Indole compounds as an inhibitor of cellular necrosis

1. An indole compound of the following formula (1):

in which

n denotes a number of 0 to 3,

A represents 5 membered heteroaryl or heterocycle each of which has 1 to 3 hetero atoms selected from N, O and S,

R 1 represents R 5 —X—B—X′—,

B represents a direct bond, or represents 3˜10 membered heterocycle or heteroaryl each of which has 1 to 4 hetero atoms selected from N, O and S,

X and X′ independently of one another represent a direct bond, or are selected from the group consisting of —NR 6 —, —CO—, —CONR 6 —, —CO 2 —, —OC(O)—, —S(O) m —, —O—(CH 2 ) m —, —(CH 2 ) m —O—, —(CH 2 ) m —, —NR 6 CO—, —(R 6 O) 2 P(O)— and —NHCO 2 —, wherein m denotes a number of 0 to 3, and R 6 represents hydrogen or alkyl,

R 5 represents hydrogen, hydroxy, alkyl, alkoxy, cycloalkyl or 4˜10 membered aryl, or represents 3˜10 membered monocyclic or fused cyclic heterocycle or heteroaryl each of which has 1 to 3 hetero atoms selected from N, O and S, and is optionally substituted by oxo or alkyl, or

R 2 represents —(CR 8 R 9 ) p —Y—R 7 ,

p denotes a number of 0 to 2,

R 8 and R 9 independently of one another represent hydrogen or alkyl,

Y represents a direct bond, or is selected from the group consisting of —O—, —S—, —NR 6 —, —NR 6 C(O)—, C(O)NR 6 — and —S(O) q —, wherein q denotes a number of 0 to 2,

R 7 represents hydrogen, halogen, hydroxy, alkyl, 4˜10 membered aryl, or represents 3˜10 membered heterocycle or heteroaryl each of which has 1 to 3 hetero atoms selected from N, S and O and which optionally contains oxo,

R 3 represents hydrogen, alkyl, or —(CH 2 ) q -cycloalkyl,

R 4 represents cycloalkyl,

where alkyl, alkoxy, aryl, cycloalkyl, heterocycle and heteroaryl may be optionally substituted, and the substituents are one or more selected from the group consisting of hydroxy, halogen, nitrile, amino, alkylamino, dialkylamino, alkyl, haloalkyl, alkylsulfonyl, carboxyalkyl, alkylcarbonyloxy, alkylthio, alkyloxycarbonyl, alkylaminocarbonyl, arylalkoxy and oxo,

or pharmaceutically acceptable salt or stereoisomer thereof.

2. The compound according to claim 1 wherein

n denotes a number of 0 to 3,

A represents 5 membered heteroaryl or heterocycle each of which has 1 to 3 hetero atoms selected from N, O and S,

R 1 represents R 5 —X—B—X′—,

B represents a direct bond, or represents 3˜10 membered heterocycle or heteroaryl each of which has 1 to 4 hetero atoms selected from N, O and S,

X and X′ independently of one another represent a direct bond, or are selected from the group consisting of —NR 6 —, —CO—, —CONR 6 —, —CO 2 —, —OC(O)—, —S(O) 2 —, —O—(CH 2 ) m —, —(CH 2 ) m —O—, —(CH 2 ) m —, —NR 6 CO—, —(R 6 O) 2 P(O)— and —NHCO 2 —, wherein m denotes a number of 0 to 3, and R 6 represents hydrogen or C 1 -C 6 -alkyl,

R 5 represents hydrogen, hydroxy, C 1 -C 6 -alkyl, halogeno-C 1 -C 6 -alkyl, hydroxy-C 1 -C 6 -alkyl, C 4 -C 6 -cycloalkyl, phenyl or halophenyl, or represents 5˜10 membered monocyclic or fused cyclic heterocycle or heteroaryl each of which has 1 to 3 hetero atoms selected from N, O and S, and is optionally substituted by oxo or halogeno-C 1 -C 6 -alkyl, or

