salts thereof.
5.2.12 THE PURINE DERIVATIVES OF FORMULA (V)
[0605] As stated above, the present invention encompasses Purine Derivatives having the
Formula (V):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (V),
and A and B are
trans with respect to each other; B and C are
cis with respect to each other; and C and D are
cis or
trans with respect to each other.
[0606] In one embodiment, R
1 is -C
1-C
10 alkyl.
[0607] In another embodiment, R
1 is -(CH
2)
m-(3- to 7-membered monocyclic heterocycle) or -(CH
2)
m-(8- to 12-membered bicyclic heterocycle).
[0608] In another embodiment, R
1 is -(CH
2)
m-(C
8-C
12 bicyclic cycloalkyl) or - (CH
2)
n-(C
8-C
12 bicyclic cycloalkenyl).
[0609] In still another embodiment, R
1 is -(CH
2)
m-(C
3-C
8 monocyclic cycloalkyl) or -(CH
2)
m-(C
3-C
8 monocyclic cycloalkenyl).
[0610] In a further embodiment, R
1 is -(CH
2)
m-aryl.
[0611] In one embodiment, R
1a is -C
3-C
8 monocyclic cycloalkyl.
[0612] In another embodiment, R
1a is -C
3-C
8 monocyclic cycloalkenyl.
[0613] In a specific embodiment, R
1a is cyclopentyl.
[0614] In another embodiment, R
1 and R
1a together with the carbon atom to which they are attached form a -C
3-C
8 monocyclic cycloalkyl, a -C
3-C
8 monocyclic cycloalkenyl, a -C
8-C
12 bicyclic cycloalkyl, or a -C
8-C
12 bicyclic cycloalkenyl.
[0615] In one embodiment, R
2 is -OR
4 or -SR
4.
[0616] In another embodiment, R
2 is -NHNHC(O)R
3, -NHNHC(O)OR
3 or - NHNHC(O)NHR
3. In yet another embodiment, R
2 is -NH-N=C(R
5)R
6.
[0617] In a specific embodiment, R
2 is -NH-N=CH-cyclopropyl.
[0618] In one embodiment, C and D are
cis with respect to each other.
[0619] In another embodiment, C and D are
trans with respect to each other.
[0620] The present invention also provides compositions comprising an effective amount of
a Purine Derivative of Formula (V) and a physiologically acceptable carrier or vehicle.
[0621] The invention further provides Purine Derivatives of Formula (V) that are in isolated
and purified form.
[0622] The invention still further provides uses of effective amounts of Purine Derivatives
of formula (V) for the preparation of medicaments for treating or preventing a Condition,
in an animal in need thereof.
[0623] The invention further provides uses of effective amounts of Purine Derivatives of
formula (V) for the preparation of medicaments for reducing an animal's rate of metabolism,
in an animal in need thereof.
[0624] The invention further provides uses of effective amounts of Purine Derivatives of
formula (V) for the preparation of medicaments protecting an animal's heart against
myocardial damage during cardioplegia, in an animal in need thereof.
[0625] The Purine Derivatives of Formula (V) can exist in the form of a single enantiomer,
for example, that depicted by either the Formula (V') or Formula (V"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (V).
[0626] A Purine Derivative of Formula (V') is the corresponding opposite enantiomer of a
Purine Derivative of Formula (V") when group A of the Purine Derivative of Formula
(V') is the same as group A of the Purine Derivative of Formula (V") and when group
D of the Purine Derivative of Formula (V') is the same as group D of the Purine Derivative
of Formula (V").
[0627] A Purine Derivative of Formula (V") is the corresponding opposite enantiomer of a
Purine Derivative of Formula (V') when group A of the Purine Derivatives of Formula
(V") is the same as group A of the Purine Derivative of Formula (V') and when group
D of the Purine Derivative of Formula (V") is the same as group D of the Purine Derivative
of Formula (V').
[0628] In one embodiment, the Purine Derivatives of Formula (V) have the formula (V'), depicted
above, wherein A, B, C and D are defined above for the Purine Derivatives of Formula
(V), and wherein the Purine Derivatives of Formula (V') are substantially free of
their corresponding enantiomer, represented by Formula (V").
[0629] In another embodiment, the Purine Derivatives of Formula (V) have the formula (V"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (V") are substantially
free of their corresponding enantiomer, represented by Formula (V').
[0630] In one embodiment, the Purine Derivatives of Formula (V) exist as a mixture of a
Purine Derivative of Formula (V') and a Purine Derivative of Formula (V")
wherein the amount of the Purine Derivative of Formula (V') exceeds the amount of
the Purine Derivative of Formula (V").
[0631] In another embodiment, the Purine Derivatives of Formula (V) exist as a mixture of
a Purine Derivative of Formula (V') and a Purine Derivative of Formula (V")
wherein the amount of the Purine Derivative of Formula (V") exceeds the amount of
the Purine Derivative of Formula (V').
[0632] In another embodiment, the Purine Derivatives of Formula (V) exist as a racemic mixture
of a Purine Derivative of Formula (V') and a Purine Derivative of Formula (V")
[0633] In another embodiment, the Purine Derivatives of Formula (V) can exist in the form
of a single enantiomer, for example, that depicted by either formula (Va') or (Va"):

wherein A, B, C and D are defined above for the Purine Derivatives of Formula (V).
[0634] A Purine Derivative of Formula (Va') is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Va") when group A of the Purine Derivative of Formula
(Va') is the same as group A of the Purine Derivative of Formula (Va") and when group
D of the Purine Derivative of Formula (Va') is the same as group D of the Purine Derivative
of Formula (Va").
[0635] A Purine Derivative of Formula (Va") is the corresponding opposite enantiomer of
a Purine Derivative of Formula (Va') when group A of the Purine Derivative of Formula
(Va") is the same as group A of the Purine Derivative of Formula (Va') and when group
D of the Purine Derivative of Formula (Va") is the same as group D of the Purine Derivative
of Formula (Va').
[0636] In one embodiment, the Purine Derivatives of Formula (V) have the formula (Va'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (Va') are substantially
free of their corresponding opposite enantiomer.
[0637] In another embodiment, the Purine Derivatives of Formula (V) have the formula (Va"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (Va") are substantially
free of their corresponding opposite enantiomer.
[0638] In another embodiment, the Purine Derivatives of Formula (V) exist as a mixture of
a Purine Derivative of Formula (Va') and a Purine Derivative of Formula (Va") wherein
the amount of the Purine Derivative of Formula (Va') exceeds the amount of the Purine
Derivative of Formula (Va").
[0639] In a further embodiment, the Purine Derivatives of Formula (V) exist as a mixture
of a Purine Derivative of Formula (Va') and a Purine Derivative of Formula (Va") wherein
the amount of the Purine Derivative of Formula (Va") exceeds the amount of the Purine
Derivative of Formula (Va').
[0640] In another embodiment, the Purine Derivatives of Formula (V) exist as a racemic mixture
of a Purine Derivative of Formula (Va') and a Purine Derivative of Formula (Va").
[0641] A Purine Derivative of Formula (Va') is the corresponding other anomer of a Purine
Derivative of Formula (V') when group A of the Purine Derivative of Formula (Va')
is the same as group A of the Purine Derivative of Formula (V') and when group D of
the Purine Derivative of Formula (Va') is the same as group D of the Purine Derivative
of Formula (V').
[0642] A Purine Derivative of Formula (V') is the corresponding other anomer of a Purine
Derivative of Formula (Va') when group A of the Purine Derivative of Formula (V')
is the same as group A of the Purine Derivative of Formula (Va') and when group D
of the Purine Derivative of Formula (V') is the same as group D of the Purine Derivative
of Formula (Va').
[0643] A Purine Derivative of Formula (Va") is the corresponding other anomer of a Purine
Derivative of Formula (V") when group A of the Purine Derivative of Formula (Va")
is the same as group A of the Purine Derivative of Formula (V") and when group D of
the Purine Derivative of Formula (Va") is the same as group D of the Purine Derivative
of Formula (V").
[0644] A Purine Derivative of Formula (V") is the corresponding other anomer of a Purine
Derivative of Formula (Va") when group A of the Purine Derivative of Formula (V")
is the same as group A of the Purine Derivative of Formula (Va") and when group D
of the Purine Derivative of Formula (V") is the same as group D of the Purine Derivative
of Formula (Va").
[0645] In one embodiment, the Purine Derivatives of Formula (V) have the formula (Va'),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (Va') are substantially
free of their corresponding other anomer.
[0646] In another embodiment, the Purine Derivatives of Formula (V) have the formula (Va"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (Va") are substantially
free of their corresponding other anomer.
[0647] In one embodiment, the Purine Derivatives of Formula (V) have the formula (V'), depicted
above, wherein A, B, C and D are defined above for the Purine Derivatives of Formula
(V), and wherein the Purine Derivatives of Formula (V') are substantially free of
their corresponding other anomer.
[0648] In another embodiment, the Purine Derivatives of Formula (V) have the formula (V"),
depicted above, wherein A, B, C and D are defined above for the Purine Derivatives
of Formula (V), and wherein the Purine Derivatives of Formula (V") are substantially
free of their corresponding other anomer.
[0649] In one embodiment, the Purine Derivatives of Formula (V) exist as a mixture of a
Purine Derivative of Formula (V') and a Purine Derivative of Formula (Va')
wherein the amount of the Purine Derivative of Formula (V') exceeds the amount of
the Purine Derivative of Formula (Va')
[0650] In another embodiment, the Purine Derivatives of Formula (V) exist as a mixture of
a Purine Derivative of Formula (V') and a Purine Derivative of Formula (Va')
wherein the amount of the Purine Derivative of Formula (Va') exceeds the amount of
the Purine Derivative of Formula (V').
[0651] In another embodiment, the Purine Derivatives of Formula (Va) exist as a equal mixture
of a Purine Derivative of Formula (V') and a Purine Derivative of Formula (Va').
[0652] In one embodiment, the Purine Derivatives of Formula (Va) exist as a mixture of a
Purine Derivative of Formula (V") and a Purine Derivative of Formula (Va") wherein
the amount of the Purine Derivative of Formula (V") exceeds the amount of the Purine
Derivative of Formula (Va").
[0653] In another embodiment, the Purine Derivatives of Formula (Va) exist as a mixture
of a Purine Derivative of Formula (V") and a Purine Derivative of Formula (Va") wherein
the amount of the Purine Derivative of Formula (Va") exceeds the amount of the Purine
Derivative of Formula (V").
[0654] In another embodiment, the Purine Derivatives of Formula (Va) exist as a equal mixture
of a Purine Derivative of Formula (V") and a Purine Derivative of Formula (Va").
5.3 METHODS FOR MAKING THE PURINE DERIVATIVES
[0656] Scheme 1 shows methods for making nucleoside intermediates that are useful for making
the Purine Derviatives of Formulas (Ia), (Ib), (Ic), (Id), (Ie), (If), (Ig), (Ih),
(II), (III), (IV) and (V).

wherein R
2 is as defined above for the Purine Derviatives of Formulas (Ia), (Ib), (Ic), (Id),
(Ie), (If), (Ig), (Ih), (II), (III), (IV) and (V).
[0657] The protected ribose compound of Formula
1 can be coupled with a purine compound of Formula
2 using lithium hexamethyldisilazide and trimethylsilyl triflate, followed by acetonide
removal using trifluoroacetic acid to provide nucleoside intermediates of Formula
3 and their corresponding other anomers of Formula
4. Similarly, the ribose diacetate of Formula
5 can be coupled with a compound of Formula
2 using lithium hexamethyldisilazide and trimethylsilyl triflate to provide acetonide-protected
nucleoside intermediates of Formula
6 and their corresponding other anomers of Formula
7.
[0658] Scheme
2 shows a method useful for making the adenosine intermediates of Formula
8 which are useful for making the Purine Derviatives of Formulas (Ia), (Ib), (Ic),
(Id) and (Ie).

