This invention relates to sulfonamide derivatives useful as pharmaceuticals. More particularly, this invention relates to:

• (1) sulfonamide derivatives of formula (I) as hereinafter defined, and non-toxic salts, acid addition salts and solvates thereof,
• (2) processes for their preparation, and
• (3) pharmaceutical compositions containing them as active ingredient.

Lysosomal hydrolases of neutrophils have an important role in the defence reaction of organisms against tissue damage caused, for example, by microbes or inflammation.

Elastase and cathepsin G, which are neutral serine proteinases existing locally in azurophil granules, play a part in the decomposition of connective tissue.

In particular, elastase degrades elastic connective tissue by cleaving the cross-linking of elastin which directly maintains the elasticity of e.g. lung tissue, by cleaving the hydrophobic part of protein [J. Cell. Biol., 40, 366 (1969)] and selectively degrading the cross-linking of collagen as well as elastin [J. Biochem., 84, 559 (1978)]. It also acts on tissue proteins such as proteoglycans [J. Clin. Invest., 57, 615 (1976)]. It will be seen therefore that elastase plays an important role in the metabolism of connective tissue.

Elastase is inactivated by α₁-proteinase inhibitor (α₁-PI) which is a common inhibitor for serine proteinases in vivo and an imbalance of enzyme and inhibitor causes the destruction of tissue [Schweiz. Med. Wshr., 114, 895 (1984)].

The turnover of elastin in normal tissue is very slow [Endocrinology, 120, 92 (1978)], but pathological acceleration in degradation of elastin is found under various diseased conditions such as pulmonary emphysema [Am. Rev. Respir. Dis., 110, 254 (1974)], atherosclerosis [Lab. Invest., 22, 228 (1970)] and rheumatoid arthritis [in Neutral Proteases of Human Polymorphonuclear Leukocytes, Urban and Schwarzenberg, Baltimore - Munich (1978), page 390], which suggests a relationship between elastase and diseases [Infection Inflammation Immunity, 13, 13 (1983)].

In view of this background, many studies on the development of elastase inhibitors have been conducted recently, and various substances inhibiting elastase have been proposed and many patent applications have been filed.

For example,

• (1) it is disclosed in EP-A-0347168 that the compound of formula (A) (wherein Y^A is sulfonyl or carbonyl;
  • (i) R^1A and R^2A, which may be the same or different, each represent, inter alia, hydrogen atom, C1-16 alkyl or a group of the formula (wherein X^A is bond, sulfonyl, C1-4 alkylene, C1-4 alkyl substituted by -COOH or benzyloxycarbonyl; is carbocyclic ring or heterocyclic ring;
    nA is 1-5; and
    R^4A which may be the same or different, represent,
    inter alia, hydrogen atom, C1-8 alkyl, C1-14 alkoxy, C1-6 alkylthio, hydroxy, halogen atom, nitro, trihalomethyl, -Z^41A-COOR^43A, -CONR^41AR^42A, a group of the formula in which the group of formula is an amino acid residue;
    R^49A is hydroxy, C1-4 alkoxy, amino, amino or carbamoyl substituted by one or two C1-4 alkyl, etc.) or
  • (ii) R^1A and R^2A and the nitrogen atom bonded to R^1A and R^2A together represent a heterocyclic ring containing at least one nitrogen atom and substituted by -COOH or an unsubstituted heterocyclic ring containing at least one nitrogen atom;
    R^3A is hydrogen atom, hydroxy, C1-6 alkyl, etc.; and
    mA is 1-4)
    and non-toxic salts and acid addition salts thereof have an inhibitory activity on elastase;
• (2) it is disclosed in EP-A-0465802 that the compound of formula (B) (wherein R^1B and R^2B, which may be the same or different, each represent, hydrogen, C1-6 alkyl or C3-6 cycloalkyl, or R^1B and R^2B taken together represent -(CH₂)_nB- (in which nB is 1-6);
  R^3B is one to five of hydrogen, halogen, C1-12 haloalkyl, C1-12 alkyl, C1-12 alkoxy, C2-12 alkenyl, C3-12 cycloalkyl, mono or bicyclic aryl, -Z^BR^5B (in which Z^B is O, S, S(O) or SO₂; R^5B is hydrogen, C1-18 alkyl, C3-12 cycloalkyl, or phenyl), -NR^6BR^7B (in which R^6B and R^7B, which may be the same or different, each represent hydrogen, C1-12 alkyl, C3-6 cycloalkyl, phenyl, C1-12 alkoxy or -C(O)-R^3B, or R^6B and R^7B taken together represent -C(O)CH₂CH₂-C(O)-, -C(O)-C₆H₄-C(O)- or -(CH₂)_XB- (XB is 2, 3, 4, 5 or 6)), or
  morpholino, imidazolyl or piperazino, etc., bonded to phenyl ring on nitro atom; and
  R^4B is one to five of hydrogen, halogen, nitro, -C(O)CH₃, S(O)_pBR^9B (pB is 0, 1 or 2; R^9B is hydroxy, -ONa, C1-12 alkyl optionally substituted, cycloalkyl optionally substituted))
  and non-toxic pharmaceutically acceptable salts thereof have an inhibitory activity on elastase;
• (3) it is disclosed in EP-A-0484949 that the compound of formula (C) (wherein R^1C and R^2C, which may be the same or different, each represent hydrogen, C1-6 alkyl or C3-6 cycloalkyl, or R^1C and R^2C taken together represent - (CH₂)_nC- (in which nC is 1-6);
  Ar^C is optionally substituted phenyl; and
  Het^C is heterocyclic ring containing at least one nitrogen atom, sulfur atom or oxygen atom)
  have an inhibitory activity on elastase.

WO-A-93/11760 discloses a class of aromatic esters of phenylenedialkanoates as inhibitors of human neutrophil elastase.

EP-A-0539223 discloses a glycine derivative monosodium salt tetrahydrate having an inhibitory effect on elastase.

EP-A-0222608 discloses a class of derivatives of p-guanidinobenzoic acid which have an inhibitory effect on elastase.

Synthetic inhibitors of human neutrophil elastase are discussed in Trends in Pharmacological Science, 8, 303-307 (1987).

Human leukocyte elastase inhibitors are discussed in Annu. Rep. Med. Chem., 29, 195-204 (1994).

Few of the compounds known to have an inhibitory activity on elastase have been reported to show an inhibitory activity on elastase by oral administration. Most compounds could not be expected to show an effect by oral administration. In order to show activity by oral administration, pharmaceutical agents must be readily absorbed by the digestive organs and must maintain their activity until they are transported to an active site. Therefore, only those compounds having good stability, absorbability and/or solubility in the digestive organs are expected to show sufficient activity by oral administration.

Energetic investigations have been carried out to find new compounds having good inhibitory activity on elastase and also having high safety. As a result, the present inventors have found that these aims may be accomplished by sulfonamide derivatives of the formula (I). Further, we have found that the new compounds have good stability, absorbability and solubility and are active as elastase inhibitors by oral administration.

The present invention provides a sulfonamide derivative of formula (I): wherein R¹ is pyrrolidinyl;
R² and R³ each, independently, is hydrogen atom or C1-4 alkyl;
R⁴ is C1-4 alkyl;
m is an integer from 0 to 4; and in which R⁵ and R⁶ each, independently, is

• 1) hydrogen atom,
• 2) hydroxy,
• 3) C1-8 alkyl,
• 4) C1-8 alkoxy,
• 5) -M-R¹⁶

• 1) C1-4 alkyl,
• 2) C1-4 alkoxy,
• 3) phenyl C1-4 alkoxy,
• 4) nitro,
• 5) -COOR³⁶ (in which R³⁶ is hydrogen atom, or C1-4 alkyl substituted by -NR³⁹R⁴⁰ (in which R³⁹ and R⁴⁰ each, independently, is hydrogen atom or C1-4 alkyl),
• 6) -NR⁴³R⁴⁴ (in which R⁴³ and R⁴⁴ each, independently, is hydrogen atom, C1-4 alkyl or C2-5 acyl),
• 7) -CONR⁴⁵R⁴⁶ (in which R⁴⁵ and R⁴⁶ each, independently, is hydrogen atom or C1-4 alkyl substituted by hydroxy,
• 8) C1-4 alkyl substituted by -OSO₃H;

The sulfonamide derivatives of the present invention are novel compared with compounds disclosed in the prior art.

To summarize, the compounds of formula (A) described in EP-A-0347168 necessarily contain a pivaloyloxy group. In contrast, the compounds of the present invention have a phenyl ring which may be substituted by various substituents R¹.

Thus the compounds of the present invention have a chemical structure quite different from that of the compounds of formula (A).

The compounds of formula (B) described in EP-A-0465802 include compounds in which R^4B represents S(O)_pBR^9B. R^9B can represent hydroxy, -ONa, optionally substituted C1-12 alkyl or optionally substituted cycloalkyl, but can not represent amino group. Further, the compounds of formula (C) described in EP-A-0484949 include those in which a substituent of Ar^C represents S(O)_pCR^9C. R^9C can represent hydroxy, -ONa, optionally substituted C1-12 alkyl or optionally substituted cycloalkyl, but can not represent amino group.

In contrast, the compounds of the present invention have a sulfonamide group which may be substituted by various substituents. Thus the compounds of the present invention have a chemical structure quite different from that of the compounds of formula (B) and (C).

Furthermore, related compounds show no activity by oral administration, but some compounds in the present invention have good stability, absorbability and solubility, and are, therefore, active as elastase inhibitors by oral administration.

In the formula (I), C1-4 alkyl means methyl, ethyl, propyl, butyl and isomers thereof.

In the formula (I), C1-8 alkyl means methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl and isomers thereof.

In the formula (I), C1-8 alkylene represented by M means methylene, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene and isomers thereof.

In the formula (I), phenyl C1-4 alkyl or phenyl C1-4 alkoxy means C 1-4 alkyl or C1-4 alkoxy substituted by a phenyl group.

In the formula (I), phenyl C1-4 alkyl means methyl, ethyl, propyl, butyl and isomers thereof, which are substituted by a phenyl group.

In the formula (I), phenyl C1-4 alkoxy means methoxy, ethoxy, propoxy, butoxy and isomers thereof, which are substituted by a phenyl group.

In the formula (I), C2-5 acyl means acetyl, propionyl, butyryl, valeryl and isomers thereof.

In the formula (I), C1-8 alkoxy means methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and isomers thereof.

In the formula (I), C1-4 alkoxy means methoxy, ethoxy, propoxy, butoxy and isomers thereof.

In the formula (I), halogen atom means fluorine, chlorine, bromine and iodine.

In the formula (I), examples of the 3-15 membered mono- or bi-cyclic aromatic heterocyclic ring, saturated heterocyclic ring or partly saturated heterocyclic ring containing one or two nitrogen atoms or one nitrogen atom and one sulfur atom or oxygen atom represented by that is, R⁵ and R⁶, taken together with the nitrogen atom to which they are attached, include
   pyrrole, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, azepine, diazepine, aziridine, azetidine, pyrroline, pyrrolidine; imidazoline, imidazolidine, pyrazoline, pyrazolidine, piperidine, piperazine, tetrahydropyrimidine, hexahydropyrimidine, tetrahydropyridazine, hexahydropyridazine, hexahydroazepine, hexahydrodiazepine, oxazole, isooxazole, thiazole, isothiazole, oxazine, oxazepine, thiazine, thiazepine, indole, isoindole, indazole, quinoline, isoquinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, benzoxazole, benzothiazole, benzoimidazole, dihydrooxazole, tetrahydrooxazole, dihydroisooxazole, tetrahydroisooxazole, dihydrothiazole, tetrahydrothiazole, dihydroisothiazole, tetrahydroisothiazole, morpholine, thiomorpholine, indoline, isoindoline, perhydroindole, dihydroindazole, perhydroindazole, dihydroquinoline, tetrahydroquinoline, perhydroquinoline, dihydroisoquinoline, tetrahydroisoquinoline, perhydroisoquinoline, dihydrophthalazine, tetrahydrophthalazine, perhydrophthalazine, dihydronaphthyridine, tetrahydronaphthyridine, perhydronaphthyridine, dihydroquinoxaline, tetrahydroquinoxaline, perhydroquinoxaline, dihydroquinazoline, tetrahydroquinazoline, perhydroquinazoline, dihydrocinnoline, tetrahydrocinnoline, perhydrocinnoline, dihydrobenzoxazole, perhydrobenzoxazole, dihydrobenzothiazole, perhydrobenzothiazole, dihydrobenzoimidazole, perhydrobenzoimidazole, 7-azabicyclo[3.2.1]octane, and 3-azabicyclo[3.2.2]nonane rings.

In formula (I):-

• m preferably represents 0, 1 or 2, more preferably 0 or 1.

R⁴ represents C_1-4 alkyl, for example methyl, ethyl or isopropyl. Methyl is especially preferred. When one or two substituents R⁴ are present they preferably occupy one or both positions adjacent to the oxygen atom attached to the phenyl ring.

Compound in which m is 1 and R⁴ represents methyl in the ortho position relative to the oxygen atom attached to the phenyl ring are especially preferred.

One of R² and R³ preferably represents hydrogen, methyl, or ethyl, and the other represents methyl, ethyl, isopropyl, phenyl or trifluoromethyl. The ethyl group represented by one of R² and R³ is preferably in β-configuration.

R₁ is preferably on the 4-position of the phenyl ring. Pyrrolidin-1-yl is preferred as R₁.

In the grouping NR⁵R⁶, when R⁵ and R⁶, taken together with the nitrogen atom to which they are attched do not represent a heterocyclic ring, R⁵ and R⁶ preferably represent hydrogen; methyl; ethyl; propyl; methoxy; hydrogen is especially preferred.

In the grouping NR⁵R⁶, when R⁵ and R⁶, taken together with the nitrogen atom to which they are attched represent a heterocyclic ring, the ring preferably represents pyrrolidine; indole; indoline; perhydroindole; benzoimidazole; morpholine; piperidine; piperazine; 7-azabicyclo[3.2.1]octane, 3-azabicyclo[3.2.2]nonane; tetrahydrooxazole; tetrahydrothiazole; Imidazole; hexahydrodiazepine; aziridine; azetidine; piperazine is especially preferred.

In the grouping NR⁵R⁶, when R⁵ and R⁶, taken together with the nitrogen atom to which they are attched represent a heterocyclic ring, R¹⁵ preferably represents amino; methoxy; dimethylamino; acetylamino; nitro; carboxy; ester, e.g. ethoxycarbonyl, t-butoxycarbonyl, 2-aminoethoxycarbonyl, 2-(2-hydroxyethoxy)ethoxycarbonyl, carboxy is especially preferred.

In the grouping NR⁵R⁶, when R⁵ and R⁶, taken together with the nitrogen atom to which they are attched represent a heterocyclic ring, q preferably represents 0, 1 or 2, more preferably 0 or 1.

Throughout the specification including claims, it may be easily understood by those skilled in the art, that all isomers are included in the present invention. For example, the alkyl, alkylene and alkenylene groups include straight-chain and also branched-chain ones. Double bond in alkenylene includes E, Z and EZ mixture. Accordingly, all isomers produced by the existence of asymmetric carbon atoms are included in the present invention when groups such as branched-chain alkyl are present.

The compounds of the formula (I), of the present invention may be converted into the corresponding non-toxic salts or acid addition salts by methods known per se.

Water-soluble salts are preferred. Suitable salts, for example, include salts of alkali metals (e.g. potassium or sodium), salts of alkaline earth metals (e.g. calcium or magnesium), ammonium salts, salts of pharmaceutically-acceptable organic amines (e.g. tetramethylammonium, triethylamine, methylamine, dimethylamine, cyclopentylamine, benzylamine, phenethylamine, piperidine, monoethanolamine, diethanolamine, tris(hydroxymethyl)amine, lysine, arginine or N-methyl-D-glucamine).

Water-soluble acid addition salts are also preferred. Suitable acid addition salts, for example, include the salts with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid and nitric acid, and the salts with organic acids such as acetic acid, trifluoroacetic acid, lactic acid, tartaric acid, oxalic acid, fumaric acid, maleic acid, benzenesulfonic acid, toluenesulfonic acid, isethionic acid, glucuronic acid and gluconic acid.

The compounds of the formula (I) or salts, of the present invention may be converted into the corresponding solvates by methods known per se.

Water-soluble solvates are preferred. Suitable solvates, for example, include the salts with water or with alcohol solvents such as ethanol.

Preferred compounds of the present invention are of the following formulae (I-A1), (I-A2), (I-B1) and (I-B2). (wherein all symbols are as hereinbefore defined).

Representative compounds of the present invention are illustrated by the compounds in the following Tables and the non-toxic salts and acid addition salts thereof.

In the Tables, Me is methyl, Et is ethyl, Pr is propyl, iPr is isopropyl and tBu is tert-butyl.

The compounds of formula (I), of the present invention, may be prepared by esterifying a compound of formula (II) wherein R^1a is pyrrolidinyl;
and R² and R³ are as defined in claim 1,
with a compound of formula (III) wherein R⁴ and m are as defined in claim 1, (in which R^5a and R^6a each, independently, is

• 1) hydrogen atom (with the proviso that, R^5a and R^6a do not represent hydrogen atom at the same time),
• 2) hydroxy,
• 3) hydroxy protected by a protecting group which is removable under acid conditions,
• 4) t-butoxycarbonyl,
• 5) benzyloxycarbonyl,
• 6) C1-8 alkyl,
• 7) C1-8 alkoxy,
• 8) -M-R^16a (in which M is as defined in claim 1, and R^16a is 5-15 membered mono- or bi-cyclic aromatic heterocyclic ring, saturated heterocyclic ring or partly saturated heterocyclic ring containing one to four nitrogen atoms, one or two oxygen atoms or one nitrogen atom and one sulfur atom or oxygen atom, unsubstituted or substituted by 1 to 4 substituents selected from C1-4 alkyl, C1-4 alkoxy, hydroxy, phenyl C1-4 alkyl, -COOR²⁶ (in which R²⁶ is as defined in claim 1), hydroxy C1-4 alkyl in which hydroxy is protected by a protecting group which is removable under acid conditions or C2-4 alkoxyalkyl),
• 9) -J^a-COOR²⁹ (in which R²⁹ is as defined in claim 1,

• 1) C1-4 alkyl,
• 2) C1-4 alkoxy,
• 3) phenyl C1-4 alkoxy,
• 4) nitro,
• 5) -COOR^36a (in which R^36a is hydrogen atom, C1-4 alkyl substituted by -NR^39aR^40a (in which R^39a and R^40a each, independently, is hydrogen atom (with the proviso that, R^39a and R^40a do not represent hydrogen atom at the same time, t-butoxycarbonyl, benzyloxycarbonyl,or C1-4 alkyl),
• 6) -NR^43aR^44a (in which R^43a and R^44a each, independently, is hydrogen atom (with the proviso that, R^43a and R^44a do not represent hydrogen atom at the same time), t-butoxycarbonyl, benzyloxycarbonyl, C1-4 alkyl or C2-5 acyl),
• 7) -CONR^45aR^46a (in which R^45a and R^46a each, independently, is hydrogen atom, or C1-4 alkyl substituted by hydroxy or protected hydroxy),

Protected hydroxy means, for example, hydroxy protected by a protecting group which is removable under acid conditions (e.g. C2-4 alkoxyalkyl, t-butyldimethylsilyl, tetrahydropyran (THP), triphenylmethyl) or hydroxy protected by a protecting group which is removable by hydrogenation (e.g. benzyl).

Hydroxy protected by a protecting group which is removable under acid conditions means, for example, hydroxy group protected by C2-4 alkoxyalkyl, t-butyldimethylsilyl, tetrahydropyran (THP) or triphenylmethyl.

Protected amino acid, α-amino acid or piperazino ring means, for example, amino acid, α-amino acid or piperazino ring protected by t-butoxycarbonyl (Boc) or benzyloxycarbonyl (Cbz).

- CHO protected by a protecting group which is removable under acid conditions means, for example, -CHO protected by acetal (e.g. dimethylacetal or diethylacetal or ketal (e.g. ethylenedioxyketal or trimethylenedioxyketal).

The above esterification is known per se and can be carried out by methods for example

• (1) using an acid halide,
• (2) using a mixed acid anhydride,
• (3) using a condensing agent

Each of these methods can be carried out, for example, as follows

• (1) the method using an acid halide may be carried out, for example, by reacting a carboxylic acid with an acid halide (e.g., oxalyl chloride or thionyl chloride) in an inert organic solvent (e.g., chloroform, methylene chloride; diethyl ether or tetrahydrofuran) or without a solvent at from -20°C to the reflux temperature of the solvent, and then by reacting the acid halide obtained with a corresponding alcohol in the presence of a tertiary amine (e.g. pyridine, triethylamine, dimethylaniline or dimethylaminopyridine) in an inert organic solvent (e.g. chloroform, methylene chloride, diethyl ether or tetrahydrofuran), at a temperature of from 0°C to 40°C.
• (2) the method using a mixed acid anhydride may be carried out, for example, by reacting a carboxylic acid and an acid halide (e.g. pivaloyl chloride, tosyl chloride or mesyl chloride) or an acid derivative (e.g. ethyl chloroformate or isobutyl chloroformate) in the presence of a tertiary amine (e.g. pyridine, triethylamine, dimethylaniline or dimethylaminopyridine) in an inert organic solvent (e.g. chloroform, methylene chloride, diethyl ether or tetrahydrofuran) or without a solvent at a temperature of from 0°C to 40°C, and then by reacting the mixture of acid anhydride obtained with a corresponding alcohol in an inert organic solvent (e.g. chloroform, methylene chloride, diethyl ether or tetrahydrofuran), at a temperature of from 0°C to 40°C,
• (3) the method using a condensing agent (e.g., 1,3-dicyclohexyl carbodiimide (DCC), 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide (EDC) or 2-chloro-1-methylpyridinium iodide) may be carried out, for example, by reacting a carboxylic acid with a corresponding alcohol using a condensing agent in the presence or absence of a tertiary amine (e.g. pyridine, triethylamine, dimethylaniline or dimethylaminopyridine) in an inert organic solvent (e.g., chloroform, methylene chloride, dimethyl formamide or diethyl ether) or without a solvent at a temperature of from 0°C to 40°C.

The reactions (1), (2) and (3) hereinbefore described may be preferably carried out in an atmosphere of inert gas (e.g. argon or nitrogen) under anhydrous conditions.

The hydrolysis of t-butylester group or the reaction resulting from treatment with acid (e.g. elimination of C2-4 alkoxyalkyl, t-butoxycarbonyl or dimethylacetal) is known per se and may be carried out, for example, by using an organic acid (e.g. trifluoroacetic acid) or an inorganic acid (e.g. hydrochloric acid), or a mixture thereof, in an inert organic solvent (e.g. methylene chloride, chloroform, methanol, dioxane, ethyl acetate or anisole) at a temperature of from 0°C to 90°C.

The hydrogenolysis is known per se, and may be carried out, for example, in an inert solvent [such as an ether (e.g., tetrahydrofuran, dioxane, diethoxyethane or diethyl ether), an alcohol (e.g., methanol or ethanol), a benzene analogue (e.g. benzene or toluene), a ketone (e.g. acetone or methyl ethyl ketone), a nitrile (e.g. acetonitrile), an amine (e.g., dimethylformamide), water, ethyl acetate, acetic acid or a mixture of two or more of them], in the presence of a hydrogenation catalyst (e.g., palladium on activated carbon, palladium black, palladium, palladium hydroxide on carbon, platinum oxide, nickel or Raney nickel (registered trade mark)), in the presence or absence of an inorganic acid (e.g. hydrochloric acid, sulfuric acid, hypochlorous acid, boric acid or tetrafluoroboric acid) or an organic acid (e.g., acetic acid, p-toluenesulfonic acid, oxalic acid, trifluoroacetic acid or formic acid), at ordinary or elevated pressure under an atmosphere of hydrogen, at a temperature of from 0°C to 200°C. When using an acid, its salt may be used at the same time.

The sulfuric acid esterification is known per se, and may be carried out, for example, by reacting sulfur trioxide pyridine complex in the presence of a tertiary amine (e.g. pyridine) at a temperature of from 0°C to 40°C.

The compounds of formulae (II) and (III) used as starting materials may be prepared by the methods of the following Scheme 1 or by methods known per se or are commercially available compounds. For example, 2-phenylbutanoic acid is commercially available. The compounds may also be prepared by the methods described in the Examples of the present specification.

In Scheme 1 hereinbefore described

• W is an alkali metal,
• Y is benzyl, benzyloxycarbonyl, or a protecting group which may be removed under acid conditions (e.g. C2-4 alkoxyalkyl, t-butyldimethylsilyl, tetrahydropyran (THP) or triphenylmethyl), and
• the other symbols are as hereinbefore defined.

It has been confirmed that the compounds of the formula (I), of the present invention have inhibitory activities on elastase. For example, in laboratory tests the following results were obtained.

A mixture with 0.5 ml of 0.2 mM HEPES buffer (pH 8.0), 0.2 ml of 2.5 M NaCI, 0.1 ml of 1 % polyethyleneglycol 6000, 0.13 ml of distilled water, test compound dissolved in 0.01 ml of dimethylsulfoxide (DMSO) and 0:05 ml of 0.8 Unit/ml human polymorphonuclear elastase (HSE) was preincubated at 37 °C for 20 min. 5 mM of Meo-Suc-Ala-Ala-Pro-Val-pNA (DMSO solution, 0.01ml) was then added to the above mixture and was incubated at 37°C for 5 min. The reaction was terminated by 0.1 ml of 50% acetic acid and the p-nitroanilide (pNA) released was measured spectrophotometrically at 405 nM. Percent inhibition of a compound was calculated by the following equation.$$\text{Inhibition (\%) = 1-{delta OD(test-blank)/delta OD(control-blank)}X100}$$

Results are shown in Table 47. Example No. IC₅₀ (µM) 1(16) 0.017 Inv. 1(40) 0.019 Comp. 1(56) 0.014 Comp. 1(78) 0.0080 Inv. 1(130) 0.022 Inv. 1(139) 0.024 Inv. 2 0.055 Inv. 2(1) 0.012 Inv. 2(42) 0.013 Inv. 2(62) 0.0068 Comp. 2(69) 0.011 Comp. 2(77) 0.018 Inv. 2(111) 0.0097 Comp. 2(120) 0.023 Comp. 2(157) 0.008 Comp. 2(173) 0.014 Comp. 2(179) 0.049 Comp. 2(197) 0.010 Comp. 2(274) 0.012 Inv. 2(276) 0.0093 Inv. Inv. = inventive example. Comp. = Comparative example.

A test compound suspended in 0.5 % Carboxymethylcellulose or 80 % Polyethyleneglycol, 400 or 2 % Tween 80 was administered orally to a group of 5 Syrian hamsters. At60 min after the administration, 10 U/0.1 ml of HSE was injected intratracheally via surgically exposed trachea under pentobarbital anesthesia (60 mg/kg, i.p.) to induce lung injury. At 60 min after the injection, hamsters were bled to sacrifice and subjected to bronchoalveolar lavage with 2.5 ml of saline and recovered lavage solution (BALF). The recovered BALF (0.5 ml) was diluted by 4 times with 2 % aqueous solution sodium carbonate and sonicated for 10 sec. The lavage fluid was further diluted by 2.5 times with 2% aqueous solution sodium carbonate and the amount of blood in BALF was calculated from absorbance at 414 nM using standard curve.

Results are shown in Table 48 and 49. Example No. inhibition at 500 mg/kg (%) 1(68) 51 Comp. 1(90) 65 Inv. 2 81 Inv. 2(42) 67 Inv. 2(69) 83 Comp. Example No. ED₅₀ 1 (139) 192 mg/kg 2(274) 132 mg/kg 2(276) 73 mg/kg

The above experiments show that compounds of the present invention possess inhibitory activity on elastase, even when administered orally.

The toxicity of the compounds of the present invention is very low. Therefore, the compounds of the present invention may be considered to be sufficiently safe and suitable for pharmaceutical use.

The compounds of the formula (I), of the present invention, and non-toxic salts and acid addition salts thereof, possess inhibitory activity on elastase. Accordingly, they are useful for the treatment and/or prevention of diseases induced by an abnormal enhancement of the degradation of elastin, collagen fiber and/or proteoglycan, resulting from the action of elastase on a mammalian animal, especially a human (e.g. chronic obstructive pulmonary disease such as emphysema, rheumatoid arthritis, atherosclerosis, adult respiratory distress syndrome (ARDS), glomerular nephritis, myocardial infarction, idiopathic ulcerative colitis or gingivitis).

For the purpose above described, the compounds of the formula (I), of the present invention, or non-toxic salts, acid addition salts or solvates thereof may normally be administered systemically or locally usually by oral or parenteral administration.

The doses to be administered are determined depending upon, for example, age, body weight, symptom, the desired therapeutic effect, the route of administration, and the duration of the treatment. In the human adult, the doses per person are generally from 1 mg to 1000 mg, by oral administration, up to several times per day, or from 0.1 mg to 100 mg, by parenteral administration up to several times per day, or by continuous administration for from 1 to 24 hrs. per day from vein.

As mentioned above, the doses to be used depend upon various conditions. Therefore, there are cases in which doses lower than or greater than the ranges specified above may be used.

The compounds of the present invention may be administered in the form of, for example, solid compositions, liquid compositions or other compositions for oral administration, injections, liniments or suppositories for parenteral administration.

Solid compositions for oral administration include compressed tablets, pills, capsules, dispersible powders, and granules. Capsules include hard capsules and soft capsules.

In such compositions, one or more of the active compound(s) may be admixed with at least one inert diluent (such as lactose, mannitol, glucose, hydroxypropyl cellulose, microcrystalline cellulose, starch, polyvinylpyrrolidone or magnesium metasilicate aluminate). The compositions may also comprise, as is normal practice, additional substances other than inert diluents: e.g. lubricating agents (such as magnesium stearate), disintegrating agents (such as cellulose calcium glycolate), stabilizing agents (such as lactose), and agents to assist dissolution (such as glutamic acid or asparaginic acid).

The tablets or pills may, if desired, be coated with a film of gastric or enteric material (such as sugar, gelatin, hydroxypropyl cellulose or hydroxypropylmethyl cellulose phthalate), or be coated with two or more films. And further, coating may include containment within capsules of absorbable materials such as gelatin.

Liquid compositions for oral administration include pharmaceutically-acceptable solutions, emulsions, suspensions, syrups and elixirs. In such compositions, one or more of the active compound(s) contained in inert diluent(s) commonly used in the art (e.g. purified water or ethanol). Besides inert diluents, such compositions may also comprise adjuvants (such as wetting agents or suspending agents, sweetening agents, flavouring agents, perfuming agents, and preserving agents.

Other compositions for oral administration include spray compositions which may be prepared by known methods and which comprise one or more of the active compound(s). Spray compositions may comprise additional substances other than inert diluents: e.g. stabilizing agents (such as sodium sulfate), isotonic buffers (such as sodium chloride, sodium citrate or citric acid). For preparation of such spray compositions, for example, the method described in the United States Patent No. 2868691 or 3095355 may be used.

Injections for parenteral administration include sterile aqueous or non aqueous solutions, suspensions and emulsions. In such compositions, one or more active compound(s) may be admixed with at least one inert aqueous diluent(s) (e.g. distilled water for injection or physiological salt solution) or inert non-aqueous diluent(s) (e.g. propylene glycol, polyethylene glycol, olive oil, ethanol or POLYSORBATE80 (registered trade mark).

Injections may comprise additional ingredients other than inert diluents: e.g. preserving agents, wetting agents, emulsifying agents, dispersing agents, stabilizing agents (e.g. lactose), assisting agents such as agents to assist dissolution (e.g. glutamic acid or asparaginic acid).

They may be sterilized for example, by filtration through a bacteria-retaining filter, by incorporation of sterilizing agents in the compositions or by irradiation. They may also be manufactured in the form of sterile solid compositions, for example, by freeze-drying, which may be dissolved in sterile water or some other sterile diluent(s) for injection immediately before used.

Other compositions for parenteral administration include liquids for external use, and endermic liniments, ointment, suppositories and pessaries which comprise one or more of the active compound(s) and may be prepared by methods known per se.

The following reference examples and examples illustrate, but do not limit, the present invention.

The solvents in parentheses show the developing or eluting solvents and the ratios of the solvents used are by volume in chromatographic separations and TLC.

The NMR data show the solvents used in the measurements in parentheses.

3-methyl-4-hydroxybenzenesulfonic acid • potassium salt

To stirring conc. sulfuric acid (26 ml) at 100 °C was slowly added o-cresol (50 ml), the mixture was stirred at 100°C for 5 hours. After the reaction mixture was cooled at room temperature, to mixture was neutralized by slowly adding potassium hydroxide (27.5 g) in water (35 ml) solution. After to the mixture was added methanol (100 ml), the precipitate was filtered to give the title compound (56.5 g) having the following physical data.

TLC : Rf 0.18 (chloroform:methanol:water=6:4:1).

3-methyl-4-(benzyloxycarbonyloxy)benzenesulfonic acid • potassium salt

To a suspension of the compound prepared in reference example 1 (12.2 g) in tetrahydrofuran (THF) (100 ml) was added 2N aqueous solution of sodium hydroxide (28 ml) at room temperature, following added benzyloxycarbonyl chloride (8 ml) under cooling with ice. The reaction mixture was stirred for 30 min. The reaction mixture was concentrated under reduced pressure, and cooled with ice, and the precipitate was filtered to give the title compound (7.3 g) having the following physical data.

TLC : Rf 0.51 (chloroform:methanol:water=6:4:1).

3-methyl-4-(benzyloxycarbonyloxy)benzenesulfonyl chloride

To a suspension of the compound prepared in reference example 2 (46.1 g) in dimethylformamide (DMF) (100 ml) was slowly added thionyl chloride (15 ml) under cooling with ice. The reaction mixture was stirred for 30 min at 5 °C. To the reaction mixture was added ice water, and the precipitate was filtered to give the title compound (39.4 g) having the following physical data.

TLC : Rf 0.56 (chloroform:methanol:water=6:4:1).