where R
1 and R
2 are defined above herein for the Purine Derivatives.
[0659] The 6-chloroadenosine derivative of formula
3a is converted to its 2',3'-acetonide using acetone and 2,2-dimethoxypropane in the
presence of camphorsulfonic acid. The acetonide can be further derviatized using an
amine of formula R
1-NH
2 in the presence of base to provide compounds of formula
8.
[0660] Scheme 3 shows a method useful for making the Purine Derivatives of Formula (Ia)

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (Ia).
[0661] The adenosine intermediates of formula
8 can be converted to their 5'-sulfonic acid analogs, which can then be chlorinated
using thionyl chloride to provide the corresponding 5'-chlorosulfonate intermediates.
The chlorosulfonate intermediates can then be reacted with ammonia to provide the
corresponding 5'-sulfonamide intermediates. Acetonide removal using TFA/water provides
the Purine Derivatives of Formula (Ia).
[0662] Methodology useful for making Purine Derivatives of Formula (Ib) is described in
Scheme 4.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (Ib).
[0663] The Adenosine intermediates of formula
8 can be converted to their 5'-nitrate analogs using nitric acid in the presence of
acetic anhydride, or other nitrating agents, such as MsCl/ONO
3 or nitrosonium tetrafluoroborate. Acetonide removal using TFA/water provides Purine
Derivatives of Formula (Ib).
[0664] Methodology useful for making the Purine Derivatives of Formula (Ic) is outlined
below in Scheme 5.

where R
1, R
2 and R
5 are defined above herein for the Purine Derivatives of Formula (Ic).
[0665] The adenosine intermediates of formula
8 can be converted to their 5'-alkoxyphosphonium perchlorate analogs using CCl
4-P(NMe
2)
3, then treating the product of this reaction with ammonium perchlorate. The intermediate
5'-alkoxyphosphonium perchlorates can subsquently be reacted with an amine of formula
NH
2R
5 to provide the 5'-amino analogs. Acetonide removal using TFA/water provides the Purine
Derivatives of Formula (Ic).
[0666] Methodology useful for making the Purine Derivatives of Formula (Id)
wherein R
3 is -CH
2OSO
3H is outlined in Scheme 6.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (Id).
[0667] The adenosine intermediates of formula
8 can be treated with sulfur trioxide-pyridine complex to provide the corresponding
5'-sulfonic acid pyridine salt intermediate. The pyridine salt intermediate can then
be neutralized using NaOH or KOH, followed by acetonide removal using TFA/water to
provide the corresponding sodium or potassium salt, respectively, of the Purine Derivatives
of Formula (Id) wherein R
3 is - CH
2OSO
3H. Treatment of the sodium or potassium salt with strong aqueous acid, such as sulfuric
or hydrochloric acid, provides the Purine Derivatives of Formula (Id) wherein R
3 is - CH
2OSO
3H.
[0668] Methodology useful for making the Purine Derivatives of Formula (Id) wherein R
3 is -ONO is outlined in Scheme 7.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (Id).
[0669] The adenosine intermediates of formula
8 can be treated with nitrosonium fluoroborate complex to provide the corresponding
nitrosooxy intermediates. Acetonide removal using TFA/water provides the Purine Derivatives
of Formula (Id) wherein R
3 is - CH
2ONO.
[0670] Methodology useful for making the Purine Derivatives of Formula (Ie) wherein R
3 is
-OSO
2NH(C
1-C
10 alkyl), -OSO
2N(C
1-C
10 alkyl)
2, or -OSO
2NH-aryl, is outlined in Scheme 8.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (Ie).
[0671] The adenosine intermediates of formula
8 can be reacted with sulfur trioxide-pyridine complex to provide the corresponding
5'-sulfonic acid intermediates, which can subsequently be treated with thionyl chloride
to provide the intermediate 5'-chlorosulfonate intermediates. The chlorosulfonate
intermediates can then be reacted with an amine of formula H
2N-(C
1-C
10 alkyl), HN(C
1-C
10 alkyl)
2 or H
2N-aryl to provide the corresponding 5'-sulfonamide intermediates. Acetonide removal
using TFA/water provides the Purine Derivatives of Formula (Ie) wherein R
3 is - OSO
2NH(C
1-C
10 alkyl), -OSO
2N(C
1-C
10 alkyl)
2, or -OSO
2NH-aryl.
[0672] Methodology useful for making the Purine Derivatives of Formulas (II) is outlined
in Scheme 9.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (II).
[0673] The 6-chloroadenosine derivatives of Formula
3a can be converted to their 6-hydrazine derivatives of Formula
9 upon reacting with hydrazine. Compounds of Formula
9 can then be treated with a carbonyl compound of formula
10 to provide the Purine Derivatives of Formula (II).
[0674] Methodology useful for making the Purine Derivatives of Formula (III) is outlined
in Scheme 10.

where R
1, R
2 and R
3 are defined above herein for the Purine Derivatives of Formula (III).
[0675] The compounds of Formula
3b can be protected as their 2',3'-acetonide derivatives and their 5'-OH group can be
converted to an R
3 group using methodology well known to one skilled in the art of organic synthesis.
Subsequent removal of the acetonide unit using TFA affords the 6-chloroadenosine compounds
of formula
12 which can be converted to their 6-hydrazino derivatives of formula
13 using hydrazine. The hydrazino compounds of formula
13 can then be treated with a carbonyl compound of formula
10 to provide the Purine Derivatives of Formula (III).
[0676] Methodology useful for making the Purine Derivatives of Formula (IV) is outlined
in Scheme 11.

where R
1 and R
2 are defined above herein for the Purine Derivatives of Formula (IV).
[0677] The 6-chloroadenosine derivatives of Formula
3a can be converted to their 6-hydrazine derivatives of Formula
9 upon reacting with hydrazine. Compounds of Formula
9 can then be treated with an aldehyde of formula
14 to provide the Purine Derivatives of Formula (IV).
[0678] Methodology useful for making the Purine Derivatives of Formula (V) is outlined in
Scheme 12.

where R
1, R
1a and R
2 are defined above herein for the Purine Derivatives of Formula (V).
[0679] The 6-chloroadenosine derivatives of Formula
3a can be converted to their 6-hydrazine derivatives of Formula
9 upon reacting with hydrazine. Compounds of Formula
9 can then be treated with a carbonyl compound of formula
15 to provide the Purine Derivatives of Formula (V).
[0680] Methodology useful for making the Purine Derivatives of Formula (Ih), wherein R
1 is cyclopent-1-ol-2-yl is outlined in Scheme 13.

[0681] 2-Aminocyclopentanol (
34) is reacted with carbobenzoyloxy chloride (CBZCl) to protect the amino functionality
as its carbobenzoyloxy derivative. The OH group of the carbobenzoyloxy derivative
is then converted to its corresponding triethylsilyl ether using triethylsilyl chloride
in the presence of imidazole. The carbobenzoyloxy protecting group is then removed
via catalytic hydrogenation to provide amine compound
35. Compound
35 is coupled with compound
36 in refluxing ethanol to provide compound
37, which is subsequently nitrated using acetic anhydride/nitric acid and then reacted
with trifluroacetic acid to remove the acetonide group and provide compound
38.
[0682] Methodology useful for making the Purine Derivatives of Formula (Ih), wherein R
1 is cyclopent-1-ol-3-yl is outlined in Scheme 14.