4-(2S-t-butyloxycarbonylpyrrolidin-1-ylsulfonyl)-2-methylphenol

To a solution of L-proline·t-butylester (1.9 g) in pyridine (10 ml) was added the compound prepared in reference example 3 (3.7 g) under cooling with ice. The reaction mixture was stirred for 30 min. The mixture was quenched by adding 2N aqueous solution hydrochloric acid and extracted with ethyl acetate (200 ml). The organic layer was washed with a saturated aqueous solution of sodium hydrocarbonate and a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and concentrated. 10 % Palladium on activated carbon (500 mg) was added to a solution of the residue (4.9 g) in methanol (200 ml) and the mixture was stirred for 2 h at room temperature under an atmosphere of hydrogen. The mixture was filtered through Celite (being on sale). The filtrate was concentrated to give the tittle compound (3.4 g) having the following physical data.

TLC : Rf 0.35 (hexane:ethyl acetate=1:1).

2RS-(4-nitrophenyl)butanoic acid

To a mixture solution of 2-phenylbutanoic acid (200 g) in acetic acid (200 ml) and conc. sulfuric acid (150 ml) was slowly added conc. nitric acid (150 ml) at 15 °C. The reaction mixture was stirred for 10 min at same temperature. The reaction mixture was poured into ice water, and the precipitate was filtered. The residue was recrystallized from the mixture solution of hexane/ethyl acetate to give the title compound (103 g) having the following physical data.

TLC : Rf 0.50 (ethyl acetate).

2RS-(4-aminophenyl)butanoic acid methylester

To a solution of the compound prepared in reference example 5 (15.7 g) in DMF (60 ml) was added potassium carbonate (12 g) under cooling with ice. To the mixture was added methyl iodide (5 ml) at same temperature. The reaction mixture was stirred for 2h at room temperature. The mixture was quenched by adding 1N aqueous solution hydrochloric acid (200 ml) and extracted with the mixture of hexane/ethyl acetate (1:1, 200 ml). The organic layer was washed with water and a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and concentrated. 5 % Palladium on activated carbon (1.3 g) was added to a solution of the residue in methanol (300 ml) and the mixture was stirred for 2 h at room temperature under an atmosphere of hydrogen. The mixture was filtered through Celite (being on sale). The filtrate was concentrated to give the tittle compound (14.2 g) having the following physical data.

TLC : Rf 0.47 (hexane:ethyl acetate=1:1).

2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid

To a solution of the compound prepared in reference example 6 (14.2 g) in DMSO (75 ml) was added potassium carbonate (11 g) and 1,4-dibromobutane (9 ml). The reaction mixture was stirred for 1h at 40°C. To the mixture was added sodium iodide (11.2 g). the reaction mixture was stirred for 3h at 40 °C and stirred for 2h at 60 °C. The reaction mixture was quenched by adding water and extracted with the mixture of hexane/ethyl acetate (1:1, 1000 ml). The organic layer was washed with water and a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and concentrated. To a solution of the residue in methanol (80 ml) was added 5N aqueous solution of sodium hydroxide (20 ml) and the mixture was stirred for 5 h at room temperature. To the mixture was added aqueous solution hydrochloric acid until pH 8, and washed with ethyl acetate. The water layer was neutralized by adding aqueous. solution hydrochloric acid, and extracted with ethyl acetate. The extract was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous magnesium sulfate and concentrated. The residue was recrystallized from the mixture solution of hexane/ethyl acetate (3:1) to give the title compound (9.83 g) having the following physical data.

TLC : Rf 0.30 (hexane:ethyl acetate=1:1).

4-(2S-t-butyloxycarbonylpyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

To a solution of the compound prepared in reference example 4 (748 mg), the compound prepared in reference example 7 (537 mg) and dimethylaminopyridine (64 mg) in dichloromethane (20 ml) was added 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (482 mg) at room temperature. The reaction mixture was stirred for 2h at room temperature. To the reaction mixture was added ethyl acetate, and washed with 1N aqueous solution hydrochloric acid (x2). The organic layer was dried over anhydrous magnesium sulfate and concentrated. The residue was purified by column chromatography on silica gel (hexane : ethyl acetate = 5 : 1) to give the tittle compound (1.04 g) having the following physical data.

TLC : Rf 0.23 (hexane:ethyl acetate=5:1).

By the same procedure as Preparation example 1 and by known methods converted to corresponding salts or acid addition salts, the compounds having the following physical data were given by using corresponding phenol derivatives instead of the compound prepared in reference example 4 and by using corresponding carboxylic acid derivatives instead of the compound prepared in reference example 7.

4-(2S-hydroxymethylpyrrolidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ7.85 (2H, d, J=9Hz), 7.28 (2H, d, J=9Hz), 7.28 (2H, d, J=9Hz), 6.83 (2H, d, J=9Hz), 3.75 (1H, t, J=7Hz), 3.60-3.44 (2H, m), 3.40-3.20 (6H, m), 3.11-2.95 (1H, m), 2.21-1.90 (5H, m), 1.90-1.65 (3H, m), 1.55-1.30 (2H, m), 0.90 (3H, t, J=7Hz);

TLC : Rf 0.48 (ethyl acetate:hexane=1:1).

4-(pyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester

NMR (CDCl₃): δ7.68-7.57 (2H, m), 7.23 (2H, d, J=8Hz), 7.06 (1H, d, J=8Hz), 6.55 (2H, d, J=8Hz), 3.61 (1H, t, J=7Hz), 3.35-3.13 (8H, m), 2.30-1.65 (13H, m), 0.98 (3H, t, J=7Hz);

TLC : Rf 0.49 (ethyl acetate:hexane=3:7).

4-(indolin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃):δ7.78 (2H, d, J=8.8Hz), 7.62 (1H, d, J=8.0Hz), 7.50-7.34 (4H, m), 7.24-7.12 (1H, m), 7.08 (3H, d, J=8.8Hz), 6.97 (1H, dt, J=1.0 and 7.2Hz), 3.90 (2H, d, J=8.4Hz), 3.68 (1H, t, J=7.6Hz), 3.70-3.45 (4H, m), 2.89 (2H, t, J=8.4Hz), 2.40-2.20 (4H, m), 2.30-2.05 and 2.00-1.75 (each 1H, m), 0.96 (3H, t, J=7.2Hz);

TLC : Rf 0.47 (ethyl acetate:hexane=1:2).

4-(6-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 8.10 (dd, J=2.4, 8.8Hz, 1H), 7.96 (s, 1H), 7.7-7.6 (m, 3H), 7.18 (d, J=8.4Hz, 2H), 7.05 (d, J=8.0Hz, 1H), 6.52 (d, J=8.4Hz, 2H), 4.01 (t, J=8.6Hz, 2H), 3.58 (t, J=7.8Hz, 1H), 3.3-3.2 (m, 4H), 3.08 (t, J=8.6Hz, 2H), 2.3-1.8 (m, 2H), 2.00 (s, 3H),2.1-1.9 (m, 4H), 0.96 (t, J=7.4Hz, 3H);

TLC : Rf 0.33 (hexane:ethyl acetate=3:1).

4-(6-aminoindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.6-7.4 (m, 3H), 7.20 (d, J=8.7Hz, 2H), 6.94 (d, J=8.4Hz, 1H), 6.53 (d, J=8.7Hz, 2H), 6.6-6.4 (m, 2H), 3.83 (t, J=8.2Hz, 2H), 3.58 (t, J=7.7Hz, 1H), 3.4-3.2 (m, 4H), 2.64 (t, J=8.2Hz, 2H), 2.3-1.8 (m, 6H), 1.95 (s, 3H), 0.97 (t, J=7.4Hz, 3H);

TLC : Rf 0.59 (hexane:ethyl acetate=1:1).

4-(7-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 8.38 (d, J=2.2Hz, 1H), 7.85 (dd, J=2.0, 8.4Hz, 1H), 7.8-7.6 (m, 2H), 7.2-7.1 (m, 1H), 7.18 (d, J=8.6Hz, 2H), 7.03 (d, J=8.2Hz, 1H), 6.52 (d, J=8.6Hz, 2H), 3.99 (t, J=8.6Hz, 2H), 3.58 (t, J=7.6Hz, 1H), 3.3-3.2 (m, 4H), 3.05 (t, J=8.6Hz, 2H), 2.3-1.7 (m, 9H), 0.96 (t, J=7.4Hz, 3H);

TLC : Rf 0.49 (hexane:ethyl acetate=1:1).

4-(7-aminoindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.6-7.5 (m, 2H), 7.15 (d, J=8.6Hz, 2H), 7.0-6.9 (m, 2H), 6.82 (d, J=8.0Hz, 1H), 6.52 (d, J=8.6Hz, 2H), 6.29 (dd, J=2.0, 8.0Hz, 1H), 3.84 (t. J=8.0Hz, 2H), 3.58 (t, J=7.6Hz, 1H), 3.4-3.2 (m, 4H), 2.76 (t, J=7.6Hz, 2H), 2.3-1.8 (m, 9H), 0.97 (t, J=7.4Hz, 3H);

TLC : Rf 0.40 (hexane:ethyl acetate=2:1).

4-(benzimidazol-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 8.35 (1H, s), 7.79 (4H, m), 7.35 (2H, m), 7.17 (2H, d, J=8.8Hz), 7.08 (1H, d, J=9.4Hz), 6.52 (2H, d, J=8.8Hz), 3.57 (1H, t, J=7.8Hz), 3.26 (4H, m), 2.10 (1H, m), 2.00 (3H, s), 1.97 (4H, m), 1.88 (1H, m), 0.95 (3H, t, J=7.4Hz);

TLC : Rf 0.49 (hexane:ethyl acetate=2:1).

4-(morpholin-4-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (DMSO-d₆): δ 7.75 (2H, d, J=7Hz), 7.27 (2H, d, J=7Hz), 7.16 (2H, d, J=7Hz), 6.52 (2H, d, J=7Hz), 3.67 (1H, t, J=7Hz), 3.61 (4H, t-like), 3.20 (4H, t-like), 2.83 (4H, t-like), 2.04 (1H, m), 1.94 (4H, t-like), 1.79 (1H, m), 0.88 (3H, t, J=7Hz);

TLC : Rf 0.54 (hexane:ethyl acetate=1:1).

4-(4-(N,N-dimethylamino)piperidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃):δ7.71 (2H, d, J=8.8Hz), 7.20 (2H, d, J=8.8Hz), 7.16 (2H, d. J=8.7Hz), 6.54 (2H, d, J=8.8Hz), 3.75 (2H, d, J=13.7Hz), 3.58 (1H, t, J=7.7Hz), 3.29 (4H, t, J=6.6Hz), 2.36-1.53 (19H, m), 0.98 (3H, t, J=7.4Hz);

TLC : Rf 0.25 (hexane:ethyl acetate=2:1).

4-(3-azabicyclo[3.2.2]nonan-3-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.73 (2H, d, J=8.6Hz), 7.53 (2H, d, J=8.6Hz), 7.45 (2H, d, J=8.6Hz), 7.15 (2H, d, J=8.8Hz), 3.72 (1H, t, J=7.6Hz), 3.75-3.50 (4H, m), 3.22 (4H, d, J=4.2Hz), 2.40-2.20 (4H, m), 2.40-1.75 (2H, m), 2.10-2.00 (2H, m), 1.80-1.50 (8H, m), 0.99 (3H, t, J=7.4Hz);

TLC : Rf 0.57 (ethyl acetate:hexane=1:3).

4-(1,3,3-trimethyl-6-azabicyclo[3.2.1]octan-6-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.81 (2H, d, J=8.8Hz), 7.40 (2H, d, J=8.4Hz), 7.36-7.18 (2H, brs), 7.15 (2H, d, J=8.8Hz), 4.08 (1H, t-like), 3.69 (1H, t, J=7.8Hz), 3.64-3.38 (4H, m), 3.32 (1H, d, J=9.6Hz), 2.76 (1H, dd, J=9.6 and 1.4Hz), 2.36-2.08 (5H, m), 2.02-1.76 (2H, m), 1.52 (2H, d, J=14.4Hz), 1.34 (2H, d, J=12.4Hz), 1.22 (3H, s), 1.16-1.02 (1H, m), 0.99 (3H, t, J=7.4Hz), 0.94 (3H, s), 0.92 (3H, s);

TLC : Rf 0.54 (ethyl acetate:hexane=1:3).

4-(morpholin-4-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.56-7.51 (2H, m), 7.26-7.21 (2H, m), 7.10 (1H, d, J=8Hz), 6.55 (2H, d, J=8Hz), 3.75-3.71 (4H, m), 3.62 (1H, t, J=8Hz), 3.32-3.26 (4H, m), 3.01-2.96 (4H, m), 2.37-1.73 (2H, m), 2.06 (3H, s), 2.04-1.96 (4H, m), 1.00 (3H, t, J=8Hz);

TLC : Rf 0.27 (hexane:ethyl acetate=3:1).

4-(imidazol-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR(CDCl₃):δ7.99 (1H, m), 7.75 (1H, s), 7.72 (1H, m), 7.27-7.08 (5H, m), 6.54 (2H, d, J=8.8Hz), 3.60 (1H, t, J=7.6Hz), 3.28 (4H, m), 2.14 (1H,m), 2.04 (3H, s), 2.01 (4H, m), 1.91 (1H, m), 0.97 (3H, t, J=7.4Hz);

TLC : Rf 0.36 (hexane:ethyl acetate=2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.80-7.56 (6H, m), 7.18 (1H, d, J=8.2Hz), 4.00 (1H, t, J=7.6Hz), 3.90-3.72 (4H, m), 3.30 (8H, s-like), 2.43-2.15 (5H, m), 2.06 (3H, s), 2.15-1.84 (1H, m), 1.00 (3H, 1, J=7.2Hz);

TLC : Rf 0.53 (chloroform:methanol:acetic acid=15:2:1).

4-(N-1RS-(ethoxycarbonyl)-2-(morpholin-4-yl)ethylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.84 (2H, d, J=8.6Hz), 7.20 (2H, d, J=8.6Hz), 7.12 (2H, d, J=8.6Hz), 6.55 (2H, d, J=8.6Hz), 4.01 (3H, m), 3.57 (5H, m), 3.29 (4H, t, J=6.4Hz), 2.63 (2H, m), 2.36 (4H, m), 2.14 (1H, m), 2.01 (4H, m), 1.89 (1H, m), 1.17 (3H, t, J=7.0Hz), 0.97 (3H,t,J=7.4Hz);

TLC : Rf 0.34 (hexane:ethyl acetate=1:1).

4-sulfamoylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.88 (2H, d, J=8.6Hz), 7.18 (2H, d, J=8.8Hz), 7.11 (2H, d, J=8.8Hz), 6.57 (2H, d, J=8.6Hz), 3.61 (1H, t, J=7.6Hz), 3.34-3.19 (4H, . m), 2.26-2.00 and 2.00-1.70 (each 1H, m), 2.07-1.96 (4H, m), 0.96 (3H, t, J=7.4Hz);

TLC : Rf 0.22 (acetic acid:methanol:chloroform=1:2:40).

4-(N-t-butyloxysulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.88 (2H, d, J=8.8Hz), 7.24-7.15 (4H, m), 6.56 (2H, d, J=8.2Hz), 6.44 (1H, s), 3.59 (1H, t, J=7.2Hz), 3.33-3.26 (4H, m), 2.45-1.80 (6H, m), 1.21 (9H, s), 0.98 (3H, t, J=7.2Hz);

TLC : Rf 0.40 (hexane:ethyl acetate:acetic acid=5:2:0.1).

4-(N-(carbamoylmethyl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.78 (2H, d, J=8.7Hz), 7.20 (2H, d, J=8.6Hz), 7.11 (2H, d, J=8.7Hz), 6.54 (2H, d, J=8.6Hz), 6.42-6.30 (1H, brs), 6.20-5.96 (2H, m), 3.58 (1H, t, J=7.8Hz), 3.50 (2H, s), 3.38-3.18 (4H, m), 2.26-1.74 (6H, m), 0.96 (3H, t, J=7.3Hz);

TLC : Rf 0.41 (chloroform:methanol=9:1).

4-(N-t-butylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.89 (2H, d, J=8.8Hz), 7.63 (2H, d, J=8.6Hz), 7.48 (2H, d, J=8.6Hz), 7.12 (2H, d, J=8.8Hz), 4.83 (1H, s), 3.74 (1H, t, J=7.6Hz), 3.80-3.50 (4H, m), 2.40-2.25 (4H, m), 2.40-2.10 and 2.05-1.75 (each 1H, m), 1.22 (9H, s), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.55 (ethyl acetate:hexane=1:2).

4-(N-methyl-N-methoxysulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.68 (1H, s), 7.66 (1H, d, J=8.4Hz), 7.22 (2H, d, J=8.6Hz), 7.11 (1H, d, J=8.4Hz), 6.55 (2H, d, J=8.6Hz), 3.78 (3H, s), 3.62 (1H, t, J=7.7Hz), 3.28 (4H, t, J=6.6Hz), 2.76 (3H, s), 2.3-2.1 (1H, m), 2.06 (3H, s), 2.1-1.9 (4H, m), 2.1-1.8 (1H, m), 0.99 (3H, t, J=7.3Hz);

TLC : Rf 0.36 (hexane:ethyl acetate=4:1).

4-(N-2RS,3-dihydroxypropylsulfamoyl)-2-methylphenyl 2RS-(4-methylphenyl)butanoic acid ester

NMR (CDCl₃): δ 7.67-7.61 (2H, m), 7.27 (2H, d, J=8Hz), 7.17 (2H, d, J=8Hz), 7.04 (1H, d, J=8Hz), 5.54 (1H, br), 3.80-3.46 (3H, m), 3.42 (1H, br), 3.70 (1H, t, J=8Hz), 3.11-2.87 (2H, m), 2.83 (1H, br), 2.35 (3H, s), 2.32-2.11 and 2.03-1.79 (each 1H, m), 1.98 (3H, s), 0.99 (3H, t, J=8Hz);

TLC : Rf 0.40 (chloroform:methanol:water=9:1:0.1).

4-(N-2-(pyridin-2-yl)ethylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 8.79 (1H, d, J=5.0Hz), 8.50 (1H, t, J=7.4Hz), 8.04 (1H, m), 7.90 (2H, m), 7.79 (2H, d, J=8.6Hz), 7.28 (2H, m), 7.21 (2H, d, J=8.4Hz), 6.90 (2H, m), 3.76 (1H, t, J=7.0Hz), 3.34 (4H, brs), 3.23 (4H, brs), 2.01 (5H, m), 1.80 (1H, m), 0.91 (3H, t, J=7.0Hz);

TLC : Rf 0.48 (chloroform:methanol:water=9:1:0.1).

4-(N-2-(piperidin-1-yl)ethylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.92 (2H, d, J=8.8Hz), 7.71 (2H, d, J=8.8Hz), 7.63 (2H, d, J=8.8Hz), 7.26 (2H, d, J=8.8Hz), 3.95 (1H, t, J=7.2Hz), 3.81 (4H, m), 3.55 (2H, brd, J=12.0Hz), 3.24 (4H, brs), 2.98 (2H, brt, J=12.0Hz), 2.32 (4H, m), 1.89 (7H, m), 1.55 (1H, m), 0.99 (3H, t, J=7.2Hz);

TLC : Rf 0.39 (chloroform:methanol:water=9:1:0.1).

4-(N-(tetrazol-5-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CD₃OD): δ 7.89 (2H, d, J=8.6Hz), 7.15 (2H, d, J=8.6Hz), 7.02 (2H, d, J=8.6Hz), 6.55 (2H, d, J=8.6Hz), 3.58 (1H, t, J=7.8Hz), 3.35-3.15 (4H, m), 2.20-1.95 and 1.95-1.70 (each 1H, m), 2.05-1.95 (4H, m), 0.93 (3H, t, J=7.2Hz);

TLC : Rf 0.46 (acetic acid:methanol:chloroform=1:5:25).

4-(N-(morpholin-4-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.97 (2H, d, J=8.6Hz), 7.61 (2H, d-like), 7.48 (2H, d-like), 7.16 (2H, d, J=8.6Hz), 5.99 (1H, s), 3.74 (1H, t, J=7.8Hz), 3.76-3.63 (4H, m), 3.65-3.54 (4H, m), 2.70-2.58 (4H, m), 2.42-2.29 (4H, m), 2.37-2.10 and 2.04-1.77 (each 1H, m), 1.00 (3H, t, J=7.2Hz);

TLC : Rf 0.45 (methanol:chloroform=1:20).

4-(N-(pyrrolidin-3-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CDCl₃): δ 7.7-7.5 (4H, m), 7.42 (2H, d, J=8.6Hz), 6.96 and 6.92 (2H, d, J=8.6Hz), 4.35-4.13 (1H, m), 3.5-2.9 (10H, m), 2.40-2.25 (4H, m), 2.20-1.55 (4H, m), 0.94 (3H, t, J=7.2Hz);

TLC : Rf 0.35 (methanol:chloroform=1:10).

4-(N-(1-benzylpiperidin-4-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.82 (2H, d, J=9.0Hz), 7.36-7.08 (5H, m), 7.21 (2H, d, J=9.0Hz), 7.13 (2H, d, J=8.8Hz), 6.55 (2H, d, J=8.8Hz), 4.50 (1H, d, J=5.7Hz), 3.58 (1H, t, J=5.0Hz), 3.43 (2H, s), 3.36-3.21 (4H, m), 3.21-3.02 (1H, m), 2.78-2.61 (2H, m), 2.28-1.65 (10H, m), 1.56-1.34 (1H, m), 0.97 (3H, t, J=7.2Hz);

TLC : Rf 0.60 (ethyl acetate:hexane=9:1).

4-(N-(pyridin-2-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CDCl₃): δ 8.26 (1H, d, J=6.0Hz), 7.96 (2H, d, J=8.6Hz), 7.83 (1H, t, J=8.6Hz), 7.72 (2H, d, J=9.0Hz), 7.55 (1H, d, J=8.6Hz), 7.48 (2H, d, J=8.6Hz), 7.12 (2H, d, J=6.6Hz), 6.95 (1H, t, J=6.0Hz), 3.74 (1H, t, J=7.6Hz), 3.80-3.60 (4H, m), 2.44-2.24 (4H, m), 2.32-2.02 and 2.02-1.72 (each 1H, m), 0.97 (3H, t, J=7.2Hz);

TLC : Rf 0.51 (ethyl acetate:hexane=2:1).

4-(N-2-(morpholin-4-yl)ethylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.83 (2H, d, J=8.9Hz), 7.21 (2H, d, J=8.7Hz), 7.13 (2H, d, J=8.9Hz), 6.55 (2H, d, J=8.7Hz), 6.23-5.06 (1H, brs), 3.64-3.52 (5H, m), 3.36-3.20 (4H, m), 2.98 (2H, t, J=6.0Hz), 2.38 (2H, t, J=6.0Hz), 2.30-2.20 (4H, m), 2.20-1.70 (6H, m), 0.97 (3H, t, J=7.2Hz);

TLC : Rf 0.24 (ethyl acetate:hexane=7:3).

4-(N-(pyrazin-2-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 3hydrochloride

NMR (CDCl₃): δ 8.46 (1H, s), 8.17 (2H, s), 8.01 (2H, d, J=8.2Hz), 7.7-7.4 (4H, m), 7.14 (2H, d, J=8.2Hz), 3.9-3.5 (5H, m), 2.5-2.2 (4H, m), 2.4-2.1 and 2.1-1.8 (each 1H, m), 0.98 (3H, t, J=7.2Hz);

TLC : Rf 0.18 (hexane:ethyl acetate=1:1).

4-(N-(imidazol-2-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.90 (2H, d, J=8.8Hz), 7.19 (4H, d, J=8.8Hz), 6.81 (1H, d, J=2.0Hz), 6.54 (1H, d, J=2.0Hz), 6.54 (2H, d, J=8.8Hz), 3.57 (1H, t, J=7.8Hz), 3.28 (4H, t-like), 2.30-2.00 and 2.00-1.70 (each 1H, m), 2.00 (4H, t-like), 0.96 (3H, t, J=7.4Hz);

TLC : Rf 0.67 (methanol:chloroform=1:10).

4-(N-(quinuclidin-3RS-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.88 (2H, d, J=8.8Hz), 7.21 (2H, d, J=8.8Hz), 7.11 (2H, d, J=8.8Hz), 6.55 (2H, d, J=8.8Hz), 3.58 (1H, t, J=7.6Hz), 3.60-3.47 (1H, m), 3.35-3.20 (4H, m), 3.30-2.80 (6H, m), 2.10-1.95 (4H, m), 2.30-1.40 (7H, m), 0.98 (3H, t, J=7.2Hz);

TLC : Rf 0.43 (acetic acid:methanol:chloroform=1 :5:25).

4-(N-(2,2,6,6-tetramethylpiperidin-4-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃+CD₃OD): δ 7.85 (2H, d, J=8.8Hz), 7.22 (2H, d, J=8.6Hz), 7.14 (2H, d, J=8.8Hz), 6.57 (2H, d, J=8.6Hz), 3.59 (1H, t, J=7.8Hz), 3.60-3.42 (1H, m), 3.35-3.20 (4H, m), 2.30-1.75 (2H, m), 2.06-1.96 (4H, m), 1.63 (2H, dd, J=13.2 and 3.8Hz), 1.33-1.08 (2H, m), 1.19 (12H, s), 0.98 (3H, t, J=7.3Hz);

TLC : Rf 0.55 (chloroform:methanol:acetic acid=25:5:1).

4-(N-(quinuclidin-3RS-yl)sulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.69 (1H, d, J=2Hz), 7.66 (1H, dd, J=8 and 2Hz), 7.30-7.13 (2H, m), 7.06 (1H, d, J=8Hz), 6.55 (2H, d, J=9Hz), 3.62 (1H, t, J=8Hz), 3.38-3.23 (5H, m), 3.23-3.05 (1H, m), 2.90-2.48 (5H, m), 2.32-2.08 (1H, m), 2.04 (3H, s), 2.08-1.03 (10H, m), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.43 (chloroform:methanol:water=8:2:0.2).

4-(N-2-(morpholin-4-yl)ethylsulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 11.3-11.1 (1H, brs), 8.18 (1H, brs), 7.75 (1H, s), 7.70 (1H, d, J=8.0Hz), 7.27 (2H, d, J=8.6Hz), 7.18 (2H, d, J=9.2Hz), 4.0-3.7 (5H, m), 3.4-3.0 (12H, m), 2.2-2.0 (1H, m), 2.1-1.9 (4H, brs), 2.0-1.7 (1H, m), 1.98 (3H, s), 0.91 (3H, t, J=7.3Hz);

TLC : Rf 0.50 (chloroform:methanol=9:1).

4-(N-2-(piperazin-4-yl)ethylsulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 3hydrochloride

NMR (DMSO-d₆): δ 9.6-9.2 (2H, br), 7.71 (1H, s), 7.67 (1H, d, J=8.0Hz), 7.18 (2H, d, J=8.4Hz), 7.14 (1H, d, J=8.0Hz), 6.53 (2H, d, J=8.4Hz), 3.69 (1H, t, J=7.3Hz), 3.7-2.6 (16H, br), 2.2-2.0 (1H, m), 2.0-1.9 (4H, brs), 1.96 (3H, s), 1.9-1.7 (1H, m), 0.90 (3H, t, J=7.1 Hz);

TLC : Rf 0.46 (chloroform:methanol:acetic acid=25:5:1).

4-(N-(piperidin-4-yl)sulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 9.1-8.7 (1H, br), 8.00 (1H, d, J=7.2Hz), 7.71 (1H, s), 7.68 (1H, d, J=8.4Hz), 7.26 (2H, d, J=8.4Hz), 7.15 (1H, d, J=8.4Hz), 6.79 (2H, d, J=8.4Hz), 3.76 (1H, t, J=7.8Hz), 3.4-3.2 (4H, brs), 3.2-3.0 (3H, br), 3.0-2.7 (2H, br), 2.2-1.9 (1H, m), 1.99 (4H, brs), 1.97 (3H, s), 1.9-1.5 (5H, m), 0.91 (3H, t, J=7.3Hz);

TLC : Rf 0.46 (chloroform:methanol:acetic acid=25:5:1).

4-(N-2R-methoxy-3R-hydroxy-4S-hydroxy-5R-hydroxyperhydropyran-6R-ylmethylsulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃+6 drops of CD₃OD): δ 7.68-7.63 (m, 2H), 7.22 (d, J=8.8Hz, 2H), 7.05 (d, J=8.1 Hz, 1H), 6.55 (d, J=8.8Hz, 2H), 4.63 (d, J=3.7Hz, 1H), 3.70-3.50 (m, 3H), 3.50-3.10 (m, 11H), 2.30-1.80 (m, 9H), 0.99 (t, J=7.4Hz, 3H);

TLC : Rf 0.41 (chloroform:methanol=8:1).

4-(2-(piperidin-1-yl)ethylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ7.7-7.4 (m, 2H), 7.23 (d, J=8.7Hz, 2H), 7.05 (d, J=8.4Hz, 1H), 6.56 (d, J=8.7Hz, 2H), 3.61 (t, J=7.4Hz, 1H), 3.4-3.2 (m, 4H), 3.1-2.9 (m, 2H), 2.5-2.4 (m, 2H), 2,4-2.3 (m, 4H), 2.3-1.8 (m, 2H), 2.1-1.9 (m, 4H), 2.03 (s, 3H), 1.6-1.3 (m, 6H), 0.99 (t, J=7.4Hz, 3H);

TLC : Rf 0.55 (chloroform:methanol=7:1).

4-(3-(morpholin-4-yl)propylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CDCl₃): δ7.8-7.4 (m, 5H), 7.3-7.0 (m, 3H), 4.3-3.4 (m, 11H), 3.2-2.8 (m, 6H), 2.4-1.8 (m, 11H), 0.99 (t, J=7.2Hz, 3H);

TLC : Rf 0.56 (chloroform:methanol=9:1).

4-(indolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ7.66-7.51 (3H, m), 7.24-6.88 (6H, m), 6.53 (2H, d, J=8.8Hz), 3.88 (2H, t, J=8.4Hz), 3.58 (1H, t, J=7.8Hz), 3.27 (4H, m), 2.89 (2H, t, J=8.4Hz), 2.29-1.72 (9H, m), 0.96 (3H, t, J=7.2Hz);

TLC : Rf 0.80 (hexane:ethyl acetate=1:1).

4-(N-2-(morpholin-4-yl)ethyl-N-methoxyaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (DMSO-d₆): δ7.85-7.65 (2H, m), 7.27 (3H, d, J=8.0Hz), 6.95-6.70 (2H, brd), 4.05-3.70 (5H, m), 3.85 (3H, s), 3.50-2.95 (12H, m), 2.30-1.65 (6H, m), 2.02 (3H, s), 0.92 (3H, t, J=7.5Hz);

TLC : Rf 0.52 (hexane:ethyl acetate=2:1).

4-(5-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ8.10 (1H, d, J= 9.0Hz), 7.95 (1H, s), 7.72-7.56 (3H, m), 7.18 (2H, d, J=8.0Hz), 7.05 (1H, d, J=8.0Hz), 6.52 (2H, d, J=8.0Hz), 4,01 (2H, t, J=8.5Hz), 3.58 (1H, t, J=7.5Hz), 3.35-3.18 (4H, m), 3.08 (2H, t, J=8.5Hz), 2.30-1.70 (6H, m), 2.00 (3H, s), 0.96 (3H, t, J=7.5Hz);

TLC : Rf 0.60 (hexane:ethyl acetate=2:1).

4-(morpholin-4-ylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ7.84-7.70 (2H, m), 7.64 (4H, s-like), 7.13 (1H, d, J=8.2Hz), 3.97 (1H, t, J=7.4Hz), 3.87-3.66 (4H, m), 3.54 (4H, t, J=4.4Hz), 2.55 (4H, t, J=4.4Hz), 2.43-2.14 (5H, m), 2.14-1.80 (4H, m), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.51 (hexane:ethyl acetate=1:1).

4-(5-(N,N-dimethylamino)indolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2 hydrochloride

NMR (CD₃OD): δ7.78-7.64 (3H, m), 7.60 (4H, s-like), 7.52-7.42 (2H, m), 7.11 (1H, d, J=8.4Hz), 4.01 (2H, t, J=8.5Hz), 3.93 (1H, t, J=8.4Hz), 3.87-3.70 (4H, m), 3.23 (6H, s), 3.06 (2H, t, J=8.5Hz), 2.40-2.10 (5H, m), 2.10-1.80 (4H, m), 0.97 (3H, t, J=7.2Hz);

TLC : Rf 0.24 (hexane :ethyl acetate=3:1).

4-(4-methylpiperazin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2 hydrochloride

NMR (CD₃OD): δ7.75-7.59 (6H, m), 7.23 (1H, d, J=8.2Hz), 4.06-3.84 (3H, m), 3.84-3.68 (4H, m), 3.64-3.49 (2H, m), 3.32-3.11 (2H, m), 2.89 (3H, s), 2.84-2.64 (2H, m), 2.44-2.14 (5H, m), 2.13-1.82 (4H, m), 1.00 (3H, t, J=7.2Hz);

TLC : Rf 0.36 (ethyl acetate).

4-(5-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ8.10 (1H, dd, J=9.0, 2.2Hz), 7.95 (1H, d, J=2.2Hz), 7.66 (1H, d, J=9.0HZ), 7.66 (1H, s), 7.63 (1H, d, J=8.2Hz), 7.18 (2H, d, J=8.8Hz), 7.05 (1H, d, J=8.2Hz), 6.53 (2H, d, J=8.8Hz), 4.01 (2H, t, J=8.5Hz), 3.58 (1H, t, J=7.7Hz), 3.3-3.2 (4H, brs), 3.08 (2H, t, J=8.5Hz), 2.3-2.0 (1H, m), 2.1-1.9 (4H, brs), 2.00 (3H, s), 2.0-1.8 (1H, m), 0.96 (3H, t, J=7.3Hz);

TLC : Rf 0.60 (hexane:ethyl acetate=2:1).