[0683] 3-Aminocyclopentanol (
39) is reacted with CBZCl to protect the amino functionality as its carbobenzoyloxy
derivative. The OH group of the carbobenzoyloxy derivative is then converted to its
corresponding triethylsilyl ether using triethylsilyl chloride in the presence of
imidazole. The carbobenzoyloxy protecting group is then removed via catalytic hydrogenation
to provide amine compound
40. Compound
40 is coupled with compound
36 in refluxing ethanol to provide compound
41, which is subsequently nitrated using acetic anhydride/nitric acid and then reacted
with trifluroacetic acid to remove the acetonide group and provide compound
42.
5.4 THERAPEUTIC/PROPHYLACTIC ADMINISTRATION
AND COMPOSITIONS OF THE INVENTION
[0684] Due to their activity, the Purine Derivatives are advantageously useful in veterinary
and human medicine. As described above, the Purine Derivatives are useful for: (i)
treating or preventing a Condition in an animal in need thereof; (ii) reducing an
animal's rate of metabolism; or (iii) protecting an animal's heart against myocardial
damage during cardioplegia.
[0685] When administered to an animal, the Purine Derivatives can be administered as a component
of a composition that comprises a physiologically acceptable carrier or vehicle. The
present compositions, which comprise a Purine Derivative, can be administered orally.
The Purine Derivatives can also be administered by any other convenient route, for
example, by infusion or bolus injection, by absorption through epithelial or mucocutaneous
linings (
e.g., oral, rectal, or intestinal mucosa) and can be administered together with another
biologically active agent. Administration can be systemic or local. Various known
delivery systems, including encapsulation in liposomes, microparticles, microcapsules,
and capsules, can be used.
[0686] Methods of administration include, but are not limited to, intradermal, intramuscular,
intraperitoneal, intravenous, subcutaneous, intranasal, epidural, oral, sublingual,
intracerebral, intravaginal, transdermal, rectal, by inhalation, or topical, particularly
to the ears, nose, eyes, or skin. In some instances, administration will result in
the release of the Purine Derivatives into the bloodstream. The mode of administration
can be left to the discretion of the practitioner.
[0687] In one embodiment, the Purine Derivatives are administered orally.
[0688] In another embodiment, the Purine Derivatives are administered intravenously.
[0689] In another embodiment, when the Purine Derivatives are used to reduce an animal's
rate of metabolism, the Purine Derviatives can be administered by continuous intravenous
infusion.
[0690] In other embodiments, it can be desirable to administer the Purine Derivatives locally.
This can be achieved, for example, and not by way of limitation, by local infusion
during surgery, topical application,
e.g., in conjunction with a wound dressing after surgery, by injection, by means of a
catheter, by means of a suppository or enema, or by means of an implant, said implant
being of a porous, non-porous, or gelatinous material, including membranes, such as
sialastic membranes, or fibers.
[0691] In certain embodiments, it can be desirable to introduce the Purine Derivatives into
the central nervous system, circulatory system or gastrointestinal tract by any suitable
route, including intraventricular, intrathecal injection, paraspinal injection, epidural
injection, enema, and by injection adjacent to a peripheral nerve. Intraventricular
injection can be facilitated by an intraventricular catheter, for example, attached
to a reservoir, such as an Ommaya reservoir.
[0692] Pulmonary administration can also be employed,
e.g., by use of an inhaler of nebulizer, and formulation with an aerosolizing agent,
or via perfusion in a fluorocarbon or synthetic pulmonary surfactant. In certain embodiments,
the Purine Derivatives can be formulated as a suppository, with traditional binders
and excipients such as triglycerides.
[0694] In yet another embodiment the Purine Derivatives can be delivered in a controlled-release
system or sustained-release system (
see, e.g., Goodson, in Medical Applications of Controlled Release, supra; vol. 2, pp. 115-138
(1984)). Other controlled or sustained-release systems discussed in the review by
Langer, Science 249:1527-1533 (1990) can be used. In one embodiment a pump can be used (
Langer, Science 249:1527-1533 (1990);
Sefton, CRC Crit. Ref. Biomed. Eng. 14:201 (1987);
Buchwald et al., Surgery 88:507 (1980); and
Saudek et al., N. Engl. J Med. 321:574 (1989)). In another embodiment polymeric materials can be used (see
Medical Applications of Controlled Release (Langer and Wise eds., 1974);
Controlled Drug Bioavailability, Drug Product Design and Performance (Smolen and Ball
eds., 1984);
Ranger and Peppas, J. Macromol. Sci. Rev. Macromol. Chem. 2:61 (1983);
Levy et al., Science 228:190 (1935);
During al., Ann. Neural. 25:351 (1989); and
Howard et al., J. Neurosurg. 71:105 (1989)).
[0695] In yet another embodiment a controlled- or sustained-release system can be placed
in proximity of a target of the Purine Derivatives,
e.g., the spinal column, brain, colon, skin, heart, lung, or gastrointestinal tract,
thus requiring only a fraction of the systemic dose.
[0696] The present compositions can optionally comprise a suitable amount of a physiologically
acceptable excipient.
[0697] Such physiologically acceptable excipients can be liquids, such as water and oils,
including those of petroleum, animal, vegetable, or synthetic origin, such as peanut
oil, soybean oil, mineral oil, sesame oil and the like. The physiologically acceptable
excipients can be saline, gum acacia, gelatin, starch paste, talc, keratin, colloidal
silica, urea and the like. In addition, auxiliary, stabilizing, thickening, lubricating,
and coloring agents can be used. In one embodiment the physiologically acceptable
excipients are sterile when administered to an animal. Water can be a particularly
useful excipient when the Purine Derivative is administered intravenously. Saline
solutions and aqueous dextrose and glycerol solutions can also be employed as liquid
excipients, particularly for injectable solutions. Suitable physiologically acceptable
excipients also include starch, glucose, lactose, sucrose, gelatin, malt, rice, flour,
chalk, silica gel, sodium stearate, glycerol monostearate, talc, sodium chloride,
dried skim milk, glycerol, propylene, glycol, water, ethanol and the like. The present
compositions, if desired, can also contain minor amounts of wetting or emulsifying
agents, or pH buffering agents.
[0698] The present compositions can take the form of solutions, suspensions, emulsion, tablets,
pills, pellets, capsules, capsules containing liquids, powders, sustained-release
formulations, suppositories, emulsions. aerosols, sprays, suspensions, or any other
form suitable for use. In one embodiment the composition is in the form of a capsule.
Other examples of suitable physiologically acceptable excipients are described in
Remington's Pharmaceutical Sciences 1447-1676 (Alfonso R. Gennaro eds., 19th ed. 1995).
[0699] In one embodiment the Purine Derivatives are formulated in accordance with routine
procedures as a composition adapted for oral administration to human beings. Compositions
for oral delivery can be in the form of tablets, lozenges, aqueous or oily suspensions,
granules, powders, emulsions, capsules, syrups, or elixirs for example. Orally administered
compositions can contain one or more agents, for example, sweetening agents such as
fructose, aspartame or saccharin; flavoring agents such as peppermint, oil of wintergreen,
or cherry; coloring agents; and preserving agents, to provide a pharmaceutically palatable
preparation. Moreover, where in tablet or pill form, the compositions can be coated
to delay disintegration and absorption in the gastrointestinal tract thereby providing
a sustained action over an extended period of time. Selectively permeable membranes
surrounding an osmotically active driving a Purine Derivative are also suitable for
orally administered compositions. In these latter platforms, fluid from the environment
surrounding the capsule can be imbibed by the driving compound, which swells to displace
the agent or agent composition through an aperture. These delivery platforms can provide
an essentially zero order delivery profile as opposed to the spiked profiles of immediate
release formulations. A time-delay material such as glycerol monostearate or glycerol
stearate can also be used. Oral compositions can include standard excipients such
as mannitol, lactose, starch, magnesium stearate, sodium saccharin, cellulose, and
magnesium carbonate. In one embodiment the excipients are of pharmaceutical grade.
[0700] In another embodiment the Purine Derivatives can be formulated for intravenous administration.
Typically, compositions for intravenous administration comprise sterile isotonic aqueous
buffer. Where necessary, the compositions can also include a solubilizing agent. Compositions
for intravenous administration can optionally include a local anesthetic such as lignocaine
to lessen pain at the site of the injection. The compositions' components can be supplied
either separately or mixed together in unit dosage form, for example, as a dry lyophilized
powder or water- free concentrate in a hermetically sealed container such as an ampule
or sachette indicating the quantity of Purine Derivative. Where the Purine Derivatives
are to be administered by infusion, they can be dispensed, for example, with an infusion
bottle containing sterile pharmaceutical grade water or saline. Where the Purine Derivatives
are administered by injection, an ampule of sterile water for injection or saline
can be provided so that the ingredients can be mixed prior to administration.
[0701] The Purine Derivatives can be administered by controlled-release or sustained-release
means or by delivery devices that are well known to those of ordinary skill in the
art. Such dosage forms can be used to provide controlled- or sustained-release of
one or more active ingredients using, for example, hydropropylmethyl cellulose, other
polymer matrices, gels, permeable membranes, osmotic systems, multilayer coatings,
microparticles, liposomes, microspheres, or a combination thereof to provide the desired
release profile in varying proportions. Suitable controlled- or sustained-release
formulations known to those skilled in the art, including those described herein,
can be readily selected for use with the active ingredients of the invention. The
invention thus encompasses single unit dosage forms suitable for oral administration
such as, but not limited to, tablets, capsules, gelcaps, and caplets that are adapted
for controlled- or sustained-release.
[0702] In one embodiment a controlled- or sustained-release composition comprises a minimal
amount of a Purine Derivative to treat or prevent the Condition in a minimal amount
of time. Advantages of controlled- or sustained-release compositions include extended
activity of the drug, reduced dosage frequency, and increased patient compliance.
In addition, controlled- or sustained-release compositions can favorably affect the
time of onset of action or other characteristics, such as blood levels of the Purine
Derivative, and can thus reduce the occurrence of adverse side effects.
[0703] Controlled- or sustained-release compositions can initially release an amount of
a Purine Derivative that promptly produces the desired therapeutic or prophylactic
effect, and gradually and continually release other amounts of the Purine Derivative
to maintain this level of therapeutic or prophylactic effect over an extended period
of time. To maintain a constant level of the Purine Derivative in the body, the Purine
Derivative can be released from the dosage form at a rate that will replace the amount
of Purine Derivative being metabolized and excreted from the body. Controlled- or
sustained-release of an active ingredient can be stimulated by various conditions,
including but not limited to, changes in pH, changes in temperature, concentration
or availability of enzymes, concentration or availability of water, or other physiological
conditions or compounds.
[0704] The amount of the Purine Derivative that is effective for use in treating or preventing
a Condition, reducing an animal's rate of metabolism, or protecting an animal's heart
against myocardial damage during cardioplegia, can be determined by standard clinical
techniques. In addition,
in vitro or
in vivo assays can optionally be employed to help identify optimal dosage ranges. The precise
dose to be employed can also depend on the route of administration, and the seriousness
of the condition being treated and can be decided according to the judgment of a health-care
practitioner. Suitable effective dosage amounts, however, range from about 10 micrograms
to about 5 grams about every 4 h, although they are typically about 500 mg or less
per every 4 hours. In one embodiment the effective dosage is about 0.01 mg, 0.5 mg,
about 1 mg, about 50 mg, about 100 mg, about 200 mg, about 300 mg, about 400 mg, about
500 mg, about 600 mg, about 700 mg, about 800 mg, about 900 mg, about 1 g, about 1.2
g, about 1.4 g, about 1.6 g, about 1.8 g, about 2.0 g, about 2.2 g, about 2.4 g, about
2.6 g, about 2.8 g, about 3.0 g, about 3.2 g, about 3.4 g, about 3.6 g, about 3.8
g, about 4.0g, about 4.2 g, about 4.4 g, about 4.6 g, about 4.8 g, and about 5.0 g,
every 4 hours. Equivalent dosages can be administered over various time periods including,
but not limited to, about every 2 hours, about every 6 hours, about every 8 hours,
about every 12 hours, about every 24 hours, about every 36 hours, about every 48 hours,
about every 72 hours, about every week, about every two weeks, about every three weeks,
about every month, and about every two months. The number and frequency of dosages
corresponding to a completed course of therapy can be determined according to the
judgment of a health-care practitioner. The effective dosage amounts described herein
refer to total amounts administered; that is, if more than one Purine Derivative is
administered, the effective dosage amounts correspond to the total amount administered.
[0705] The amount of a Purine Derivative that is effective for use in treating or preventing
a Condition, or protecting an animal's heart against myocardial damage during cardioplegia
typically range from about 0.01 mg/kg to about 100 mg/kg of body weight per day, in
one embodiment, from about 0.1 mg/kg to about 50 mg/kg body weight per day, and in
another embodiment, from about 1 mg/kg to about 20 mg/kg of body weight per day.
[0706] The amount of a Purine Derivative that is effective for use in reducing an animal's
rate of metabolism typically range from about about 1 µg/kg to about 10 mg/kg, in
one embodiment, from about 0.1 mg/kg to about 5 mg/kg body weight per day, and in
another embodiment, from about 1 mg/kg to about 2.5 mg/kg of body weight per day.
[0707] When a Purine Derviative is a component of a solution that is useful for maintaining
the viability of an organ
ex vivo, the concentration of the Purine Derivative in the solution that is effective for
maintaining the viability of the organ is between about 1 nM to about 1 mM.
[0708] The Purine Derivatives can be assayed
in vitro or
in vivo for the desired therapeutic or prophylactic activity prior to use in humans. Animal
model systems can be used to demonstrate safety and efficacy.
[0709] The present uses for the preparation of medicaments for treating or preventing a
Condition, reducing an animal's rate of metabolism, or protecting an animal's heart
against myocardial damage during cardioplegia, can further comprise administering
another therapeutic agent to the animal being administered a Purine Derivative. In
one embodiment the other therapeutic agent is administered in an effective amount.
[0710] Effective amounts of the other therapeutic agents are well known to those skilled
in the art. However, it is well within the skilled artisan's purview to determine
the other therapeutic agent's optimal effective amount range. In one embodiment of
the invention, where, another therapeutic agent is administered to an animal, the
effective amount of the Purine Derivative is less than its effective amount would
be where the other therapeutic agent is not administered. In this case, without being
bound by theory, it is believed that the Purine Derivatives and the other therapeutic
agent act synergistically.
[0711] In one embodiment the other therapeutic agent is an anti-inflammatory agent. Examples
of useful anti-inflammatory agents include, but are not limited to, adrenocorticosteroids,
such as cortisol, cortisone, fluorocortisone, prednisone, prednisolone, 6a-methylprednisolone,
triamcinolone, betamethasone, and dexamethasone; and non-steroidal anti-inflammatory
agents (NSAIDs), such as aspirin, acetaminophen, indomethacin, sulindac, tolmetin,
diclofenac, ketorolac, ibuprofen, naproxen, flurbiprofen, ketoprofen, fenoprofen,
oxaprozin, mefenamic acid, meclofenamic acid, piroxicam, meloxicam, nabumetone, rofecoxib,
celecoxib, etodolac, and nimesulide.
[0712] In another embodiment the other therapeutic agent is an anti-diabetic agent. Examples
of useful anti-diabetic agents include, but are not limited to, glucagons; somatostatin;
diazoxide; sulfonylureas, such as tolbutamide, acetohexamide, tolazamide, chloropropamide,
glybenclamide, glipizide, gliclazide, and glimepiride; insulin secretagogues, such
as repaglinide, and nateglinide; biguanides, such as metformin and phenformin; thiazolidinediones,
such as pioglitazone, rosiglitazone, and troglitazone; and α-glucosidase inhibitors,
such as acarbose and miglitol.
[0713] In a further embodiment the other therapeutic agent is an anti-cardiovascular-disease
agent. Examples of useful anti-cardiovascular-disease agents include, but are not
limited to, carnitine; thiamine; lidocaine; amiodarone; procainamide; mexiletine;
bretylium tosylate; propanolol; sotalol; and muscarinic receptor antagonists, such
as atropine, scopolamine, homatropine, tropicamide, pirenzipine, ipratropium, tiotropium,
and tolterodine.
[0714] In another embodiment the other therapeutic agent is an analgesic agent. Examples
of useful analgesic agents include, but are not limited to, buprenorphine, meperidine,
morphine, codeine, propoyxphene, fentanyl, sufentanil, etorphine hydrochloride, hydrocodone,
hydromorphone, nalbuphine, butorphanol, oxycodone, aspirin, ibuprofen, naproxen sodium,
acetaminophen, xylazine, metedomidine, carprofen, naprosin, and pentazocine.
[0715] In a specific embodiment, the other therapeutic agent is buprenorphine.
[0716] In another embodiment, the other therapeutic agent is an antiemetic agent. Examples
of useful antiemetic agents include, but are not limited to, metoclopromide, domperidone,
prochlorperazine, promethazine, chlorpromazine, trimethobenzamide, ondansetron, granisetron,
hydroxyzine, acetylleucine monoethanolamine, alizapride, azasetron, benzquinamide,
bietanautine, bromopride, buclizine, clebopride, cyclizine, dimenhydrinate, diphenidol,
dolasetron, meclizine, methallatal, metopimazine, nabilone, oxyperndyl, pipamazine,
scopolamine, sulpiride, tetrahydrocannabinol, thiethylperazine, thioproperazine, tropisetron,
or mixtures thereof.
[0717] A Purine Derivative and the other therapeutic agent can act additively or, in one
embodiment, synergistically. In one embodiment, a Purine Derivative is adminsitered
concurrently with another therapeutic agent. In one embodiment, a composition comprising
an effective amount of a Purine Derivative and an effective amount of another therapeutic
agent can be administered. Alternatively, a composition comprising an effective amount
of a Purine Derivative and a different composition comprising an effective amount
of another therapeutic agent can be concurrently administered. In another embodiment,
an effective amount of a Purine Derivative is administered prior or subsequent to
administration of an effective amount of another therapeutic agent. In this embodiment,
the Purine Derivative is administered while the other therapeutic agent exerts its
therapeutic effect, or the other therapeutic agent is administered while the Purine
Derivative exerts its preventative or therapeutic effect for use in treating or preventing
a Condition, reducing an animal's rate of metabolism or protecting an animal's heart
against myocardial damage during cardioplegia.
[0718] A composition of the invention can be prepared using a method comprising admixing
a Purine Derivative and a physiologically acceptable carrier or excipient. Admixing
can be accomplished using methods well known for admixing a compound (or salt) and
a physiologically acceptable carrier or excipient.
5.6 THERAPEUTIC OR PROPHYLACTIC USES OF THE PURINE DERIVATIVES
5.6.1 TREATMENT OR PREVENTION OF A CARDIOVASCULAR DISEASE
[0719] A cardiovascular disease can be treated or prevented by administration of an effective
amount of a Purine Derivative.
[0720] Cardiovascular diseases that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to, atherosclerosis, congestive
heart failure, circulatory shock, cardiomyopathy, cardiac transplant, cardioplegia,
and a cardiac arrhythmia.
[0721] In one embodiment, the cardiovascular disease is a cardiac arrhythmia, congestive
heart failure, circulatory shock or cardiomyopathy.
[0722] In one embodiment, the cardiac arrhthmia is a tachycardia or an an idiotopic arrhythmia.
[0723] In another embodiment, the methods for treating a cardiovascular disease are useful
for converting a cardiac arrhythmia to a normal sinus rhythm.
[0724] In still another embodiment, the tachycardia is atrial fibrillation, supraventricular
tachycardia, atrial flutter, paroxysmal supraventricular tachycardia, paroxysmal atrial
tachycardia, sinus tachycardia, atrioventricular nodal reentry tachycardia, or tachycardia
caused by Wolff-Parkinson-White Syndrome.
[0725] In a further embodiment, the uses of Purine Derivatives for treating a tachycardia
are useful for lowering the animal's ventricular rate to a rate of not less than about
40 beats per minute. In a specific embodiment, the methods are useful for lowering
an animal's ventricular rate to a rate of from about 60 beats per minute to about
100 beats per minute.
5.6.2 PROTECTING AN ANIMALS HEART AGAINST MYOCARDIAL DAMAGE DURING CARDIOPLEGIA
[0726] In one embodiment, the invention provides uses of a cardioplegia-inducing agent and
a Purine Derivative for the preparation of a medicament for inducing cardioplegia.
Cardioplegia-inducing agents useful in the present invention include, but are not
limited to, potassium chloride, procaine, lidocaine, novocaine, bupivocaine, nicorandil,
pinacidil, halothane, St. Thomas solution, Fremes solution, 2,3-butanedione monoxime,
and esmolol.
[0727] In one embodiment, the cardioplegia-inducing agent is lidocaine.
[0728] In one embodiment, a cardioplegia-inducing agent and a Purine Derivative are present
within the same composition. The present methods for inducing cardioplegia are useful
for preventing or minimizing myocardial damage from occurring during cardioplegia.
[0729] In still another embodiment, the invention provides uses of Purine derivatives use
for protecting an animal's heart against myocardial damage during cardioplegia, the
comprising administering to an animal in need thereof an effective amount of:
- (a) a cardioplegia-inducing agent; and
- (b) a Purine Derivative.
[0730] In one embodiment, the cardioplegia-inducing agent is administered prior to the administration
of the Purine Derivative.
[0731] In another embodiment, Purine Derivative is administered prior to the administration
of the cardioplegia-inducing agent.
[0732] In a further embodiment, the cardioplegia-inducing agent and the Purine Derivative
are administered concurrently.
[0733] In another embodiment, the cardioplegia-inducing agent and the Purine Derivative
are administered such that the Purine Derivative exerts its prophylactic effect of
protection against myocardial damage while the cardioplegia-inducing agent exerts
its cardioplegic effect.
5.6.3 TREATMENT OR PREVENTION OF A NEUROLOGICAL DISORDER
[0734] A neurological disorder can be treated or prevented by administration of an effective
amount of a Purine Derivative.
[0735] Neurological disorders that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to, a seizure disorder,
such as epilepsy;
pain, including acute postoperative pain, cancer pain, neuropathic pain, pain resulting
from surgery, labor pain during childbirth, a psychogenic pain syndrome, and headache,
including migraine headache and cluster headache; delirium and dementia, such as Lewy
body dementia, Alzheimer's disease, Pick's disease, or a Creutzfeldt-Jakob disease;
a sleep disorder, such as insomnia, hypersomnia, a sleep apnea syndrome, restless-leg
syndrome, or a parasomnia; a cranial nerve disorder, such as Bell's palsy; a disorder
of movement, such as tremor, dystonia, Tourette's Syndrome, myoclonus, Huntington's
disease, cortico basal degeneration, chorea, a drug-induced movement disorder, progressive
supranuclear palsy, Parkinson's disease, or a Parkinsonian Syndrome, such as multiple
system atrophy, Wilson's disease or mult-infarct state; a demyelinating disease, such
as multiple sclerosis or amyotrophic lateral sclerosis; a neuro-muscular disease,
such as muscular dystrophy; a cerebrovascular disease, such as stroke; a neuroopthalmic
disorder; and a psychiatric disorder, including but not limited to, somatoform disorders,
such as hypochondriasis or body dysmorphic disorder; dissociation disorders, such
as panic disorder, phobic disorders, or obsessive-compulsive disorders; mood disorders,
such as depression or bipolar disorders; personality disorders; psychosexual disorders;
suicidal behavior; schizophrenia; brief psychotic disorder; and delusional disorder.
[0736] In one embodiment, the neurological disorder treated or prevented is epilepsy, pain,
or stroke.
[0737] In one embodiment, the present uses of Purine Derivatives for treating pain further
comprise the administration of an additional analgesic agent. In a specific embodiment,
the additional analgesic agent is buprenorphine.
5.6.4 TREATMENT OR PREVENTION OF AN ISCHEMIC CONDITION
[0738] An ischemic condition can be treated or prevented by administration of an effective
amount of a Purine Derivative.
[0739] Ischemic conditions that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to, stable angina, unstable
angina, myocardial ischemia, hepatic ischemia, mesenteric artery ischemia, intestinal
ischemia, myocardial infarction, critical limb ischemia, chronic critical limb ischemia,
erebral ischemia, acute cardiac ischemia, and an ischemic disease of the central nervous
system, such as stroke or cerebral ischemia.
[0740] In one embodiment, the ischemic condition is myocardial ischemia, stable angina,
unstable angina, stroke, ischemic heart disease or cerebral ischemia.
5.6.5 TREATMENT OR PREVENTION OF A REPERFUSION INJURY
[0741] A reperfusion injury can be treated or prevented by administration of an effective
amount of a Purine Derivative. Reperfusion injury can result following a naturally
occurring episode, such as a myocardial infarction or stroke, or during a surgical
procedure where blood flow in vessels is intentionally or unintentionally blocked.
[0742] Reperfusion injuries that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to, intestinal reperfusion
injury, myocardial reperfusion injury; and reperfusion injury resulting from cardiopulmonary
bypass surgery, thoracoabrominal aneurysm repair surgery, carotid endaretectomy surgery,
or hemorrhagic shock.
[0743] In one embodiment, the reperfusion injury results from cardiopulmonary bypass surgery,
thoracoabrominal aneurysm repair surgery, carotid endarerectomy surgery or hemorrhagic
shock.
5.6.6 TREATMENT OR PREVENTION OF DIABETES
[0744] Diabetes can be treated or prevented by administration of an effective amount of
a Purine Derivative.
[0745] Types of diabetes that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to, Type I diabetes (Insulin
Dependent Diabetes Mellitus), Type II diabetes (Non-Insulin Dependent Diabetes Mellitus),
gestational diabetes, insulinopathy, diabetes due to pancreatic disease, diabetes
associated with another endocrine disease (such as Cushing's Syndrome, acromegaly,
pheochromocytoma, glucagonoma, primary aldosteronism or somatostatinoma), Type A insulin
resistance syndrome, Type B insulin resistance syndrome, lipatrophic diabetes, and
diabetes induced by β-cell toxins.
[0746] In one embodiment, the diabetes is Type I diabetes mellitus.
[0747] In another embodiment, the diabetes is Type II diabetes mellitus.
5.6.7 METHODS FOR REDUCING AN ANIMAL'S RATE OF METABOLISM
[0748] In one embodiment, the invention provides uses of Purine derivatives for reducing
an animal's rate of metabolism comprising administering to an animal in need thereof
an amount of a Purine Derivative that is effective to slow the animal's rate of metabolism.
[0749] Reducing an animal's rate of metabolism is useful for slowing an animal's heart rate
during heart surgery; protecting an animal's tissue from damage during surgery, particular
heart or brain surgery; reducing intracranial hypertension caused by brain injury
in an animal; or inducing hibernation in an animal.
[0750] Accordingly, the present invention encompasses uses of Purine Derivatives for slowing
an animal's heart rate during heart surgery; protecting an animal's tissue from damage
during surgery, particular heart or brain surgery; reducing intracranial hypertension
caused by brain injury in an animal; or inducing hibernation in an animal, the uses
comprising administering an effective amount of a Purine Derivative to an animal in
need thereof.
[0751] Reducing an animal's rate of metabolism is also useful for reducing an animal's rate
of oxygen consumption. Accordingly, the present invention provides uses of Purine
derivatives for reducing the rate of an animal's oxygen consumption, the method comprising
administering to an animal in need thereof an amount of a Purine Derivative that is
effective to reduce the animal's rate of oxygen consumption. An animal's oxygen supply
might be compromised due to: (i) a medical procedure, such as heart surgery, brain
surgery, organ transplantation, mechanical occlusion of the vascular supply, or vascular
stenosis; (ii) a disorder or medical condition such as ischemia, a respiratory disorder,
respiratory failure, a pulmonary disorder, anemia, anaphylactic shock, hemmorhagic
shock, dehydration, compartment syndrome, intravascular thrombus, septic shock, cystic
fibrosis, lung cancer, stroke, a burn, or internal bleeding; (iii) an injury such
as drowning, a crush injury to one or more limbs, choking, or suffocation; (iv) a
compromised airway due to asthma, a tumor, a lung injury or a tracheal injury; (v)
an external compression of one or more blood vessels; or (vi) an intrinsic obstruction
of one or more blood vessels. Reducing an animal's rate of oxygen consumption is useful
for treating or preventing tissue damage or stroke, resulting from an inadequate supply
of oxygen to a cell, a tissue, an organ or an organ system.
[0752] In one embodiment, an animal's rate of oxygen consumption is reduced to increase
emergency recussitation in an injured animal.
[0753] In another embodiment, an animal's rate of oxygen consumption is reduced prior to
and during heart surgery. In a specific embodiment, the animal is a human child undergoing
pediatric heart surgery.
[0754] In another embodiment, a animal's rate of oxygen consumption is reduced to treat
respiratory failure in an animal.
[0755] In one embodiment, an animal's rate of oxygen consumption is reduced to aid tissue
metabolism in an animal whose respiration and ventilation is facilitated by a ventilator.
In a specific embodiment, the animal whose respiration and ventilation is facilitated
by a ventilator is a geriatric human. In another specific embodiment, the animal whose
respiration and ventilation is facilitated by a ventilator is a premature human infant.
[0756] In one embodiment, an organ can be stored
ex vivo in a composition comprising an effective amount of a Purine Derivative. The composition
is useful for preserving an organ's viability after being removed from a donor and
before the organ is transplanted in a recipient. In one embodiment, the donor and
recipient are the same.
[0757] In another embodiment, an effective amount of a Purine Derivative can be administered
to an animal awaiting organ transplantation to reduce the animal's rate of oxygen
consumption prior to or during organ transplantation.
[0758] Reducing an animal's rate of metabolism is also useful for reducing an animal's core
body temperature. Accordingly, the present invention provides uses of Purine derivatives
for reducing an animal's core body temperature, the use comprising administering to
an animal in need thereof an amount of a Purine Derivative that is effective to reduce
the animal's core body temperature.
[0759] In one embodiment, the animal's core body temperature is reduced to a temperature
from about 4 °C to about 34 °C. In certain embodiments, the animal's core body temperature
is reduced to about 34 °C, to about 30 °C, to about 25 °C, to about 20 °C, to about
15 °C, to about 10 °C, or to about 4 °C.
[0760] In a specific embodiment, an animal's core body temperature is reduced to induce
therapeutic hypothermia.
5.6.8 TREATMENT OR PREVENTION OF OBESITY
[0761] Obesity can be treated or prevented by administration of an effective amount of a
Purine Derivative.
[0762] Types of obesity that can be treated or prevented by administering an effective amount
of a Purine Derivative include, but are not limited to, android obesity, gynoid obesity,
abdominal obesity, age-related obesity, diet-induced obesity, fat-induced obesity,
hypothalamic obesity, morbid obesity, multigenic obesity, and visceral obesity.
[0763] In one embodiment, the obesity is android obesity.
5.6.9 TREATMENT OR PREVENTION OF A WASTING DISEASE
[0764] In one embodiment, the invention provides uses of Purine Derivatives for treating
or preventing a wasting disease, comprising administering to an animal in need thereof
an amount of a a Purine Derivative that is effective to treat or prevent the wasting
disease.
[0765] Types of wasting diseases that can be treated or prevented by administering an effective
amount of a Purine Derivative include, but are not limited to chronic wasting disease,
cancer wasting syndrome, and AIDS wasting syndrome.
6. EXAMPLES
[0766] Materials: [
3H]NECA was obtained from Du Pont NEN, Dreieich, Germany. Other unlabeled adenosine
receptor agonists and antogonists can be obtained from RBI, Natick, Massachusetts.
The 96-well microplate filtration system (MultiScreen MAFC) was obtained from Millipore,
Eschborn, Germany. Penicillin (100 U/mL), streptomycin (100 µg/mL), L-glutamine and
G-418 were obtained from Gibco-Life Technologies, Eggenstein, Germany. Other materials
can be obtained as described in
Klotz et al., J. Biol. Chem., 260:14659-14664, 1985;
Lohse et al., Naunyn-Schmiedeberg's Arch. Pharmacol., 336:204-210, 1987; and
Klotz et al., Naunyn-Schmiedeberg's Arch. Pharmacol., 357:1-9, 1998.
[0767] General Methods: Proton nuclear magnetic resonance (NMR) spectra were obtained from Varian 300 MHz
spectrophotometer and chemical shifts are reported in parts per million. Compounds
were characterized on the basis of NMR and Mass spectral (MS) data. 6-Chloroadenosine
and 2',3',5'-triacetoxy-2,6-dichloroadenosine were purchased from TRC, Ontario, Canada.
2',3'-Isopropylideneadenosine and 2-chloroadenosine were purchased from ACROS Organic,
USA.
6.1 Example 1
Synthesis of Compound 16
[0768]

[0769] 2-Chloro-N6-cyclopentyladenosine - 2',3',5'-triacetoxy-2,6-dichloroadenosine (1.5 g) and cyclopentylamine (8 eq.) were
diluted with ethanol (50 eq.) and the resulting solution was heated at reflux for
about 15 hours, then cooled to room temperature and concentrated in vacuo to provide
a crude residue which was diluted with a mixture of ethyl acetate and water and transferred
to a separatory funnel. The organic layer was separated, dried over sodium sulfate
and concentrated in vacuo to provide a crude residue which was purified using flash
column chromatography on silica gel (8% MeOH - dichloromethane as eluent) to provide
2-chloro-N
6-cyclopentyladenosine (0.948 g). MS
m/
z 370.32 [M + H]
+.
[0770] 2',3'-Isopropylidene-2-chloro-N6-cyclopentyladenosine: 2-chloro-N
6-cyclopentyladenosine (900 mg, as prepared in the previous step) and 2,2-dimethoxypropane
(10 eq.) were diluted with acetone (15 mL) and to the resulting solution was added
D-camphorsulphonic acid (1 eq) and the resulting reaction was allowed to stir at room
temperature for 2 hr. The resulting reaction mixture was concentrated in vacuo, diluted
with a mixture of saturated aqueous NaHCO
3 and ethyl acetate, and transferred to a separatory funnel. The organic layer was
separated, dried over sodium sulfate and concentrated in vacuo to provide a crude
residue which was purified using flash column chromatography on silica gel (using
5% MeOH - dichloromethane as eluent) to provide 2',3'-Isopropylidene-2-chloro-N
6-cyclopentyladenosine (0.905 g).
1H NMR (CDCl
3, 300 MHz): δ 1.36 (s, 3H), 1.62 (s, 3H), 1.66 - 2.16 (m, 9H), 3.78 (d, J = 12.9 Hz,
1H), 3.98 (d, J = 12.9 Hz, 1H), 4.51 (bs, 1H), 4.55 - 4.60 (m, 1H), 5.09 - 5.17 (m,
2H), 5.81 (bs, 1H), 7.25 (s, 1H), 7.89 (s, 1H).
[0771] 2',3'-Isopropylidene-2-chloro-N6-cyclopentyladenosine-5'-nitrate: A solution of nitric acid (2.0 mL, 60%) was added slowly over a period of 30 minutes
to acetic anhydride (16.0 mL) at -10 to 10 °C (using acetonitrile-CO
2 cooling bath) and the reaction mixture was allowed to stir at -10 to 10 °C for 10
minutes. The reaction mixture was then cooled to -30 °C and then a solution of 2',3'-Isopropylidene-2-chloro-N
6-cyclopentyladenosine (655 mg, 0.0016 mol, as prepared in the previous step) in acetic
anhydride (8.0 mL) was added slowly. When addition was complete, the resulting reaction
was allowed to warm to -5 °C and monitored using TLC (solvent 5% MeOH-CH
2Cl
2 or 70% EtOAc-hexane). When the reaction was complete, the reaction mixture was poured
slowly into an ice cold mixture of saturated aqueous NaHCO
3 (300 equivalent in 75 mL water) and ethyl acetate (60 mL). The organic layer was
separated and the aqueous layer was back extracted with ethyl acetate. The combined
organic layers were washed with water, dried over sodium sulfate, and concentrated
in vacuo to provide a crude residue. The crude residue was purified using flash column
column (5% methanol-dichloromethane as eluent) to provide 2',3'-Isopropylidene-2-chloro-N
6-cyclopentyladenosine-5'-nitrate (0.435 g).
1H NMR (CDCl
3, 300 MHz): δ 1.38 (s, 3H), 1.59 (s, 3H), 1.66 - 2.13 (m, 9H), 4.50 - 4.55 (m, 1H),
4.71- 4.83 (m, 2H), 5.14 - 5.17 (m, 1H), 5.31 (d, J = 5.7 Hz, 1H), 6.04 (s, 1H), 7.24
(s, 1H), 7.81 (s, 1H). MS
m/
z 455.44 [M + H]
+.
[0772] Compound 16: 2',3'-Isopropylidene-2-chloro-N
6-cyclopentyladenosine-5'-nitrate (0.435 g, as prepared in the previous step) was diluted
with TFA (20 mL) and water (5 mL) and the resulting solution was allowed to stir for
30 minutes. The resulting reaction mixture was concentrated in vacuo and the resulting
residue was diluted with water (10 mL) and the resulting solution was concentrated
in vacuo. The crude residue obtained was diluted with ethyl acetate, transferred to
a separatory funnel, washed with saturated aqueous sodium bicarbonate, dried over
sodium sulfate and concentrated in vacuo. The crude residue obtained was purified
using flash column chromatography on silica gel (using 10% methanol-dichloromethane
as eluent) to provide Compound
16 (0.250 g).
1H NMR (DMSO-d
6, 300 MHz): δ 1.52 -1.95 (m, 9H), 4.13 - 4.24 (m, 2H), 4.55 - 4.58 (m, 1H), 4.73 -
4.85 (m, 2H), 5.50 (bs, 1H), 5.61 (bs, 1H), 5.84 (d, J = 5.1 Hz, 1H), 8.33 (bs, 2H),
MS
m/
z 414.85 [M + H]
+.
6.2 Example 2
Synthesis of Compound 17
[0773]