4-(2-(morpholin-4-yl)ethylaminosulfonyl)-2-ethylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester - 2hydrochloride

NMR (CD₃OD): δ7.83-7.58 (6H, m), 7.18 (1H, d, J=8.0Hz), 4.12-3.70 (9H, m), 3.53 (2H, d, J=12.0Hz), 3.38-3.08 (6H, m), 2.45-1.80 (8H, m), 1.00 (6H, t, J=7.5Hz);

TLC : Rf 0.41 (hexane:ethyl acetate=1:4).

4-(2-(morpholin-4-yl)ethylaminosulfonyl)-2-ethylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ7.83-7.58 (6H, m), 7.19 (1H, d, J=8.0Hz), 4.12-3.70 (9H, m), 3.53 (2H, d, J=12.0Hz), 3.40-3.08 (6H, m), 2.50-1.80 (8H, m), 0.99 (6H, t, J=7.5Hz);

TLC : Rf 0.41 (hexane:ethyl acetate=1:4).

4-(2-(morpholin-4-yl)ethylaminosulfonyl)-2-methylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ11.0-10.8 (1H, brs), 7.75 (1H, s), 7.70 (1H, d, J=8.6Hz), 7.22 (2H, d, J=8.4Hz), 7.18 (1H, d, J=8.6Hz), 6.64 (2H, d, J=8.4Hz), 4.0-3.7 (5H, m), 3.4-3.0 (12H, m), 2.2-2.0 (1H, m), 2.1-1.9 (4H, brs), 2.0-1.7 (1H, m), 1.97 (3H, s), 0.91 (3H, t, J=7.3Hz);

TLC : Rf 0.50 (chloroform:methanol=9:1).

4-(2-(morpholin-4-yl)ethylaminosulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ11.4-11.2 (1H, brs), 7.76 (1H, s), 7.70 (1H, d, J=8.6Hz), 7.30 (2H, d, J=8.4Hz), 7.18 (1H, d, J=8.6Hz), 6.87 (2H, d, J=8.4Hz), 4.0-3.7 (5H, m), 3.5-3.3 (6H, m), 3.3-3.0 (6H, m), 2.2-2.0 (1H, m), 2.1-1.9 (4H, brs), 2.0-1.7 (1H, m), 1.98 (3H, s), 0.91 (3H, t, J=7.2Hz);

TLC : Rf 0.50 (chloroform:methanol=9:1).

4-(4-methyl-1,4-perhydrodiazepin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ7.72 (1H, d, J=2Hz), 7.66 (1H, dd, J=2 and 8Hz), 7.25 (2H, d, J=8Hz), 7.19 (1H, d, J=8Hz), 6.76 (2H, d-like), 3.76 (1H, t, J=7Hz), 3.75-3.01 (12H, m), 2.76 and 2.74 (total 3H, each s), 2.21-1.66 (8H, m), 1.99 (3H, s), 0.91 (3H, t, J=7Hz);

TLC : Rf 0.52 (chloroform:methanol:water=9:1:0.1).

4-(quinuclidin-3RS-ylaminosulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ8.35 (1H, d, J=7Hz), 7.74-7.64 (2H, m), 7.26 (2H, d, J=8Hz), 7.17 (1H, d, J=8Hz), 6.82-6.70 (2H, br), 3.75 (1H, t, J=7Hz), 3.61-3.43 (1H, br), 3.40-3.22 (5H, m), 3.18-2.94 (5H, m), 2.90-2.79 (1H, m), 2.17-1.60 (13H, m), 0.91 (3H, t, J=7Hz);

TLC : Rf 0.35 (chloroform:methanol:water=8:2:0.2).

4-(2-(morpholin-4-yl)ethylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2methanesulfonic acid salt

NMR (CD₃OD): δ7.80-7.70 (2H, m), 7.67 (4H, s), 7.17 (1H, d, J=8.0Hz), 4.10-3.70 (9H, m), 3.54 (2H, d, J=12.0Hz), 3.40-3.10 (6H, m), 2.70 (6H, s), 2.40-1.80 (6H, m), 2.05 (3H, s), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.31 (chloroform:methanol:acetic acid=40:2:1).

4-(5-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ8.11 (1H, dd, J=2.0, 9.0Hz), 7.96 (1H, d, J=2.0Hz), 7.72-7.60 (3H, m), 7.55 (2H, d, J=8.0Hz), 7.44 (2H, d, J=8.0Hz), 7.06 (1H, d, J=8.0Hz), 4.03 (2H, t, J=8.5Hz), 3.75 (1H, t, J=7.5Hz), 3.85-3.40 (4H, m), 3.10 (2H, t, J=8.5Hz), 2.45-2.20 (4H, m), 2.40-1.75 (2H, m), 2.02 (3H, s), 0.98 (3H, t, J=7.5Hz);

TLC : Rf 0.60 (hexane:ethyl acetate=2:1).

4-(5-nitroindolin-1-ylsulfonyl)-2-methylphenyl 2 RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · methanesulfonic acid salt

NMR (CDCl₃): δ8.11 (1H, dd, J=2.5, 9.0Hz), 7.97 (1H, d, J=2.5Hz), 7.74-7.62 (3H, m), 7.57 (2H, d, J=8.5Hz), 7.49 (2H, d, J=8.5Hz), 7.07 (1H, d, J=8.0Hz), 4.03 (2H, t, J=8.5Hz), 3.77 (1H, t, J=7.5Hz), 4.10-3.30 (4H, m), 3.11 (2H, t, J=8.5Hz), 2.85 (3H, s), 2.50-2.20 (4H, m), 2.40-2.10 and 2.10-1.80 (each 1H, m), 2.04 (3H, s), 0.99 (3H, t, J=7.5Hz) ;

TLC : Rf 0.60 (hexane:ethyl acetate=2:1).

4-(indolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ7.65-7.53 (3H, m), 7.32 (2H, d, J=8.4Hz), 7.24-6.90 (6H, m), 3.89 (2H, t, J=8.5Hz), 3.66 (1H, t, J=8.2Hz), 3.45 (4H, brs), 2.89 (2H, t, J=8.5Hz), 2.34-2.04 (5H, m), 1.97 (3H, s), 2.04-1.73 (1H, m), 0.97 (3H, t, J=7.2Hz);

TLC : Rf 0.42 (hexane:ethyl acetate=3:1).

4-(2S-carboxypyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

To a mixture solution of the compound prepared in example 1 (1.04 g) in dichloromethane(5 ml) and anisole (5 ml) were slowly added trifluoroacetic acid (5 ml) at 0 °C. The reaction mixture was stirred for 6h at room temperature. The reaction mixture was concentrated, and the residue was purified by column chromatography on silica gel (chloroform:methanol=20:1) to give N-{4-[2RS-(4-(1-pyrrolidinyl)phenyl)butylyloxy]-3-methylphenyl sulfonyl}-L-proline. The obtained above compound was converted tc hydrochloride salt by the following method. To a solution of N-{4-[2RS-(4-(1-pyrrolidinyl)phenyl)butylyloxy]-3-methylphenyl sulfonyl}-L-proline in dioxane (5 ml) was added 4N hydrochloric acid in dioxane solution (1 ml) at 0 °C. The reaction mixture was stirred for 5 min, and reaction mixture was concentrated to give the title compound (1 g) having the following physical data.

NMR (CDCl₃): δ 7.70 (1H, s), 7.67 (1H, d, J=8.0Hz), 7.59 (2H, d, J=8.5Hz), 7.49 (2H, d, J=8.5Hz), 7.07 (1H, d, J=8.0Hz), 4.26 (1H, dd, J=3.5, 7.0Hz), 3.78 (1H, t, J=7.5Hz), 3.75-3.60 (4H, m), 3.52-3.40 (1H, m), 3.33-3.14 (1H, m), 2.40-2.25 (4H, m), 2.40-1.65 (6H, m), 2.04 (3H, s), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.39 (acetic acid:methanol:chloroform=1:2:40).

By the same procedure as Preparation example 1 and example 2 and by known methods converted to corresponding salts, acid addition salts or solvates, the compounds having the following physical data were given by using corresponding phenol derivatives instead of the compound prepared in reference example 4 and by using corresponding carboxylic acid derivatives instead of the compound prepared in reference example 7.

4-(2S-carboxypyrrolidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ7.86 (2H, d, J=8Hz), 7.24 (4H, d, J=8Hz), 6.78 (2H. d. J=8Hz), 4.15-4.05 (1H, m), 3.73 (1H, t, J=7Hz), 3.40-3.05 (6H, m), 2.20-1.45 (10H, m), 0.89 (3H, t, J=7Hz);

TLC : Rf 0.26 (acetic acid:methanol:chloroform=1:2:60).

4-(2R-carboxypyrrolidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (DMSO-d₆): δ7.86 (2H, d, J=8.8Hz), 7.25 (4H, d, J=8.8Hz), 6.78 (2H, d, J=8.8Hz), 4.16-4.05 (1H, m), 3.74 (1H, t, J=7.2Hz), 3.44-3.06 (2H, m), 3.36-3.24 (4H, m), 2.22-1.46 (10H, m), 0.90 (3H, t, J=7.2Hz);

TLC : Rf 0.39 (acetic acid:methanol:chloroform=1:2:40).

4-(2S-carboxy-4R-benzyloxypyrrolidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.84 (2H, d, J=9Hz), 7.62 (2H, d, J=9Hz), 7.47 (2H, d, J=9Hz), 7.34-7.19 (3H, m), 7.17-7.00 (4H, m), 4.30 (1H, t, J=8Hz), 4.23 (2H, s), 4.15-4.03 (1H, m), 3.86-3.42 (7H, m), 2.47-2.05 (7H, m), 2.05-1.74 (1H, m), 0.97 (3H, t, J=7Hz);

TLC : Rf 0.35 (chloroform:methanol:acetic acid=40:2:1).

4-(2S-carboxy-4S-aminopyrrolidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 8.55-8.20 (2H, brs), 7.89 (2H, d, J=9Hz), 7.29 (2H, d, J=9Hz), 7.25 (2H, d, J=9Hz), 6.73 (2H, d, J=9Hz), 5.80-4.40 (1H, m), 4.18 (1H, t, J=7Hz), 3.74 (1H, t, J=7Hz), 3.64-3.10 (7H, m), 2.67-2.40 (1H, m), 2.20-1.65 (7H, m), 0.90 (3H, t, J=7Hz);

TLC : Rf 0.49 (ethyl acetate:acetic acid:water=6:2:1).

4-(2S-carboxy-4R-aminopyrrolidin-1-ylsulfonyl)phenyl 2RS -(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 8.60-8.30 (2H, brs), 7.88 (2H, d, J=9Hz), 7.28 (2H, d, J=9Hz), 7.23 (2H, d, J=9Hz), 6.72 (2H, d, J=9Hz), 5.40-4.20 (1H, m), 4.40 (1H, dd, J=9Hz, 4Hz), 3.90-3.50 (2H, m), 3.50-3.10 (6H, m), 2.33-1.60 (8H, m), 0.90 (3H, t, J=7Hz);

TLC : Rf 0.42 (ethyl acetate :acetic acid:water=6:2:1).

4-(2S-(2-aminoethoxycarbonyl)pyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 8.21 (2H, brs), 7.75 (1H, s), 7.69 (1H, d, J=8.2Hz), 7.22 (3H, m), 6.70 (2H, d, J=8.8Hz), 4.26 (3H, m), 3.50-3.36 (2H, m), 3.31 (4H, m). 3.20 (1H, m), 3.08 (2H, m), 2.12 (1H, m), 2.00 (3H, s), 1.96 (4H, m), 1.87 (4H, m), 1.66 (1H, m), 0.92 (3H, t, J=7.2Hz);

TLC : Rf 0.31 (chloroform:methanol:acetic acid=12:1:1).

4-(2S-hydroxymethylpyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.70-7.58 (2H, m), 7.22 (2H, d, J=8.5Hz), 7.09 (1H, d, J=8.0Hz), 6.55 (2H, d, J=8.5Hz), 3.80-3.52 (3H, m), 3.62 (1H, t, J=7.5Hz), 3.52-3.35 (1H, m), 3.35-3.12 (5H, m), 2.90-2.55 (1H, brs), 2.35-1.70 (2H, m), 2.05 (3H, s), 2.05-1.95 (4H, m), 1.80-1.30 (4H, m), 0.99 (3H, t, J=7.5Hz);

TLC : Rf 0.36 (hexane:ethyl acetate=1:1).

NMR (DMSO-d₆): δ 12.9-12.6 (1H, brs), 8.28 (2H, d, J=8.8Hz), 7.87 (2H, d, J=8.8Hz), 7.71 (2H, d, J=8.8Hz), 7.31 (2H, d, J=8.8Hz), 4.16-4.04 (1H, m), 3.43-3.10 (2H, m), 3.10-2.90 (2H, m), 2.75-2.55 (2H, q-like), 2.28-1.46 (6H, m);

TLC : Rf 0.46 (acetic acid:methanol:chloroform=1:2:40).

4-(2RS-carboxyindolin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.73 (2H, d, J=8.6Hz), 7.58 (1H, d, J=8.2Hz), 7.17 (2H, d, J=8.6Hz), 7.12-6.94 (5H, m), 6.53 (2H, d, J=8.8Hz), 4.73 (1H, dd, J=8.9Hz and 6.8Hz), 3.54 (1H, t, J=7.8Hz), 3.35-3.21 (4H, m), 3.17 (2H, d, J=6.8Hz), 2.25-1.70 (2H, m), 2.05-1.94 (4H, m), 0.95 (3H, t, J=7.2Hz);

TLC : Rf 0.46 (acetic acid:methanol:chloroform=1:2:40).

4-(2-carboxyindol-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 8.08 (2H, d, J=8.8Hz), 8.01 (1H, d, J=8.4Hz), 7.68 (1H, d, J=8.0Hz), 7.46 (1H, m), 7.40-7.16 (2H, m), 7.24 (2H, d, J=8.8Hz), 7.20 (2H, d, J=8.6Hz), 6.85-6.60 (2H, m), 3.69 (1H, t, J=7.4Hz), 3.40-3.15 (4H, m), 2.20-1.84 (5H, m), 1.84-1.60 (1H, m), 0.86 (3H, t, J=7.4Hz);

TLC : Rf 0.20 (chloroform:methanol:water=9:1:0.1).

4-(2S-carboxyindolin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.72 (2H, d, J=8.6Hz), 7.57 (1H, d, J=7.8Hz), 7.17 (2H, d, J=8.6Hz), 7.28-6.88 (5H, m), 6.53 (2H, d, J=8.6Hz), 4.72 (1H, dd, J=5.8Hz and 9.1 Hz), 3.54 (1H, t, J=7.8Hz), 3.35-3.22 (4H, m), 3.22-3.08 (2H, m), 2.25-1.70 (2H, m), 2.05-1.95 (4H, m), 0.95 (3H, t, J=7.2Hz);

TLC : Rf 0.46 (acetic acid:methanol:chloroform=1:2:40).

4-(2S-carboxyperhydroindol-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.89 (2H, d, J=8.8Hz), 7.71 (2H, d, J=8.6Hz), 7.51 (2H, d, J=8.6Hz), 7.17 (2H, d, J=8.8Hz), 4.20 (1H, t, J=8.6Hz), 4.0-3.5 (6H, m), 2.5-2.2 (4H, m), 2.4-1.0 (13H, m), 0.99 (3H, t, J=7.4Hz);

TLC : Rf 0.60 (chloroform:methanol:acetic acid=40:2:1).

4-(2RS-carboxyindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 7.79 (1H, d-like), 7.67 (1H, dd, J=2.2 and 8.4Hz), 7.35-6.95 (7H, m), 6.71-6.67 (2H, m), 4.97 (1H, dd, J=4.4 and 10.7Hz), 3.71 (1H, t, J=7.6Hz), 3.35-2.96 (6H, m), 2.14-1.68 (2H, m), 2.00-1.94 (4H, m), 1.91 (3H, s), 0.87 (3H, t, J=7.2Hz);

TLC : Rf 0.45 (chloroform:methanol:water=8:2:0.2).

4-(2RS-carboxyindolin-1-ylsulfonyl)phenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.72 (2H, d, J=8Hz), 7.59 (1H, d, J=8Hz), 7.27-7.03 (7H, m), 6.54 (2H, d, J=8Hz), 6.08 (1H, br), 4.77-4.69 (1H, m), 3.55 (1H, t, J=8Hz), 3.31-3.24 (4H, m), 3.19-3.15 (2H, m), 2.20-1.76 (2H, m), 2.03-1.96 (4H, m), 0.95 (3H, t, J=8Hz);

TLC : Rf 0.45 (chloroform:methanol:water=8:2:0.2).

4-(2RS-carboxy-3,3-dimethylindolin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.83 (2H, d, J=8.5Hz), 7.55 (1H, d, J=8.0Hz), 7.25-6.93 (3H, m), 7.17 (2H, d, J=8.5Hz), 7.09 (2H, d, J=8.5Hz), 6.53 (2H, d, J=8.5Hz), 4.36 (1H, s), 3.54 (1H, t, J=8.0Hz), 3.35-3.10 (4H, m), 2.05-1.90 (4H, m), 2.25-1.70 (2H, m), 1.31 (3H, s), 1.04 (3H, s), 0.94 (3H, t, J=7.5Hz);

TLC : Rf 0.48 (chloroform:methanol:acetic acid=40:2:1).