[0774] N6-Cyclopentyladenosine: A solution of 6-chloroadenosine (43 g) and cyclopentylamine (5 eq.) in ethanol (50
eq.) was heated at reflux for 3 hours then cooled to room temperature. The resultant
reaction mixture was concentrated
in vacuo and the resultant residue was diluted with water (400 ml) and ethyl acetate (400
ml). The eoganic layer was separated and the aqueous layer was extracted into ethyl
acetate (2 x 400 ml). The combined organic layers were washed with water (2 x 200
ml), dried over sodium sulfate, concentrated
in vacuo and dried under vacuum to provide a solid which was suspended in MeOH (400 mL), filtered
and dried to provide N
6-cyclopentyladenosine (43.8 g).
[0775] 2',3'-isopropylidene-N6-cyclopentyladenosine: N
6-cyclopentyladenosine (43 g) was diluted with acetone (75 eq.) and to the resultant
solution was added 2,2-dimethoxypropane (5 eq.), followed by D-camphorsulphonic acid
(1 eq) and the resultant reaction was allowed to stir at room temperature for 3 hours.
The resultant reaction mixture was concentrated
in vacuo and the resultant residue was diluted with ethyl acetate, then neutralized to pH
7.0 using concentrated aqueous NaHCO
3. The organic layer was separated, dried over sodium sulfate, concentrated
in vacuo and dried under vacuum to provide a solid which was suspended in hexane (250 mL),
filtered, washed with hexane and dried under vacuum to provide 2',3'-isopropylidene-N
6-cyclopentyl adenosine (43 g).
[0776] 2',3'-isopropylidene-N6-cyclopentyladenosine-5'-nitrate: Acetic anhydride (22 eq) was slowly added to a stirred solution of nitric acid (5
eq., 63%) at -10° C (acetonitrile-CO
2 bath used for cooling) over a period of 4 hours with the reaction temperature maintained
at -5 to 5° C during the addition. The resultant solution was cooled to -20° C and
a solution of 2',3'-isopropylidene-N
6-cyclopentyladenosine (18.250 gm, 0.048 mol) in acetic anhydride (37 mL, 8 eq.) was
added slowly. The resultant reaction was allowed to stir at -15 to -5° C for 1 hour
and the resultant reaction mixture was slowly poured slowly into an ice-cold solution
of aqueous NaHCO
3 (168 gm in 800 mL water) and ethyl acetate (350 mL) and the resultant solution was
allowed to stir for 5 minutes. The organic layer was separated and the aqueous layer
was extracted using ethyl acetate (350 mL). The combined organic layers were washed
with water, and dried over sodium sulfate, concentrated
in vacuo and purified using flash column chromatograpy on silica gel using 70% ethyl acetate-hexane
as eluent to provide 2',3'-isopropylidene-N
6-cyclopentyladenosine-5'-nitrate (14.9 g).
[0777] Compound 17: 2',3'-isopropylidene-N
6-cyclopentyladenosine-5'-nitrate (4.8 g) was diluted with a mixture of TFA (20 mL)
and water (5 mL) and the resultant reaction was allowed to stir for 30 minutes at
room temperature. The resultant reaction mixture was concentrated
in vacuo and the resultant residue was diluted with water (10 mL) and concentrated
in vacuo. The resultant residue was diluted with ethyl acetate and washed with saturated aqueous
sodium bicarbonate, and the organic layer was dried over sodium sulfate and concentrated
in vacuo to provide a white solid residue which was dried under vacuum and then recrystalized
from cold ethanol to provide Compound 17 (3.1 gm).
1H-NMR (DMSO-d
6): δ 1.49 -1.58 (m, 4H), 1.66 -1.72 (m, 2H), 1.89 -1.94 (m, 2H), 4.12 - 4.17 (m, 1H),
4.28 - 4.33 (m, 1H), 4.48 (bs, 1H), 4.65 - 4.87 (m, 3H), 5.5 (d, J = 5.1 Hz, 1H),
5.63 (d, J = 5.7 Hz, 1H), 5.91 (d, J = 5.1 Hz, 1H), 7,75 (d, J = 7.5 Hz, 1H), 8.17
(bs, 1H), 8.30 (s, 1H); MS (ES
+): m/z 381.35 (M+ 1); Anal. Calcd for C
15H
20N
6O
6: C, 47.37; H, 5.30; N, 22.10; Found: C, 47.49; H, 5.12, N, 21.96.
6.3 Example 3
Synthesis of Compound 18
[0778]

[0779] 2',3'-Isopropylidene-adenosine: A solution of adenosine (43 g) and 2,2-dimethoxypropane (5 eq.) in acetone (75 eq.)
was treated with D-camphorsulphonic acid (1 eq) at and the resulting reaction was
allowed to stir for 3 hr. The reaction mixture was concentrated in vacuo and diluted
with a mixture of saturated aqueous NaHCO
3 (250 mL) and ethyl acetate (250 mL). The resulting solution was transferred to a
separatory funnel and the organic layer was separated, dried over sodium sulfate,
and concentrated in vacuo to provide a solid residue. The solid residue was suspended
in hexane, filtered, washed with hexane and dried to provide 2',3'-Isopropylidene-adenosine
(43 g).
1H NMR (DMSO-d
6, 300 MHz): δ 4.12 - 4.17 (m, 1H), 4.22 - 4.26 (m, 1H), 4.59 (d, J = 4.8 Hz, 1H),
4.74 - 4.85 (m, 2H), 5.49 - 5.52 (m, 1H), 5.51 (d, J = 5.1 Hz, 1H), 5.84 (d, J = 5.1
Hz, 1H), 7.85 (s, 2H), 8.33 (s, 1H). MS
m/
z 347.11 [M + H]
+.
[0780] 2',3'-Isopropylidene-adenosine -5'-nitrate: A solution of nitric acid (19.8 mL, 60%) was added slowly over a period of 30 minutes
to acetic anhydride (100 mL) at -10 to 10 °C (using acetonitrile-CO
2 cooling bath) and the reaction mixture was allowed to stir at - 10 to 10 °C for 10
minutes. The reaction mixture was then cooled to -30 °C and then a solution of 2',3'-Isopropylidene-adenosine
(5.945 g, as prepared in the previous step) in acetic anhydride (49.3 mL) was added
slowly. When addition was complete, the resulting reaction was allowed to warm to
-5 °C and monitored using TLC (solvent 5% MeOH-CH
2Cl
2 or 70% EtOAc-hexane). When the reaction was complete, the reaction mixture was poured
slowly into an ice cold mixture of saturated aqueous NaHCO
3 (300 equivalent in 500 mL water) and ethyl acetate (250 mL). The organic layer was
separated and the aqueous layer was back extracted with ethyl acetate. The combined
organic layers were washed with water, dried over sodium sulfate, and concentrated
in vacuo to provide a crude residue. The crude residue was purified using flash column
column (5% methanol-dichloromethane as eluent) to provide 2',3'-Isopropylidene-adenosine-5'-nitrate
(4.850 g).
1H NMR (DMSO-d
6, 300 MHz): δ 1.31 (s, 3H), 1.52 (s, 3H), 1.53 - 1.96 (m, 9H), 4.41- 4.43 (m, 1H),
4.68 - 4.74 (m, 1H), 4.80 - 4.86 (m, 1H), 5.14 - 5.16 (m, 1H), 5.41 (d, J = 6 Hz,
1H), 6.23 (s, 1H), 7.80 (s, 1H), 8.21 (s, 1H), 8.29 (s, 1H). MS
m/
z 421.09 [M + H]
+.
[0781] Compound 18: 2',3'-Isopropylidene-adenosine-5'-nitrate (4.8 g, as prepared in the previous step)
was diluted with 4:1 mixture of TFA (20 mL) and water (5 mL) and the resulting solution
was allowed to stir at rt for 30 minutes. The resulting reaction mixture was concentrated
in vacuo and the resulting residue was diluted with water (10 mL) and concentrated
in vacuo to provide a residue which was diluted with ethyl acetate (20 mL). The resulting
solution was washed with saturated aqueous sodium bicarbonate, dried over sodium sulfate
and concentrated in vacuo to provide a white solid residue which was further dried
in vacuo and then recrystallized from ethanol to provide Compound 18 (3.1 g).
1H NMR (DMSO-d
6, 300 MHz): δ 1.53 - 1.96 (m, 9H), 4.12 - 4.17 (m, 1H), 4.28 - 4.3 3 (m, 1H), 4.65
- 4.70 (m, 1H), 4.74 - 4.87 (m, 1H), 5.50 (d, J = 5.1 Hz, 1H), 5.62 (d, J = 5.7 Hz,
1H), 5.90 (d, J = 5.1 Hz, 1H), 7.74 (d, J = 7.5 Hz, 1H), 8.17 (s, 1H), 8.30 (s, 1H).
MS
m/
z 381.04 [M + H]
+.
6.4 Example 4
Synthesis of Compound 19
[0782]

[0783] Using the method described in Example 3 and using commercially available 2-chloroadenosine
in place of adenosine in step 1, Compound 19 was prepared.
6.5 Example 5
Synthesis of Compound 21
[0784]

[0785] N6-Hydrazinoadenosine: A mixture of 6-chloroadenosine (1 g, 3.5 mmol) and hydrazine monohydrate (5 mL) in
MeOH (10 mL) was stirred at 50 °C for 1 hr. The reaction mixture was allowed to cool
to room tempearature and was then concentrated
in vacuo to provide a crude residue which was suspended in MeOH and (10 mL) and stirred at
room temperature. The solid product that separated out from the suspension was filtered,
washed with MeOH and dried
in vacuo to provide N
6-hydrazinoadenosine (970 mg) which was used without further purification.
[0786] Compound 21: A suspension of N
6-hydrazinoadenosine (50 mg, prepared as described in the previous step) and cyclopentanealdehyde
(0.26 mmol) in methanol (5 mL) was heated at reflux for 15 minutes and the reaction
mixture was cooled to room temperature, then concentrated
in vacuo to provide a crude residue which was purified using silica gel flash chromatography
(10% methanol/dichloromethane eluent) to provide compound 21 (52 mg). MS
m/
z 363.11 [M + H]
+.
6.6 Example 6
Synthesis of Compound 22
[0787]

[0788] 2,6-Dihydrazinoadenosine: A mixture of 2,6-chloro-2',3'5'-triacetyladenosine (0.150 gm, 0.33 mmol) and hydrazine
monohydrate (2 mL) in MeOH (5 mL) was heated at reflux for about 8 hours. The reaction
mixture was cooled to room temperature and concentrated
in vacuo, and the resulting residue was suspended in MeOH (5 mL) and stirred at room temperature
for 1 hour. The solid product which separated out from the suspension was filtered,
washed with MeOH and dried
in vacuo to provide 2,6-dihydrazinoadenosine (65mg), which was used without further purification.
[0789] Compound 22: A mixture of 2,6-dihydrazinoadenosine (60 mg, prepared as described in the previous
step) and cyclopentanaldehyde (0.1 mL) in methanol (5 mL) was was heated at reflux
for 15 minutes. The reaction mixture was then cooled to room temperature and concentrated
in vacuo to provide a crude residue which was purified using silica gel flash chromatography
(10% methanol/dichloromethane eluent) to provide compound 22 (48 mg). MS
m/
z 473.25 [M + H]
+.
6.7 Example 7
Synthesis of Compound 23 (sodium salt)
[0790]

[0791] A mixture of 2',3'-isopropylidene-N
6-cyclopentyladenosine (1 g, 0.0026 mol, prepared as set forth in Example 1) and sulfur
trioxide-pyridine complex (0.0039 mol) in DMF (17 mL) was stirred at room temperature
for about 18 hours. The DMF was removed
in vacuo and the resulting residue was dried
in vacuo. The dried residue was diluted with water (25 mL), neutralized to pH 7.0 using NaOH
(1N) and concentrated
in vacuo to provide a crude residue which was diluted with an solution of TFA (80% solution
in water, 50 mL). The resulting solution was allowed to stir at 25 °C for 30 minutes
and the reaction mixture was concentrated
in vacuo to afford a crude residue which was diluted with water (10 mL) and concentrated
in vacuo. The crude compound obtained was recrystallized from acetone - water to provide compound
23 (sodium salt) (805 mg).
1HMNR (DMSO-d
6, 300 MHz): 1.53 - 1.96 (m, 9H), 3.78 - 4.10 (m, 4H), 4.43 - 4.54 (m, 2H), 5.90 (d,
J = 5.1 Hz, 1H), 8.23 (s, 1H), 8.46 (s, 1H). MS
m/
z 416.20 [M + H]
+.
6.8 Example 8
Synthesis of Compound 24 (sodium salt)
[0792]