4-(2RS-(N-2-hydroxyethylcarbamoyl)indolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.72 (1H, d, J=8.0Hz), 7.45-6.92 (9H, m), 6.51 (2H, d, J=8.6Hz), 4.57 (1H, dd, J=2.8, 10.6Hz), 3.77-3.52 (5H, m), 3.39-3.17 (5H, m), 2.88 (1H, dd, J=10.6, 16.8Hz), 2.23-1.78 (6H, m), 1.92 (3H, s), 0.96 (3H, t, J=7.4Hz);

TLC : Rf 0.43 (chloroform:methanol:acetic acid=25:5:1).

4-(2-carboxy-5,6-dimethoxyindol-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.78-7.62 (3H, m), 7.35 (1H, s), 7.18 (2H, d, J=9Hz), 7.00 (1H, d, J=8Hz), 6.95 (1H, s), 6.52 (2H, d, J=9Hz), 4.00 (3H, s), 3.91 (3H, s). 3.70-3.10 (1H, brs), 3.57 (1H, t, J=7Hz), 3.35-3.18 (4H, m), 2.25-1.75 (9H, m), 0.96 (3H, t, J=7Hz).

TLC : Rf 0.19 (ethyl acetate:hexane:acetic acid=5:10:0.5).

4-(2RS-(2-aminoethyl)oxycarbonylindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2hydrochloride

NMR (DMSO-d₆): δ 8.30 (2H, brs), 7.76 (1H, s), 7.66 (1H, d, J=8.0Hz), 7.37 (1H, d, J=8.0Hz), 7.23-7.00 (6H, m), 6.70 (2H, d, J=8.0Hz), 5.08 (1H, dd, J=6.2, 9.4Hz), 4.37-4.32 (2H, m), 3.69 (1H, t, J=7.2Hz), 3.35-3.07 (8H, m), 2.14-1.69 (9H, m), 0.89 (3H, t ,J=7.2Hz);

TLC : Rf 0.46 (chloroform:methanol:acetic acid=25:5:1).

4-(2-carboxyindol-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 8.13 (1H, d, J=9Hz), 7.90-7.78 (2H, m), 7.60 (1H, d, J=9Hz), 7.46 (1H, td, J=8.1Hz), 7.39 (1H, s), 7.35-7.25 (1H, m), 7.21 (2H, d, J=9Hz), 6.75-6.50 (2H, m), 3.59 (1H, t, J=7Hz), 3.38-3.23 (4H, m), 3.23-2.90 (1H, brs), 2.25-1.75 (6H, m), 0.96 (3H, t, J=7Hz);

TLC : Rf 0.20 (ethyl acetate:hexane:acetic acid=5:10:0.5).

4-(2RS-carboxy-5,6-dimethoxyindolin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃+CD₃OD): δ 7.6-7.4 (m, 2H), 7.26 (s, 1H), 7.19 (d, J=8.7Hz, 2H), 6.96 (dd, J=1.2, 8.4Hz, 1H), 6.58 (s, 1H), 6.54 (d, J=8.7Hz, 2H), 4.7-4.6 (m, 1H), 3.91 (s, 3H), 3.79 (s, 3H), 3.58 (t, J=7.7Hz, 1H), 3.4-3.2 (m, 4H), 3.1-2.9 (m, 2H), 2.3-1.8 (m, 6H), 1.94 (s, 3H), 0.96 (t, J=7.4Hz, 3H);

TLC : Rf 0.45 (chloroform:methanol=4:1).

4-(2RS-carboxyindolin-1-ylsulfonyl)phenyl 2RS-(2-methoxyphenyl)butanoic acid ester

NMR (CDCl₃): δ 7.75 (2H, d, J=8.8Hz), 7.58 (1H, d, J=8.0Hz), 7.25 (2H, d, J=8.8Hz), 7.31-6.87 (7H, m), 4.74 (1H, t, J=8.0Hz), 4.04 (1H, t, J=7.2Hz), 3.84 (3H, s), 3.18 (2H, brd, J=7.2Hz), 2.22-2.05 (1H, m), 1.96-1.74 (1H, m), 0.95 (3H, t, J=7.6Hz);

TLC : Rf 0.48 (chloroform:methanol:acetic acid=40:2:1).

4-(2-carboxyindol-1-ylsulfonyl)-2-methylphenyl 2RS-(4-methylphenyl)butanoic acid ester

NMR (CDCl₃): δ 8.14 (1H, d, J=9Hz), 7.90-7.78 (2H, m), 7.60 (1H, d, J=9Hz), 7.52-7.41 (1H, m), 7.39 (1H, s), 7.35-7.10 (5H, m), 7.03 (1H, d, J=9Hz), 4.00-3.60 (1H, br), 3.66 (1H, t, J=7Hz), 2.33 (3H, s), 2.30-2.07 (1H, m), 2.00-1.75 (1H, m), 1.97 (3H, s), 0.96 (3H, t, J=7Hz);

TLC : Rf 0.28 (ethyl acetate:hexane:acetic acid=5:10:0.5).

4-(4S-carboxyperhydrothiazol-3-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butancic acid ester · hydrochloride

NMR (CDCl₃): δ 7.85 (2H, d, J=8.8Hz), 7.21 (2H, d, J=8.8Hz), 7.17 (2H, d, J=8.8Hz), 6.57 (2H, d, J=8.8Hz), 4.83 (1H, dd, J=7.0 and 3.4Hz), 4.67 (1H, d, J=9.0Hz), 4.40 (1H, d, J=9.0Hz), 3.59 (1H, t, J=7.6Hz), 3.40-3.18 (5H, m), 3.01 (1H, dd, J=11.4 and 7.0Hz), 2.30-2.05 and 2.05-1.75 (each 1H, m), 2.10-1.95 (4H, m), 0.98 (3H, t, J=7.6Hz);

TLC : Rf 0.36 (acetic acid:methanol:chloroform=1:2:40).

4-(4-carboxypiperidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃):δ7.71 (2H, d, J=8.8Hz), 7.21 (2H, d, J=8.8Hz), 7.17 (2H, d, J=8.8Hz), 6.55 (2H, d, J=8.8Hz), 3.72-3.54 (2H, m), 3.59 (1H, t, J=7.6Hz), 3.36-3.20 (4H, m), 2.45 (2H, t-like) 2.38-1.70 (7H, m), 2.08-1.94 (4H, m), 0.98 (3H, t, J=7.4Hz);

TLC : Rf 0.34 (acetic acid:methanol:chloroform=1 :2:40).

4-(2RS-carboxypiperidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.75 (2H, d, J=8.8Hz), 7.21 (2H, d, J=8.8Hz), 7.08 (2H, d, J=8.8Hz), 6.55 (2H, d, J=8.8Hz), 4.8-4.7 (1H, m), 3.8-3.7 (1H, m), 3.58 (1H, t, J=7.5Hz), 3.4-3.1 (5H, m), 2.3-1.2 (12H, m), 0.97 (3H, t, J=7.4Hz);

TLC : Rf 0.48 (acetic acid:methanol:chloroform=1:2:50).

4-(3RS-carboxypiperidin-1-ylsulfonyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (CDCl₃): δ 7.75 (2H, d, J=8.4Hz), 7.7-7.3 (4H, m), 7.19 (2H, d, J=8.4Hz). 4.0-3.4 (8H, m), 2.7-2.5 (2H, m), 2.5-2.1 (5H, m), 2.1-1.3 (5H, m), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.32 (acetic acid:methanol:chloroform=1:2:100),

4-(4S-carboxyperhydrothiazol-3-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃+CD₃OD): δ 7.69 (1H, s), 7.66 (1H, d, J=8.0Hz), 7.21 (2H, d, J=8.6Hz), 7.07 (1H, d, J=8.0Hz), 6.55 (2H, d, J=8.6Hz), 4.71 (1H, dd, J=7.2, 3.2Hz), 4.63 (1H, d, J=9.8Hz), 4.45 (1H, d, J=9.8Hz), 3.61 (1H, t, J=7.7Hz), 3.4-3.2 (5H, m), 2.84 (1H, dd, J=11.2, 7.2Hz), 2.3-2.1 (1H, m), 2.1-1.8 (4H, br), 2.02 (3H, s), 0.98 (3H, d, J=7.3Hz);

TLC : Rf 0.55 (chloroform:methanol:acetic acid=25:5:1).

4-(2RS-carboxymorpholin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CD₃OD): δ 7.65-7.54 (2H, m), 7.20 (2H, d, J=8Hz), 7.15 (1H, d, J=8Hz), 6.58 (2H, d, J=8Hz), 4.03-3.80 (3H, m), 3.71-3.38 (3H, m), 3.37-3.15 (4H, m), 2.50-1.78 (11H, m), 0.97 (3H, t, J=7Hz);

TLC : Rf 0.25 (methanol:chloroform=3:17).

4-(N-1S-carboxy-2-methylpropylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 8.05 (1H, d, J=9Hz), 7.78 (2H, d, J=8Hz), 7.25 (2H, d, J=8Hz), 7.17 (2H, d, J=8Hz), 6.86-6.70 (2H, m), 3.73 (1H, t, J=7Hz), 3.50 (1H. dd, J=9Hz, 6Hz), 3.38-3.20 (4H, m), 2.20-1.68 (7H, m), 0.88 (3H, t, J=7Hz), 0.80 (3H, d, J=7Hz), 0.76 (3H, d, J=7Hz);

TLC : Rf 0.34 (ethyl acetate).

4-(N-propyl-N-carboxymethylsulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.70-7.55 (2H, m), 7.23 (2H, d, J=8Hz), 7.01 (1H, d, J=8Hz), 6.55 (2H, d, J=8Hz), 4.20-3.80 (1H, br), 3.98 (2H, s), 3.60 (1H, t, J=7Hz), 3.35-3.07 (6H, m), 2.28-1.75 (9H, m), 1.60-1.38 (2H, m), 0.98 (3H, t, J=7Hz), 0.90 (3H, t, J=7Hz);

TLC : Rf 0.23 (chloroform:methanol=19:1).

4-(N,N-bis(2-hydroxyethyl)sulfamoyl)-2-methyl 2RS-(4-pyrrolidinyl-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.78-7.50 (6H, m), 7.15 (1H, d, J=8Hz), 3.96 (1H, t, J=7Hz), 3.95-3.80 (8H, m), 3.35-3.18 (4H, m), 2.40-2.15 (5H, m), 2.10-1.80 (1H, m), 2.02 (3H, s), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.23 (hexane:ethyl acetate=1:1).

4-(N-(3RS-carboxy-1,4-benzodioxan-5-yl)sulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 9.67 (1H, s), 7.80 (2H, d, J=9Hz), 7.20 (2H, d, J=9Hz), 7.13 (2H, d, J=9Hz), 6.84-6.57 (5H, m), 4.78 (1H, t, J=3Hz), 4.28 (1H, dd, J=11Hz, 3Hz), 4.13-4.00 (1H, m), 3.68 (1H, t, J=7Hz), 3.35-3.18 (4H, m), 2.15-1.88 (5H, m), 1.88-1.60 (1H, m), 0.88 (3H, t, J=7Hz);

TLC : Rf 0.18 (chloroform:methanol:acetic acid=40:2:1).

4-(N-2RS-hydroxy-4R-hydroxy-5R-hydroxy-6R-hydroxymethylperhydropyran-3R-ylsulfamoyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (DMSO-d₆+3 drop of CD₃OD): δ 7.80-7.60 (2H, m), 7.20 (2H, d, J=8.5Hz), 7.05 (1H, d, J=8.5Hz), 6.60 (2H, d, J=8.5Hz), 4.78 (1H, d, J=3.5Hz), 3.70 (1H, t, J=7.5Hz), 3.65-3.35 (4H, m), 3.30-3.15 (4H, m), 3.03 (1H, t, J=9.0Hz), 2.90 (1H, dd, J=10.5, 3.5Hz), 2.20-1.60 (2H, m), 2.00-1.90 (4H, m), 1.94 (3H, s), 0.91 (3H, t, J=7.5Hz);

TLC : Rf 0.55 (chloroform:methanol:water=40:10:1).

4-(N-3-carboxyadamantan-1-ylsulfamoyl)phenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.85 (2H, d, J=8.8Hz), 7.22 (2H, d, J=8.8Hz), 7.12 (2H, d, J=8.8Hz), 6.54 (2H, d, J=8.8Hz), 4.60 (1H, s), 3.59 (1H, t, J=7.4Hz), 3.40-3.15 (4H, m), 2.30-1.40 (20H, m), 0.98 (3H, t, J=7.6Hz);

TLC : Rf 0.60 (chloroform:methanol:acetic acid=40:2:1).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 2RS-(1,3-benzodioxol-5-yl)butanoic acid ester

NMR (DMSO-d₆): δ 12.73 (1H, br), 11.62 (1H, br), 9.22 (1H, t, J=6Hz), 7.82-7.71 (3H, m), 7.53-7.42 (2H, m), 7.26-7.10 (3H, m), 6.94-6.79 (3H, m), 6.01 (2H, s), 3.89 (2H, d, J=5Hz), 3.75 (1H, t, J=8Hz), 2.16-1.95 and 1.86-1.64 (each 1H, m), 0.86 (3H, t, J=7Hz);

TLC : Rf 0.68 (acetic acid:methanol:chloroform=1:3:30).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 2RS-(3,4-dimethoxyphenyl)butanoic acid ester

NMR (CDCl₃+CD₃OD): δ 7.45-7.41 (2H, m), 7.30-7.19 (2H, m), 7.18-7.01 (1H, m), 6.82-6.69 (3H, m), 6.56-6.52 (3H, m), 3.63 (2H, s), 3.53 (6H, s), 3.28 (1H, t, J=7Hz), 1.98-1.42 (2H, m), 0.63 (3H, t, J=7Hz);

TLC : Rf 0.64 (acetic acid:methanol:chloroform=1:3:30).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 2RS-(4-methylphenyl)butanoic acid ester

NMR(DMSO-d₆): δ 10.61-10.32 (1H, m), 7.85-7.74 (3H, m), 7.36-7.04 (8H, m), 6.90-6.75 (1H, m), 3.92-3.83 (2H, m), 3.77 (1H, t, J=7.6Hz), 2.29 (3H, s), 2.21-1.96 and 1.89-1.63 (each 1H, m), 0.87 (3H, t, J=7.4Hz);

TLC : Rf 0.23 (chloroform:methanol:water=8:2:0.2).

NMR (CDCl₃ + CD₃OD): δ 8.24 (2H, d, J=8Hz), 7.85-7.55 (6H, m), 7.10 (4H, m), 3.95 (2H, s), 3.87 (1H, t, J=7Hz), 2.25 and 1.98 (each 1H, m), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.33 (acetic acid:methanol:chloroform=1:3:30).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 2-(4-nitrophenyl)-2-methylpropanoic acid ester

NMR (DMSO-d₆): δ 13.50-11.00 (2H, br), 9.30-9.16 (1H, m), 8.23 (2H, d, J=8Hz), 7.88-7.68 (5H, m), 7.55-7.40 (2H, m), 7.25 (2H, d, J=8Hz),7.20-7.09 (1H, m), 3.89 (2H, d, J=6Hz), 1.68 (6H, s);

TLC : Rf 0.41 (acetic acid:methanol:chloroform=1:3:30).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 1-(4-nitrophenyl)cyclopropanecarboxylic acid ester

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 1-(4-nitrophenyl)cyclobutanecarboxylic acid ester

NMR (DMSO-d₆): δ 9.2-9.1 (1H, brt), 8.24 (2H, d, J=8Hz), 7.8-7.6 (5H, m), 7.5-7.4 (2H, m), 7.3-7.1 (3H, m), 3.88 (2H, d, J=5Hz), 3.0-2.8 (2H, br), 2.7-2.5 (2H, m), 2.2-1.8 (2H, m);

TLC : Rf 0.22 (acetic acid:methanol:chloroform=1:2:40).

4-(N-2-(N'-carboxymethylcarbamoyl)phenylsulfamoyl)phenyl 2RS-(4-(N,N-dimethylamino)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 11.62 (1H, s), 9.25 (1H, t, J=6Hz), 7.80 (2H, d, J=9Hz), 7.76 (1H, d, J=8Hz), 7.50-7.44 (5H, m), 7.27-7.14 (4H, m), 3.89 (2H, d, J=6Hz), 3.86 (1H, t, J=8Hz), 3.04 (6H, s), 2.17-2.03 and 1.91-1.71 (each 1H, m). 0.88 (3H, t, J=7Hz);

TLC : Rf 0.48 (acetic acid:methanol:chloroform=1:3:30).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.89-7.69 (2H, m), 7.54 and 7.41 (each 2H, d, J=8Hz), 7.15 (1H, d, J=8Hz), 4.28-4.16 (1H, m), 3.90 (1H, t, J=7Hz), 3.69-3.64 (4H, m), 3.51-3.40 and 3.31-3.21 (each 1H, m), 2.28-2.21 (5H, m), 2.02 (3H, s), 2.01-1.89 (4H, m), 1.80-1.65 (1H, m), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.17 (chloroform:methanol:water=9:1:0.1).