[0793] Using the method described in Example 8 and substituting 2',3'-isopropylidene-adenosine
(prepared as set forth in Example 3) for 2',3'-isopropylidene-N
6-cyclopentyladenosine, Compound
24 (sodium salt) was prepared.
1HMNR (DMSO-d
6, 300 MHz): 3.83 - 3.99 (m, 2H), 4.10 - 4.14 (m, 2H), 4.50 - 4.54 (m, 1H), 5.94 (d,
J = 6 Hz, 1H), 8.5 (s, 1H), 8.73 (s, 1H), 9.50 (bs, 2H). MS
m/
z 348.05 [M + H]
+.
6.9 Example 9
Cell culture and membrane preparation
[0794] CHO cells stably transfected with human adenosine A
1 receptor were grown and maintained in Dulbecco's Modified Eagles Medium with nutrient
mixture F12 (DMEM/F12) without nucleosides, containing 10% fetal calf serum, penicillin
(100 U/mL), streptomycin (100 µg/mL), L-glutamine (2 mM) and Geneticin (G-418, 0.2
mg/mL; A
2B, 0.5 mg/mL) at 37°C in 5% CO
2/95% air. Cells were then split 2 or 3 times weekly at a ratio of between 1:5 and
1:20.
[0795] Membranes for radioligand binding experiments were prepared from fresh or frozen
cells as described in
Klotz et al., Naunyn-Schmiedeberg's Arch. Pharmacol., 357:1-9 (1998). The cell suspension was then homogenized in ice-cold hypotonic buffer (5 mM Tris/HCl,
2 mM EDTA, pH 7.4) and the homogenate was spun for 10 minutes (4°C) at 1,000 g. The
membranes were then sedimented from the supernatant for 30 minutes at 100,000 g and
resuspended in 50 mM Tris/HCl buffer pH 7.4 (for A
3 adenosine receptors: 50 mM Tris/HCl, 10 mM MgCl
2, 1 mM EDTA, pH 8.25), frozen in liquid nitrogen at a protein concentration of 1-3
mg/mL and stored at - 80°C.
6.10 Example 10
Adenosine Receptor Binding Studies
[0796] The affinities of selected Purine Derivatives for the adenosine A
1 receptor were determined by measuring the displacement of specific [
3H] 2-chloro-N
6-cyclopentyl adenosine binding in CHO cells stably transfected with human recombinant
A
1 adenosine receptor expressed as Ki (nM).
[0797] Dissociation constants of unlabeled compounds (K
i-values) were determined in competition experiments in 96-well microplates using the
A
1 selective agonist 2-chloro-N
6-[
3H]cyclopentyladenosine ([
3H]CCPA, 1nM) for the characterization of A
1 receptor binding. Nonspecific binding was determined in the presence of 100 µM R-PIA
and 1 mM theophylline, respectively. For details see
Klotz et al., Naunyn-Schmiedeberg's Arch. Pharmacol., 357:1-9, 1998. All binding data were calculated by non-linear curve fitting using the program SCTFIT
(
De Lean et al. Mol. Pharm. 1982, 21:5-16).
[0798] Results are presented in Table 1 below and show that Compounds
16, 17, 18, 19, 23 (sodium salt), and
25, illustrative Purine Derivatives, are selective for the adenosine A
1 receptor and accordingly, are useful for treating a Condition, slowing an animal's
metabolic rate, or protecting an animal's heart against myocardial damage during cardioplegia.
Table 1
| Affinities of illustrative Purine Derivatives for human A1, A2A and A3 adenosine receptors |
| Compound |
Ki(A1)a (nM) |
Ki(A2A)b (nM) |
Ki(A3)c (nM) |
| CCPA |
0.83 |
2,270 |
42.3 |
| |
(0.55-1.25) |
(1,950-2,660) |
(32.1-55.8) |
| 16 |
2.63 |
4,190 |
513 |
| |
(2.04-3.38) |
(2,440-7,200) |
(367-715) |
| 17 |
0.97 |
4,692 |
704 |
| |
(0.80-1.17) |
(2,300-9,560) |
(400-1,240) |
| 18 |
5.79 |
951 |
216 |
| |
(4.73-7.10) |
(530-1,708) |
(132-350) |
| 19 |
7 |
10,000 |
900 |
| |
(5.14-9.23) |
(5,790-15,760) |
(445-1,890) |
| 23 |
4.05 |
9,113 |
1,020 |
| (sodium salt) |
(3.54-4.63) |
(5,510-15,100) |
(470-2,220) |
| 25 |
10.6 |
> 100,000 |
2020 |
| |
(6.77-16.70) |
|
(837-4870) |
aDisplacement of specific [3H]CCPA binding in CHO cells stably transfected with human recombinant A1 adenosine receptor, expressed as Ki (nM). bDisplacement of specific [3H]NECA binding in CHO cells stably transfected with human recombinant A2A adenosine receptor, expressed as Ki (nM).
cDisplacement of specific [3H]NECA binding in HEK cells stably transfected with human recombinant A3 adenosine receptor, expressed as Ki (nM). All data are geometric means with 95% confidence intervals in parantheses. |
6.11 Example 11
Effects of Compound 17 on septic shock
[0799] Male BALB/c mice (6-8 weeks of age) were used in studies investigating lipopolysaccharide-induced
cytokine production and survival. For cytokine production the mice were treated with
compound
17 (Oral administration of 0.03 mg/kg) orally by gavage 30 min before being subjected
to lipopolysaccharide (1 mg/kg i.p.) for 90 minutes, after this period blood was taken
and serum obtained for analysis. Serum was diluted 1:5 prior to being assayed for
cytokines using species-specific ELISA kits (R & D Systems) for the chemokine MIP-1α
and the cytokine TNF-α levels, which were expressed as pg/mL. For survival studies
mice were treated with compound
17 (Oral administration of 0.03 mg/kg) starting 30 mins prior to the mice being subjected
to lipopolysaccharide (55 mg/kg i.p.). The survival of the mice was followed over
72h and expressed as a percentage of surviving mice at each time point. Oral administration
of 0.03 mg/kg compound 17 delays lipopolysaccharide (60 mg/kg) induced mortality in
conscious mice. N=12-14 per group.
[0800] FIG. 1 shows that Compound
17, administered orally to BALB/c mice at a dose of 0.03 mg/kg, reduces lipopolysaccharide-induced
plasma TNF-α and MIP-1α production in the BALB/c mouse model.
[0801] FIG. 2 shows that Compound
17, administered orally to BALB/c mice at a dose of 0.03 mg/kg, reduces lipopolysaccharide-induced
mortality in the BALB/c mouse model.
[0802] The above example shows that Compound
17, an illustrative Purine Derivative, reduces lipopolysaccharide-induced plasma levels
of TNF-α and MIP-1α, and delays lipopolysaccharide-induced mortality in mice.
[0803] Accordingly, Compound
17 is useful for treating septic shock.
6.12 Example 12
Anti-arrhythmia effects of Compound 17
Heart perfusion
[0804] Male Sprague-Dawley rats (having a body weight of 250 to 300 g) were heparinized
using sodium heparin (1,000 U/kg i.p.), followed 10 minutes later by introduction
of anesthesia via intraperitoneal administration of sodium pentobarbital (40 mg/kg).
Once the animal was anesthetized, the thorax was opened, and the heart was rapidly
removed and perfused through the ascending aorta using Krebs-Ringer buffer consisting
of NaCl (118 mmol/liter), KCl (4.75 mmol/liter), KH
2PO
4 (1.18 mmol/liter), MgSO
4 (1.18 mmol/liter), CaCl
2 (2.5 mmol/liter), NaHCO
3 (25 mmol/liter), and glucose (11 mmol/liter). A mixture of 95% O
2 and 5% CO
2 at 37 °C was bubbled through the perfusate. The heart was initially perfused at a
constant pressure of 70 mm Hg. About 10 min after the constant pressure perfusion,
perfusion was switched to constant flow perfusion achieved using a microtube pump.
The perfusion pressure was maintained at the same level of constant pressure perfusion
by adjusting flow rate. Once the flow rate was determined, it was maintained throughout
the experiment. The hearts were stimulated by rectangular pulses at a rate of 5 Hz
and 2-millisecond duration and twice the diastolic threshold, delivered from a stimulus
isolation unit (ADInstruments Ltd, Australia).
Effect of compound 17 on ischemia-induced arrhythmias
[0805] Rat hearts were perfused at constant pressure of 70 mmHg without pacing as described
above. Bipolar epicardial electrocardiogram (ECG) was recorded by placing two electrodes
on the surface of right appendage and apex. A stainless steel cannula was used as
indifferent electrode. The ECG and heart rate were continuously monitored and data
were recorded using a PowerLab data acquisition system (ADInstruments Ltd, Australia)
in conjunction with a Macintosh computer, and analyzed using Chart.3 computer package.
After a 20-minute equilibration period, regional ischemia was induced by ligation
of the left anterior descending (LAD) coronary artery, and the ligature was released
30 minutes after occlusion. Compound
17 was applied interperfusate 10 minutes before LAD ligation and was present during
LAD ligation. Compound
17 was tested in this model at 10, 30 and 100 pM concentrations. The incidences of ventricular
tachycardia (VT) were almost same in control non-treated (12/12) and in treated hearts
(20/22). Incidence of ventricular fibrillation (VF) was 58% (7/12) in non-treated
hearts, and 9% (2/22) in treated hearts. The total duration of both VT and VF were
significantly shortened by compound
17 at concentrations of 30 and 100 pM.
[0806] FIG. 3 shows that Compound 17 reduces the duration of ischemia-induced arrhythmias
in isolated perfused rat hearts relative to a non-treated control group.
[0807] The above example shows that Compound
17, an illustrative Purine Derivative, reduces the incidence of ventricular fibrillation
and accordingly, is useful for treating a cardiac arrhythmia.
6.13 Example 13
Effect of compound 17 on function recovery after global ischemia/reperfusion
Effect of compound 17 on function recovery after ischemia/reperfusion
[0808] Rat hearts were initially perfused at a constant pressure of 70 mm Hg using the procedure
described above in section 6.12.1. After a 20 minutes stabilization period, hearts
were subjected to 30 minute no-flow ischemia followed by 40 minute reperfusion. In
treated hearts, Compound
17 was infused for 10 minutes prior to induction of ischemia. Compound
17 significantly improved +dp/dt
max after 30 minutes ischemia followed by 40 minutes of reperfusion at the concentration
of 1 nM. Thus, the A1 agonist compound was not only effective in reducing fibrillations
but was also effective in improving myocardial contractility (dp/dt) in a myocardial
ischemiareperfusion model in the perfused heart. This observation is in line with
data indicating the cardioprotective effect of A1 agonism in various models of ischemia
and reperfusion (e.g. Roscoe et al., 2000; Jacobson et al., 2000; Lee et al., 2003),
and the cardioprotective effect of A1 agonists in vitro (Goldenberg et al., 2003)
and in vivo (Baxter et al., 2001; Donato et al., 2003; Kopecky et al., 2003; Kehl
et al., 2003; Arora et al., 2003; Regan et al., 2003; Yang et al., 2003).
Effect of compound 12 (1 nM) on maximal rates of development of left ventricular pressure
(+dP/dt
max) after 30 minutes of ischemia followed by 40 minutes of reperfusion.
*P < 0.05 when compared with the value of control.
[0809] FIG. 4 shows that Compound 17 is useful in exerting a cardioprotective effect following
ischemia and reperfusion.
[0810] The above example shows that Compound
17, an illustrative Purine Derivative, is effective for reducing fibrillations and improving
myocardial contractility following ischemia and reperfusion, and accordingly, is useful
in treating an ischemic condition or a reperfusion injury.
6.14 Example 14
Synthesis of Compound 25
[0811]