4-((2R-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.81-7.68 (2H, m), 7.56 and 7.45 (each 2H, d, J=8Hz), 7.15 (1H, d, J=8Hz), 4.28-4.16 (1H, m), 3.91 (1H, t, J=7Hz), 3.71-3.64 (4H, m), 3.50-3.40 and 3.33-3.22 (each 1H, m), 2.31-2.22 (5H, m), 2.03 (3H, s), 2.02-1.84 (4H, m), 1.80-1.64 (1H, m), 1.00 (3H, t, J=7Hz);

TLC : Rf 0.18 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.80-7.68 (2H, m), 7.50 and 7.31 (each 2H, d, J=8Hz), 7.14 (1H, d, J=8Hz), 4.22-4.16 (1H, m), 3.87 (1H, t, J=7Hz), 3.68-3.56 (4H, m), 3.50-3.42 and 3.35-3.20 (each 1H, m), 2.32-2.18 (5H, m), 2.02 (3H, s), 2.01-1.83 (4H, m), 1.79-1.65 (1H, m), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.17 (chloroform:methanol:water=9:1 :0.1).

4-((2R-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CD₃OD): δ 7.77-7.68 (2H, m), 7.57 and 7.48 (each 2H, d, J=8Hz), 7.15 (1H, d, J=8Hz), 4.22-4.17 (1H, m), 3.93 (1H, t, J=7Hz), 3.74-3.66 (4H, m), 3.52-3.42 and 3.35-3.21 (each 1H, m), 2.28-2.22 (5H, m), 2.02 (3H, s), 2.01-1.87 (4H, m), 1.80-1.64 (1H, m), 0.99 (3H, t, J=7Hz);

TLC : Rf 0.18 (chloroform:methanol:water=9:1:0.1).

4-((2S-aminomethylpyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.85-7.70 (2H, m), 7.64 (4H, s), 7.22 (1H, d, J=8.0Hz). 3.98 (1H, t, J=8.0Hz), 4.00-3.80 (1H, m), 3.85-3.70 (4H, m), 3.55-3.20 (2H, m), 3.15-2.95 (2H, m), 2.40-1.80 (2H, m), 2.35-2.25 (4H, m), 2.06 (3H, s), 2.00-1.40 (4H, m), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.29 (chloroform:methanol:water=4:1:0.1).

4-((4-aminopiperidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (DMSO-d₆): δ 8.14 (2H, brs), 7.63 (1H, s), 7.60 (1H, d, J=8.4Hz), 7.21 (2H, d, J=8.4Hz), 7.20 (1H, d, J=8.4Hz), 6.64 (2H, d, J=8.4Hz), 3.8-3.5 (4H, br), 3.3-3.2 (5H, br), 3.2-3.0 (1H, br), 2.5-2.3 (2H, m), 2.2-2.0 (1H, m), 2.0-1.9 (4H, br), 1.98 (3H, s), 1.9-1.7 (1H, m), 1.7-1.5 (2H, m), 0.90 (3H, t, J=7.2Hz);

TLC : Rf 0.20 (chloroform:methanol=9:1).

4-((2S-carboxyazetidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CD₃OD): δ 7.72 (1H, s), 7.71 (1H, d, J=8.0Hz), 7.22 (2H, d, J=8.8Hz), 7.17 (1H, d, J=8.0Hz), 6.58 (2H, d, J=8.8Hz), 4.30 (1H, t, J=8.5Hz), 3.8-3.6 (3H, m), 3.4-3.2 (4H, m), 2.4-2.1 (3H, m), 2.1-2.0 (4H, brs), 2.0-1.8 (1H, m), 2.04 (3H, s), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.59 (chloroform:methanol:acetic acid=25:5:1).

4-((2RS-carboxypiperidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.65 (1H, s), 7.63 (1H, d, J=8.2Hz), 7.21 (2H, d, J=8.6Hz), 6.99 (1H, d, J=8.2Hz), 6.53 (2H, d, J=8.6Hz), 4.7-4.6 (1H, brs), 4.7-4.1 (1H, br), 3.59 (1H, t, J=7.7Hz), 3.5-3.2 (6H, brs), 2.3-2.1 (1H, m), 2.1-1.9 (4H, brs), 2.0-1.8 (1H, m), 1.98 (3H, s), 1.6-1.2 (6H, br), 0.96 (3H, t, J=7.4Hz);

TLC : Rf 0.12 (chloroform:methanol=9: 1).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(3-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.70-7.64 (2H, m ), 7.20 (1H, t, J=7.8Hz), 7.09 (1H, d, J=7.8Hz), 6.66 (1H, d, J=7.8Hz), 6.53-6.47 (2H, m), 4.3-4.2 (1H, m), 3.8-3.4 (2H, m), 3.4-3.2 (5H, m), 2.3-1.7 (13H, m), 1.01 (3H, t, J=7.4Hz);

TLC : Rf 0.58 (chloroform:methanol:acetic acid=9:1:0.2).

4-((2S-carboxy-4R-methoxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 7.73 (1H, s), 7.66 (1H, d, J=8.6Hz), 7.26 (2H, d, J=8.8Hz), 7.15 (1H, d, J=8.6Hz), 6.78 (2H, d, J=8.8Hz), 5.00 (1H, brs), 4.02 (1H, t, J=7Hz), 3.82 (1H, m), 3.76 (1H, t, J=7Hz), 3.41 (2H, m), 3.31 (4H, m), 2.83 (3H, s), 2.15 (2H, m), 2.00 (4H, m), 1.98 (3H, s), 1.95 (2H, m), 0.92 (3H, t, J=7.4Hz);

TLC : Rf 0.34 (chloroform:methanol:water=4:1:0.1).

4-((2R-carboxy-4R-methoxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • hydrochloride

NMR (DMSO-d₆): δ 7.77 (1H, d, J=2.4Hz), 7.70 (1H, dd, J=8.4Hz, 2.4Hz), 7.26 (2H, d, J=8.2Hz), 7.16 (1H, d, J=8.4Hz), 6.75 (2H, d, J=8.2Hz), 4.80 (1H, brs), 4.31 (1H, dd, J=9.2Hz, 3.2Hz), 3.76 (2H, m), 3.33 (6H, m), 3.12 (3H, s), 2.12 (2H, m), 2.02 (4H, m), 1.98 (3H, s), 1.80 (2H, m), 0.91 (3H, t, J=7.2Hz);

TLC : Rf 0.47 (chloroform:methanol:water=4:1:0.1).

4-(N-methoxy-N-carboxymethylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.66 (1H, s), 7.63 (1H, d, J=8.0Hz), 7.22 (2H, d, J=8.8Hz), 7.08 (1H, d, J=8.0Hz), 6.54 (2H, d, J=8.8Hz), 5.3-4.6 (1H, br), 3.81 (3H, s), 3.70 (2H, s), 3.69 (1H, t, J=7.8Hz), 3.3-3.2 (4H, brs), 2.2-2.0 (1H, m), 2.1-1.9 (4H, brs), 2.01 (3H, s), 2.0-1.8 (1H, m), 0.97 (3H, t, J=7.4Hz);

TLC : Rf 0.44 (hexane:ethyl acetate=2:1).

4-((2S-carboxyaziridin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃+CD₃OD): δ 7.74 (1H, s), 7.70 (1H, d, J=8.4Hz), 7.20 (2H, d, J=8.4Hz), 7.08 (1H, d, J=8.4Hz), 6.54 (2H, d, J=8.4Hz), 3.61 (1H, t, J=7.5Hz), 3.3-3.2 (4H, brs), 2.6-2.3(3H, brs), 2.3-2.1 (1H, m), 2.1-1.9 (4H, brs), 2.0-1.8 (1H, m), 1.99(3H, s), 0.97 (3H, t, J=7.4Hz);

TLC : Rf 0.28 (chloroform:methanol=4:1).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-ethylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.8-7.6 (m, 2H), 7.36 (d, J=8.4Hz, 2H), 7.07 (d, J=8.4Hz, 1H), 7.02 (d, J=8.4Hz, 2H), 4.3-4.2 (m, 1H), 3.70 (t, J=7.2Hz, 1H), 3.6-3.4 (m, 5H), 3.3-3.1 (m, 1H), 2.37 (q, J=7.6Hz, 2H), 2.3-1.6 (m, 10H), 1.03 (t, J=7.6Hz, 3H), 0.99 (t, J=7.6Hz, 3H);

TLC : Rf 0.33 (chloroform:methanol:acetic acid=50:2:1).

4-(N-(1,1-dimethyl-1-carboxymethyl)aminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (DMSO-d₆): δ 7.68 (1H, s-like), 7.64 (1H, dd, J=2 and 8Hz), 7.39 (1H, br), 7.18 (2H, d, J=8Hz), 7.07 (1H, d, J=8Hz), 6.53 (2H, d, J=8Hz), 3.69 (1H, t, J=7Hz), 3.24-3.18 (4H, m), 2.20-1.65 (2H, m), 1.98-1.91 (4H, m), 1.93 (3H, s), 1.18 (6H, s), 0.90 (3H, t, J=7Hz);

TLC : Rf 0.19 (chloroform:methanol:water=9:1:0.1).

4-(N-methyl-N-hydroxyaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.71 (1H, s), 7.69 (1H, d, J=8.6Hz), 7.23 (2H, d, J=8.8Hz), 7.13 (1H, d, J=8.6Hz), 6.55 (2H, d, J=8.8Hz), 6.54 (1H, s), 3.63 (1H, t, J=7.7Hz), 3.3-3.2 (4H, brs), 2.81 (3H, s), 2.3-2.1 (1H, m), 2.1-1.9 (4H, brs), 2.06 (3H, s), 2.0-1.8 (1H, m), 0.99 (3H, t, J=7.3Hz);

TLC : Rf 0.43 (hexane:ethyl acetate=2:1).

4-(N-carboxymethylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 7.70-7.58 (2H, m), 7.25 (2H, d, J=8Hz), 7.01 (1H, d, J=8Hz), 6.65 (2H, d, J=8Hz), 5.43-5.23 (1H, br), 5.18-4.80 (1H, br), 3.75 (2H, brs), 3.63 (1H, t, J=7Hz), 3.40-3.20 (4H, m), 2.28-1.80 (9H, m), 0.98 (3H, t, J=7Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(N-(1,1-dimethyl-1-carboxymethyl)-N-propylaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (DMSO-d₆ + 2 drops of D20): δ 7.80 (1H, s-like), 7.78 (1H, dd, J=2 and 8Hz), 7.18 (2H, d, J=8Hz), 7.11 (1H, d, J=8Hz), 6.54 (2H, d, J=8Hz), 3.70 (1H, t, J=7Hz), 3.25-3.17 (4H, m), 3.12-3.04 (2H, m), 2.20-1.70 (2H, m), 1.99-1.92 (4H, m), 1.95 (3H, s), 1.57-1.42 (2H, m), 1.45 (6H, s), 0.91 (3H, t, J=7Hz), 0.71 (3H, t, J=7Hz);

TLC : Rf 0.57 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxy-4S-aminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.83-7.68 (2H, m), 7.63 (4H, s-like), 7.22 (1H, d, J=8.2Hz), 4.21 (1H, dd, J=9.2 and 3.4Hz), 3.98 (1H, t, J=7.8Hz), 3.90-3.43 (7H, m), 2.70-1.84 (8H, m), 2.06 (3H, s), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.46 (ethyl acetate:acetic acid:water=6:2:1).

4-((2S-carboxy-4R-aminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.84-7.68 (2H, m), 7.63 (4H, s-like), 7.18 (1H, d, J=8.0Hz), 4.55 (1H, dd, J=8.4 and 4.2Hz), 4.07-3.90 (2H, m), 3.90-3.63 (5H, m), 3.47-3.26 (1H, m), 2.53-1.82 (8H, m), 2.05 (3H, s), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.42 (ethyl acetate:acetic acid:water=6:2:1).

4-(N-carboxymethyl-N-(2-(morpholin-4-yl)ethyl)aminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (CDCl₃): δ 7.66-7.52 (2H, m), 7.21 (2H, d, J=8.5Hz), 7.09 (1H, d, J=8.5Hz), 6.55 (2H, d, J=8.5Hz), 3.95-3.80 (4H, m), 3.75 (2H, s), 3.61 (1H, t, J=7.5Hz), 3.45-3.20 (6H, m), 3.10-2.70 (6H, m), 2.30-1.75 (6H, m), 2.04 (3H, s), 0.99 (3H, t, J=7.5Hz);

TLC : Rf 0.24 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxy-4S-acetylaminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (DMSO-d₆): δ 8.02 (1H, d, J=7.8Hz), 7.74 (1H, d, J=2.2Hz), 6.69 (1H, dd, J=8.4Hz, 2.2Hz), 7.17 (2H, d, J=8.6Hz), 7.17 (1H, d, J=8.4Hz), 6.54 (2H, d, J=8.6Hz), 4.13 (1H, t, J=7.8Hz), 3.82 (1H, m), 3.70 (1H, t, J=7.6Hz), 3.50 (1H, m), 3.22 (4H, m), 3.06 (1H, m), 2.31 (1H, m), 2.07 (1H, m), 1.99 (3H, s), 1.96 (4H, m), 1.82 (2H, m), 1.75 (3H, s), 0.91 (3H, t, J=7.4Hz);

TLC : Rf 0.18 (chloroform:methanol:water=4:1:0.1).

4-((2S-carboxy-4R-acetylaminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester hydrochloride

NMR (DMSO-d₆): δ 7.78 (1H, d, J=5Hz), 7.68 (1H, s), 7.64 (1H, d, J=8.0Hz), 7.19 (2H, d, J=8.6Hz), 7.16 (1H, d, J=8.0Hz), 6.56 (2H, d, J=8.6Hz), 4.28 (1H, t, J=7.8Hz), 4.12 (1H, m), 3.75 (1H, m), 3.48 (1H, m), 3.23 (4H, m), 3.06 (1H, m), 2.12 (1H, m), 2.03 (2H, m), 1.99 (3H, s), 1.96 (4H, m), 1.80 (1H, m), 1.54 (3H, s), 0.91 (3H, t, J=7.2Hz);

TLC : Rf 0.19 (chloroform:methanol:water=4:1:0.1).

4-((2RS-carboxy-5-nitroindolin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

NMR (CDCl₃): δ 8.33 (1H, d, J=2Hz), 7.89 (1H, dd, J=8, 2Hz), 7.67 (1H, s), 7.62 (1H, d, J=8Hz), 7.20 (1H, d, J=8Hz), 7.18 (2H, d, J=8Hz), 7.02 (1H, d, J=8Hz), 6.55 (2H, d, J=8Hz), 4.85 (1H, dd, J=10, 5Hz), 4.60-4.25 (1H, br), 3.59 (1H, t, J=7Hz), 3.40-3.15 (6H, m), 2.25-1.75 (9H, m), 0.95 (3H, t, J=7Hz);

TLC : Rf 0.30 (chloroform:methanol:acetic acid=4:2:0.1).

4-((2S-carboxy-4S-methylaminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2hydrochloride

NMR (CD₃OD): δ 7.77 (1H, s), 7.75 (1H, d, J=8.0Hz), 7.37 (2H, d, J=8.6Hz), 7.19 (1H, d, J=8.0Hz), 6.98 (2H, d, J=8.6Hz), 4.18 (1H, m), 3.69 (3H, m), 3.59 (1H, m), 3.46 (4H, m), 2.72 (3H, s), 2.57 (1H, m), 2.21 (2H, m), 2.13 (4H, m), 2.02 (3H, s), 1.93 (1H, m), 0.98 (3H, t, J=7.4Hz);

TLC : Rf 0.28 (chloroform:methanol:water=4:1:0.1).

4-((2S-carboxy-4S-(N,N-dimethylamino)pyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2hydrochloride

NMR (CD₃OD): δ 7.81 (1H, s), 7.78 (1H, d, J=8.2Hz), 7.62 (4H, s), 7.21 (1H, d, J=8.2Hz), 4.25 (1H, t, J=7Hz), 3.98 (1H, t, J=7Hz), 3.77 (4H, m), 3.65 (3H, m), 2.90 (6H, s), 2.80 (1H, m), 2.29 (4H, m), 2.24 (2H, m), 2.06 (3H, s), 1.99 (1H, m), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.42 (chloroform:methanol:water=6:4:1).

4-(N-hydroxyaminosulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (CDCl₃): δ 7.73 (1H, s), 7.68 (1H, d, J=8.6Hz), 7.23 (2H, d, J=8.0Hz), 7.2-7.0 (2H, br), 7.04 (1H, d, J=8.6Hz), 6.63 (2H, d, J=8.0Hz), 3.63 (1H, t, J=7.7Hz), 3.4-3.2 (4H, brs), 2.3-2.1 (1H, m), 2.1-1.9 (4H, brs), 2.00 (3H, s), 2.0-1.8 (1H, m), 0.97 (3H, t, J=7.3Hz);

TLC : Rf 0.25 (hexane:ethyl acetate=2:1).

4-((2S,6S-dimethylpiperazin-4-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2methanesulfonic acid salt

NMR (CDCl₃): δ 7.76-7.62 (6H, m), 7.23 (1H, d, J=8.5Hz), 4.01 (1H, t, J=7.5Hz), 4.00-3.75 (6H, m), 3.55-3.30 (2H, m), 2.68 (6H, s), 2.45-1.80 (8H, m), 2.07 (3H, s), 1.31 (6H, d, J=6.5Hz), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.66 (chloroform:methanol:water=4:1:0.1).

4-((2RS-methylpiperazin-4-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2methanesulfonic acid salt

NMR (CDCl₃): δ 7.76-7.60 (6H, m), 7.23 (1H, d, J=8.0Hz), 4.01 (1H, t, J=7.5Hz), 3.90-3.72 (6H, m), 3.55-3.35 (2H, m), 3.32-3.13 (1H, m), 2.82-2.62 (1H, m), 2.67 (6H, s), 2.49 (1H, dd, J=13.0, 10.0Hz), 2.40-1.80 (6H, m), 2.07 (3H, s), 1.32 (3H, d, J=6.5Hz), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.45 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxy-4R-(N,N-dimethylamino)pyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2hydrochloride

NMR (DMSO-d₆): δ 11.38 (1H, m), 7.77 (1H, s), 7.72 (1H, d, J=8.2Hz), 7.19 (3H, m), 6.63 (2H, d, J=8.6Hz), 4.38 (1H, m), 4.01 (1H, m), 3.82 (1H, m), 3.73 (1H, t, J=7.4Hz), 3.49 (1H, t, J=8.6Hz), 3.24 (4H, m), 2.70 (6H, s), 2.36 (2H, m), 2.11 (1H, m), 1.99 (3H, s), 1.97 (4H, m), 1.83 (1H, m), 0.91 (3H, t, J=7.2Hz);

TLC : Rf 0.44 (chloroform:methanol:water=6:4:1).

4-((2S-carboxy-4R-methylaminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2hydrochloride

NMR (CD₃OD): δ 7.76 (1H, s), 7.73 (1H, d, J=8.0Hz), 7.25 (2H, d, J=8.4Hz), 7.13 (1H, d, J=8.0Hz), 6.71 (2H, d, J=8.4Hz), 4.53 (1H, m), 3.97 (1H, m), 3.86 (1H, m), 3.70 (1H, t, J=8Hz), 3.41 (1H, m), 3.35 (4H, m), 2.70 (3H, s), 2.49 (1H, m), 2.31 (1H, m), 2.17 (1H, m), 2.06 (4H, m), 2.00 (3H, s), 1.92 (1H, m), 0.98 (3H, t, J=7.2Hz);

TLC : Rf 0.46 (chloroform:methanol:water=6:4:1).

4-(piperazin-4-ylsulfonyl)-2-ethylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.75-7.50 (6H, m), 7.25 (1H, d, J=9.0Hz), 3.97 (1H, t, J=7.5Hz), 3.85-3.70 (4H, m), 3.35-3.15 (8H, m), 2.50-1.80 (8H, m), 1.00 (6H, t, J=7.5Hz);

TLC : Rf 0.46 (chloroform:methanol:water=9:1:0.1).

4-(piperazin-4-ylsulfonyl)-2-ethylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ7.75-7.58 (6H, m), 7.25 (1H, d, J=9.0Hz), 3.98 (1H, t, J=7.5Hz), 3.90-3.70 (4H, m), 3.40-3.20 (8H, m), 2.50-1.80 (8H, m), 1.00 (6H, t, J=7.5Hz);

TLC : Rf 0.46 (chloroform:methanol:water=9:1:0.1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.71 (6H, m), 7.22 (1H, d, J=8.0Hz), 4.00 (1H, t, J=8Hz), 3.81 (4H, m), 3.31 (8H, s), 2.33 (4H, m), 2.24 (1H, m), 2.07 (3H, s), 1.98 (1H, m), 1.01 (3H, t, J=7.4Hz);

TLC : Rf 0.66 (chloroform:methanol:water=4:1:0.1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2R-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2hydrochloride

NMR (CD₃OD): δ 7.70 (6H, m), 7.22 (1H, d, J=8.0Hz), 4.00 (1H, t, J=8Hz), 3.81 (4H, m), 3.30 (8H, s), 2.32 (4H, m), 2.24 (1H, m), 2.06 (3H, s), 1.99 (1H, m), 1.00 (3H, t, J=7.4Hz);

TLC : Rf 0.66 (chloroform:methanol:water=4:1:0.1).

4-((2S-carboxy-4-acetylaminopyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · hydrochloride

NMR (DMSO-d₆): δ 8.02 (1H, d, J=6Hz), 7.74 (1H, s), 7.69 (1H, d, J=8.8Hz), 7.24 (2H, d, J=8.6Hz), 7.18 (1H, d, J=8.6Hz), 6.69 (1H, d, J=8.8Hz), 4.15 (1H, t, J=7Hz), 3.75 (2H, m), 3.51 (1H, m), 3.28 (4H, m), 3.05 (1H, m), 2.33 (1H, m), 2.12 (1H, m), 1.99 (7H, s-like), 1.83 (2H, m), 1.75 (3H, s), 0.91 (3H, t, J=7.4Hz);

TLC : Rf 0.67 (chloroform:methanol:water=6:4:1).

4-((2-carboxy-5,6-dimethoxyindol-1-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • hydrochloride

NMR (DMSO-d₆): δ 7.87 (1H, d, J=2.2Hz), 7.79 (1H, dd, J=8.6Hz, 2.2Hz), 7.50 (1H, s), 7.25-7.13 (5H, m), 6.66 (2H, d, J=8.0Hz), 3.88 (3H, s), 3.78 (3H, s), 3.71 (1H, t, J=7.2Hz), 3.26 (4H, m), 2.08 (1H, m), 1.97 (4H, m), 1.93 (3H, s), 1.78 (1H, m), 0.88 (3H, t, J=7.6Hz);

TLC : Rf 0.45 (chloroform:methanol:water=4:1:0.1).

4-((2RS-carboxyindolin-1-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • hydrochloride

NMR (DMSO-d₆): δ 7.78 (1H, s), 7.67 (1H, dd, J=2 and 8Hz), 7.35-6.94 (7H, m), 6.80-6.64 (2H, br), 5.00-4.93 (1H, m), 3.70 (1H, t, J=7Hz), 3.39-2.96 (6H, m), 2.17-1.64 (2H, m), 2.04-1.94 (4H, m), 1.91 (3H, s), 0.87 (3H, t, J=7Hz);

TLC : Rf 0.30 (chloroform:methanol:water=4:1:0.1).

4-((2RS-methylpiperazin-4-yl)sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester · 2methanesulfonic acid salt

NMR (CD₃OD): δ 7.75-7.60 (6H, m), 7.23 (1H, d, J=8.5Hz), 4.00 (1H, t, J=7.5Hz), 3.90-3.70 (6H, m), 3.55-3.35 (2H, m), 3.35-3.10 (1H, m), 2.80-2.65 (1H, m), 2.66 (6H, s), 2.47 (1H, t, J=10.0Hz), 2.06 (3H, s), 1.31 (3H, d, J=6.5Hz), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.45 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • sodium salt

NMR (d₆-DMSO): δ 7.78-7.64 (2H, m), 7.18 (2H, d, J=8.0Hz), 7.08 (1H, d, J=8.0Hz), 6.53 (2H, d, J=8.0Hz), 3.95-3.80 (1H, m), 3.69 (1H, t, J=7.5Hz), 3.50-3.00 (6H, m), 2.20-1.30 (10H, m), 1.96 (3H, s), 0.91 (3H, t, J=7.5Hz) ;

TLC : Rf 0.32 (chloroform:methanol:water=9:1:0.1).

4-((2S-carboxypyrrolidin-1-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • methanesulfonic acid salt

NMR (CDCl₃): δ 7.65 (4H, d, J=8.5Hz), 7.54 (2H, d, J=8.5Hz), 7.05 (1H, d, J=8.5Hz), 4.30-4.15 (1H, m), 4.10-3.50 (4H, m), 3.80 (1H, t, J=7.5Hz), 3.55-3.35 (1H, m), 3.30-3.10 (1H, m), 2.87 (3H, s), 2.50-1.60 (10H, m), 2.03 (3H, s), 0.99 (3H, t, J=7.5Hz);

TLC : Rf 0.32 (chloroform:methanol:water=9:1:0.1).

4-((piperazin-4-yl)sulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester • 2methanesulfonic acid salt

NMR (CD₃OD): δ 7.75-7.60 (6H, m), 7.23 (1H, d, J=8.0Hz), 4.01 (1H, t, J=7.5Hz), 3.90-3.70 (4H, m), 3.35-3.20 (8H, m), 2.68 (6H, s), 2.40-1.80 (6H, m), 2.06 (3H, s), 1.00 (3H, t, J=7.5Hz);

TLC : Rf 0.14 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl) butanoic acid ester • citric acid salt • ethanol salt

NMR (CD₃OD): δ 7.66 (1H, brs), 7.62 (1H, brd, J=8.0Hz), 7.20 (2H, d, J=8.5Hz), 7.18 (1H, d, J=8.0Hz), 6.58 (2H, d, J=8.5Hz), 3.67 (1H, t, J=7.5Hz), 3.60 (2H, q, J=7.0Hz), 3.40-3.15 (12H, m), 2.76 (4H, dd, J=8.0, 14.0Hz), 2.30-1.70 (9H, m), 1.17 (3H, t, J=7.0Hz), 0.97 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • succinic acid salt

NMR (CD₃OD): δ 7.64 (1H, brs), 7.61 (1H, brd, J=8.0Hz), 7.19 (2H, d, J=8.5Hz), 7.17 (1H, d, J=8.0Hz), 6.57 (2H, d, J=8.5Hz), 3.64 (1H, t, J=7.5Hz), 3.40-3.20 (4H, m), 3.12 (8H, s), 2.51 (4H, s), 2.30-1.76 (9H, m), 0.97 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • L-malic acid salt

NMR (CD₃OD): δ 7.67 (1H, brs), 7.62 (1H, brd, J=8.0Hz), 7.22 (2H, d, J=8.5Hz), 7.19 (1H, d, J=8.0Hz), 6.58 (2H, d, J=8.5Hz), 4.28 (1H, dd, J=5.0, 7.5Hz), 3.68 (1H, t, J=7.5Hz), 3.40-3.05 (12H, m), 2.78 (1H, dd, J=5.0, 15.0Hz), 2.52 (1H, dd, J=7.5, 15.0Hz), 2.40-1.72 (9H, m), 0.98 (3H, t, J=7.5Hz) ;

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • fumaric acid salt

NMR (CD₃OD): δ 7.68 (1H, brs), 7.63 (1H, brd, J=8.0Hz), 7.21 (2H, d, J=8.5Hz), 7.19 (1H, d, J=8.0Hz), 6.82 (2H, s), 6.59 (2H, d, J=8.5Hz), 3.65 (1H, t, J=7.5Hz), 3.40-3.10 (12H, m), 2.30-1.70 (9H, m), 0.98 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • oxalic acid salt

NMR (CD₃OD): δ 7.68 (1H, s), 7.63 (1H, brd, J=8.0Hz), 7.20 (2H, d, J=8.5Hz), 7.19 (1H, d, J=8.0Hz), 6.60 (2H, d, J=8.5Hz), 3.66 (1H, t, J=7.5Hz), 3.45-3.10 (12H, m), 2.30-1.75 (9H, m), 0.98 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • L-lactic acid salt

NMR (CD₃OD): δ 7.65 (1H, s), 7.61 (1H, brd, J=8.0Hz), 7.20 (2H, d, J=8.5Hz), 7.17 (1H, d, J=8.0Hz), 6.57 (2H, d, J=8.5Hz), 4.04 (1H, q, J=7.0Hz), 3.65 (1H, t, J=7.5Hz), 3.40-3.20 (4H, m), 3.14 (8H, s), 2.15 (3H, s), 2.20-1.75 (6H, m), 1.31 (3H, d, J=7.0Hz), 0.97 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • L-tartaric acid salt

NMR (CD₃OD): δ 7.68 (1H, s), 7.64 (1H, brd, J=8.0Hz), 7.21 (2H, d, J=8.5Hz), 7.18 (1H, d, J=8.0Hz), 6.59 (2H, d, J=8.5Hz), 4.43 (2H, s), 3.68 (1H, t, J=7.5Hz), 3.45 - 3.10 (12H, m), 2.40 - 1.78 (9H, m), 0.98 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • 2 p-toluenesulfonic acid salt

NMR (CD₃OD): δ 7.68 (6H, d, J=8.0Hz), 7.63 (4H, d, J=9.0Hz), 7.22 (5H, d, J=8.0Hz), 3.99 (1H, t, J=7.4Hz), 3.83 - 3.65 (4H, m), 3.30 (8H, m), 2.36 (6H, s), 2.36-2.20 (5H, m), 2.04 (3H, s), 1.95 (1H, m), 0.99 (3H, t, J=7.4Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • phosphoric acid salt

NMR (DMSO-d₆): δ 8.00-7.40 (3H, m), 7.67 (1H, brs), 7.62 (1H, brd, J=8.8Hz), 7.25 (1H, d, J=8.8Hz), 7.21 (2H, d, J=8.8Hz), 6.56 (2H, d, J=8.8Hz), 3.75 (1H, t, J=7.4Hz), 3.23 (4H, brs), 2.94 (8H, brs), 2.01 (3H, s), 2.20-1.80 (6H, m), 0.93 (3H, t, J=7.4Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(piperazin-4-ylsulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl) phenyl)butanoic acid ester • maleic acid salt

NMR (CD₃OD): δ 7.67 (1H, s), 7.62 (1H, brd, J=8.0Hz), 7.20 (2H, d, J=8.5Hz), 7.19 (1H, d, J=8.0Hz), 6.58 (2H, d, J=8.5Hz), 6.23 (2H, s), 3.65 (1H, t, J=7.5Hz), 3.40-3.05 (12H, m), 2.30-1.78 (6H, m), 1.98 (3H, s), 0.97 (3H, t, J=7.5Hz);

TLC : Rf 0.11 (chloroform:methanol:acetic acid=40:2:1).

4-(2S-hydroxysulfonyloxymethylpyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-methylphenyl)butanoic acid ester

To a solution of the compound prepared in example 2(19) (690 mg) in pyridine (10 ml) was added sulfur trioxide pyridine complex (766 mg) and the reaction mixture was stirred for 30 min at room temperature. The reaction mixture was concentrated, and the residue was purified by column chromatography on silica gel (chloroform:methanol=10:1) to give the title compound (700 mg) having the following physical data.

NMR (DMSO-d₆): δ 7.74 (1H, d, J=2.0Hz), 7.67 (1H, dd, J=8.5, 2.0Hz), 7.30 (2H, d, J=8.5Hz), 7.20 (2H, d, J=8.5Hz), 7.18 (1H, d, J=8.5Hz), 3.94-3.78 (2H, m), 3.76-3.60 (1H, m), 3.58 (1H, t, J=7.0Hz), 3.3-3.2 (1H, m), 3.12-2.94 (1H, m), 2.31 (3H, s), 2.25-2.00 and 1.95-1.70 (each 1H, m), 1.97 (3H, s), 1.90-1.60 (2H, m), 1.60-1.30 (2H, m), 0.91 (3H, t, J=7.5Hz);

TLC : Rf 0.39 (water:methanol:chloroform=1:10:40).

4-(2S-hydroxysulfonyloxymethylpyrrolidin-1-ylsulfonyl)-2-methylphenyl 2RS-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester

By the same procedure as Preparation example 3, the title compound having the following physical data was given by using the compound prepared in Preparation example 2(10).

NMR (DMSO-d₆): δ 7.74 (1H, s), 7.67 (1H, d, J=8.5Hz), 7.25-7.10 (3H, m), 6.55 (2H, d, J=8.0Hz), 3.91 (1H, d, J=8.5Hz), 3.80-3.50 (3H, m), 3.40-3.20 (1H, m), 3.35-3.20 (4H, m), 3.15-2.90 (1H, m), 2.20-1.60 (2H, m),1.98 (3H, s), 2.05-1.90 (4H,m), 1.90-1.60 (2H,m), 1.60-1.30 (2H,m), 0.91 (3H,t,J=7.5Hz) ;

TLC:Rf 0.38 (water:methanol:chloroform=1:10:40).

The following components were admixed in conventional manner and punched out to obtain 100 tablets each containing 50 mg of active ingredient. 4-(piperazin-4-yl sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2 hydrochloride 5.0g Carboxymethylcellulose calcium (disintegrating agent) 0.2g Magnesium stearate (lubricating agent) 0.1g Microcrystalline cellulose 4.7g

The following components were admixed in conventional manner. The solution was sterilized in conventional manner, placed 5 ml portion into ampoules and freeze-dried to obtain 100 ampoules each containing 20 mg of the active ingredient. 4-(piperazin-4-yl sulfonyl)-2-methylphenyl 2S-(4-(pyrrolidin-1-yl)phenyl)butanoic acid ester 2 hydrochloride 2.0g mannitol 20 g Distilled water 1000ml