[0812] 2',3'-Isopropylidene-N6-(R)-(3-tetrahydrofuranyl) adenosine: 2',3'-isopropylidene-6-chloroadenosine (0.750 gm, 0.0023 mol) was diluted with ethanol
(20 mL) and to the resultant solution was added
R-(3-aminotetrahydrofuranylamine·MeSO
3H (0.630 gm, 0.0035 mol), followed by triethylamine (0.9 mL). The resultant reaction
was heated at refluxed for 2 days, then cooled to room temperature and the resultant
reaction mixture was concentrated
in vacuo, diluted with water (25 mL) and ethyl acetate (25 mL), and transferred to a separatory
funnel. The organic layer was separated, dried over sodium sulfate and concentrated
in vacuo to provide a crude residue which was recrystalized from EtOAc-hexane to provide 2',3'-Isopropylidene-N
6-(
R)-(3-tetrahydrofuranyl) adenosine (0.680 gm).
[0813] N6-(R)-(3-Tetrahydrofuranyl) adenosine: Acetic anhydride (4.6 mL, 30 eq.) was slowly added over a period of about 20 minutes
to a stirring solution of nitric acid (0.8 mL, 63% purchased from ACROS) which had
been precooled to about -5 °C using an acetonitrile-CO
2 bath. The initial reaction is vigorous and addition should be done very carefully
to avoid the increase in temperature. After addition of acetic anhydride is complete,
the resultant solution was was cooled to -20 °C and 2',3'-isopropylidene-N
6-R-(3-tetrahydrofuranyl)-adenosine (0.605, 0.0016 mol) was added. The resultant reaction
was monitored using thin-layer chromatography (solvent 5% MeOH-CH
2Cl
2 or 70% EtOAc-hexane). When the reaction was complete, the reaction mixture was poured
slowly into a cold solution of NaHCO
3 (100 mL) and the resultatnt solution was diluted with ethyl acetate (100 mL), allowed
to stir for 5 minutes, then transferred to a separatory funnel. The organic layer
was collected and the aqueous layer was extracted with ethyl acetate (50 mL). The
combined organic layers were then washed with water, dried over sodium sulfate, and
concentrated
in vacuo to afford a crude residue. The crude residue was diluted with TFA (16 mL) and water
(4 mL) and the resultant solution was allowed to stir at room temperature for 30 minutes,
then concentrated in vacuo. The resultant residue was diluted with water and concentrated
in vivo to afford a crude product which was purified using flash column chromatograpy
on silica gel using 10% methanol-dichloromethane to provide Compound 25 (265 mg).
1H-NMR (DMSO-d
6): δ 1.97 - 2.10 (m, 1H), 2.12 - 2.20 (m, 1H), 3.57 - 3.61 (dd, J = 4.8 and 4.5 Hz,
1H), 3.67 - 3.74 (dd, J = 8.1 and 8.1 Hz, 1H), 3.81- 3.92 (m, 2H), 4.12 - 4.17 (m,
1H), 4.30 (s, 1H), 4.67 9s, 1H), 4.74 - 4.87 (m, 3H), 5.48 9s, 1H), 5.61 (s, 1H),
5.91 (d, J = 5.1 Hz, 1H), 7.99 (d, J = 4.8 Hz, 1H), 8.20 (s, 1H), 8.34 (s, 1H); MS
(ES
+): m/z 383.06 (M+ 1).
6.15 Example 15
Effect of Compound 17 on pain
[0814] Male mice (body weight of 25-35 grams) were put in groups as follows: a first group
which was intreperitoneally administered buprenorphine (0.3 mg/kg), a second group
which was intreperitoneally administered buprenorphine (1 mg/kg), a third group which
was intreperitoneally administered Compound 17 (3 mg/kg), a fourth group which was
intreperitoneally co-administered Compound 17 (3 mg/kg) and buprenorphine (1.0 mg/kg),
and a fifth group which was intreperitoneally co-administered Compound 17 (3 mg/kg)
and buprenorphine (0.3 mg/kg). The analgesic effects in mice was measured using an
IITC model 33 tail-flick analgesia meter (IITC Inc., Woodland Hills, CA) at 0 minutes
(baseline control), 5 minutes, 15 minutes, 30 minutes and 60 minutes (in some cases
also 90 and 120 minutes) post-treatment. compound or vehicle treatment. Average recoding
value of two readings was used for each time point. A baseline for every mouse between
2 - 4 seconds of latency and a 10-second cut-off time was set for the maximum possible
effect of analgesia (% MPE). % MPE was calculated using the following formula: %MPE
= [(post-drug value - baseline) / (cut-off time - baseline)] x 100.
[0815] FIG. 5 shows that Compound 17 is useful in exerting an analgesic effect in an animal.
[0816] The results show that Compound 17, an illustrative Purine Derivative, exerts a analgesic
effect in an animal, and, accordingly, is useful for the treatment of pain.
6.16 Example 16
Effect of Compound 17 on pain
[0817] Male mice (each having a body weight of 20-30 g) were subcutaneously administered
20 µl of a 1 % formalin solution in formaldehyde (prepared by diluting a commercial
4 % [w/v] stock formalin solution) into the dorsal region of their left hind paw.
The mice were assigned to either a control group and administered vehicle, or to a
treatment group and intraperitoneally administered Compound 17 (1.0 mg/kg). Both groups
of animals were monitored for a reaction for 30 minutes post-treatment to determine
how much time each animal spends licking the treated paw. The licking time in control
group (vehicle pretreated animals) was then compared to the licking time in the treatment
group in order to calculate the analgesic effect. The 30 minute reaction period was
divided into two phases: an early phase which lasts from 0 - 5 minutes post-treatment,
and a late phase which lasts from 10 - 30 minutes post-treatment.
[0818] FIG. 6 shows that Compound 17 is useful in exerting an analgesic effect in an animal.
[0819] The results indicate that Compound 17, an illustrative Purine Derivative, exhibits
an analgesic effect during the late phase of the response and, accordingly, is useful
for treating pain.
6.17 Example 17
Effect of Compound 17 on pain
[0820] BALB/C mice (6-8 weeks of age) were intraperitoneally administered streptozotocin
(40 mg/kg, once per day for 5 consecutive days) to induce diabetes (blood glucose
levels were greater than 200 mg/mL). Three weeks after the first streptozotocin injection,
the animals were intraperitoneally administered Compound
17 (1 mg/kg) into a rear paw and post-treatment allodynia was measured using an Electrovonfrey
anesthesiometer (IITC Inc., Woodland Hills CA 91367). The analgesic activity of Compound
17 was measured at 0 minutes (control), 15 minutes, 30 minutes and 60 minutes time
point after administration of Compound 17.
[0821] FIG. 7 shows that Compound 17 is useful in exerting an analgesic effect in a animal.
[0822] The results indicate that Compound 17, an illustrative Purine Derviative, produces
a marked and lasting analgesic effect, and, accordingly, is useful for treating pain
in an animal.
6.18 Example 18
Effect of Compound 17 on pain
[0823] Male Wistar rats (each weighing between 200- 250 g, kept under pathogen-free conditions
at 24 - 25°C and provided with standard rat chow and water ad
libitum) were anaesthetized via intraperitoneal administration of pentobarbital (50 mg/kg)
and placed in a stereotaxic frame. The atlanto-occipital membrane was exposed and
a PE-10 catheter (7.5 cm) was inserted through an incision into the subarachnoidal
space. The external end of the catheter was then fixed to the skull, the wound was
closed, and the rats were allowed to recover for 7 days post-surgery. Animals without
neurological deficits were placed in a plexiglass observation chamber on a metal mesh
surface and mechanical thresholds of the plantar surface of the paw were determined
using a Dynamic Plantar Aesthesiometer (Ugo Basile, Italy) as follows: Following acclimation,
the touch stimulator unit was placed under the animal's paw such that the filament
was positioned under the target area of the paw. The filament was then lifted such
that it contacted the pad of the animal's paw and continually exerted an increasing
upward force on the paw until the animal withdrew the paw. The paw withdrawal threshold
was measured 5 times in this manner in turns and the mean of the 5 values was calculated.
After control threshold measurements were complete, carrageenan (3%, 100 µl) was administered
subcutaneously into a hindpaw, resulting in marked swelling and redness of the treated
paw. Three hours after the carrageenan administration, the threshold values were measured
again. The animals were then divided into a control group (administered vehicle intrathecally)
and a treatment group (adminstered Compound 17 intrathecally at in a 10 µl injection
volume). Threshold determinations were repeated as describe above at 15 minutes, 30
minutes, 60 minutes, 90 minutes and 120 minutes after the administration of vehicle
or Compound 17.
[0824] FIG. 8 shows that Compound 17 exerts an analgesic effect in a animal.
[0825] Results show that Compound 17, an illustrative Purine Derivative, is effective for
raising the pain threshold in a rat model of pain, and, accordingly, is useful for
treating pain.
6.19 Example 19
Effect of Compound 17 on pain
[0826] Male CD rats (each weighing from 220 g to 250 g) were prepared according to the procedure
set forth in
Z. Seltzer et al., Pain, 43:205 - 218 (1990). The rats were then anesthetized via intraperitoneal administration of sodium pentobarbital
(50 mg/kg). A skin incision was made at the upper 1/3 and 2/3 left thigh area of each
rat and the left sciatic nerve was exposed and freed from the surrounding connective
tissue. An 8-0 nylon suture was then used to tightly ligate the left sciatic nerve
of each rat so that the dorsal 1/3 to 1/2 of the nerve thickness was trapped in the
ligature. The incision was closed using 4-0 sterile suture. Seven days post-surgery,
the animals were put into four groups: a first group that was administered vehicle
(control group); a second group that was administered Compound 17 at 0.1 mg/kg; a
third group that was administered buprenorphine at 0.3 mg/kg; and a fourth group that
was co-administered Compound 17 at 0.1 mg/kg and buprenorphine at 0.3 mg/kg. Animals
in all four groups were assessed for allodynia immediately prior to treatment and
at 10, 20, 30 and 60 minutes post-treatment using the Von Frey Hair test (
G.M. Pitcher et al., J Neurosci Methods, 87:185-93 (1999)).
[0827] FIG. 9 shows that Compound 17, alone or in combination with buprenorphine, exerts
an analgesic effect in a animal.
[0828] The results show that Compound 17, an illustrative Purine Derivative, exerts an analgesic
effect in an animal, and, accordingly, is useful for treating pain.
6.20 Example 20
Effect of Compound 17 on heart rate
[0829] Adult male Wistar rats (each weighing from about 350 g to about 400 g) were anesthetized
as in Example 19, then prepared for monitoring of blood pressure and heart rate. Compound
17 was then intravenously administered via the femoral vein at a dose of 1 ng/kg/minute,
10 ng/kg/minute, or 1000 ng/kg/minute (n = 2 animals per dosage size) for a total
administration period of 20 minutes.
[0830] The results show that a 10 ng/kg/minute dose of lowered heart rate from 440 beats
per minute to 370 beats per minute and that the 1000 ng/kg/minute dose reduced heart
rate from 440 beats per minute to 150 beats per minute. Thus, Compound
17, an illustrative Purine Deriviative is exerts a heart rate lowering effect, and accordingly,
a Purine Derivative is useful for lowering an animal's ventricular rate to a rate
of not less than about 40 beats per minute.
[0831] The present invention is not to be limited in scope by the specific embodiments disclosed
in the examples which are intended as illustrations of a few aspects of the invention
and any embodiments that are functionally equivalent are within the scope of this
invention. Indeed, various modifications of the invention in addition to those shown
and described herein will become apparent to those skilled in the art and are intended
to fall within the scope of the appended claims.