R 2 represents —(CR 8 R 9 ) p —Y—R 7 ,

p denotes a number of 0 to 2,

R 8 and R 9 independently of one another represent hydrogen or C 1 -C 6 -alkyl,

Y represents a direct bond, or is selected from the group consisting of —O—, —NR 6 —, —NR 6 C(O)—, —C(O)NR 6 —, and —S(O) q —, wherein q denotes a number of 0 to 2,

R 7 represents hydrogen, halogen, hydroxy, C 1 -C 6 -alkyl, hydroxy-C 1 -C 6 -alkyl or halogeno-C 1 -C 6 -alkyl, represents phenyl optionally substituted by C 1 -C 6 -alkylsulfonyl, or represents 5˜6 membered heterocycle or heteroaryl each of which has 1 to 3 hetero atoms selected from N and O,

R 3 represents hydrogen, C 1 -C 6 -alkyl or —(CH 2 )—C 3 -C 6 -cycloalkyl,

R 4 represents C 3 -C 6 -cycloalkyl optionally containing oxo,

or pharmaceutically acceptable salt or stereoisomer thereof.

3. The compound according to claim 2 wherein A represents a cycle represented by one of the following formulae (i) to (viii):

in which

n and R 1 are as defined in claim 2 , and

R represents hydrogen, or represents C 1 -C 4 -alkyl optionally substituted by amino,

or pharmaceutically acceptable salt or stereoisomer thereof.

4. The compound according to claim 3 wherein A is selected from the group consisting of 4,5-dihydro-thiazole, thiazole, oxazoline, oxadiazole and isoxadiazole,

or pharmaceutically acceptable salt or stereoisomer thereof.

5. The compound according to claim 2 wherein B represents a direct bond, represents imidazole or oxadiazole, or represents a 5˜6 membered heterocycle having 1 to 2 hetero atoms selected from N and O,

or pharmaceutically acceptable salt or stereoisomer thereof.

6. The compound according to claim 5 wherein B represents a structure represented by one of the following formulae (ix) to (xii):

in which R 5 is as defined in claim 2 ,

or pharmaceutically acceptable salt or stereoisomer thereof.

7. The compound according to claim 2 wherein X represents a direct bond, or is selected from the group consisting of —CO—, —CONR 6 —, —CO 2 —, —SO 2 —, —(CH 2 ) m —, and —O—(CH 2 ) m —, wherein m denotes a number of 0 to 2, and R 6 represents hydrogen, or C 1 -C 6 -alkyl,

or pharmaceutically acceptable salt or stereoisomer thereof.

8. The compound according to claim 7 wherein X is selected from the group consisting of —CO—, —CONH—, —CO 2 —, —SO 2 —, —(CH 2 ) 2 —, —O— and —O—CH 2 —,

or pharmaceutically acceptable salt or stereoisomer thereof.

9. The compound according to claim 2 wherein X′ represents a direct bond, or is selected from the group consisting of —(CH 2 ) 2 —, —NH—, —CO—, —CO 2 —, —CONH—, —S(O) 2 —, —(R 6 O) 2 P(O)—, —NHC(O)— and —NHCO 2 —, wherein R 6 is as defined in claim 2 ,

or pharmaceutically acceptable salt or stereoisomer thereof.

10. The compound according to claim 2 wherein R 5 represents hydrogen, hydroxy, C 1 -C 6 -alkyl, halogeno-C 1 -C 6 -alkyl, hydroxy-C 1 -C 6 -alkyl, C 4 -C 6 -cycloalkyl, phenyl or halophenyl, or represents monocyclic or fused cyclic 5˜9 membered heterocycle or 5˜6 membered heteroaryl each of which has 1 to 3 hetero atoms selected from N, O and S, and is optionally substituted by oxo or trifluoromethyl,

or pharmaceutically acceptable salt or stereoisomer thereof.

11. The compound according to claim 10 wherein R 5 is selected from the group consisting of hydrogen, hydroxy, methyl, ethyl, isopropyl, isobutyl, hydroxymethyl, trifluoromethyl, cyclobutyl, cyclopentyl, cyclohexyl, pyrrolidine, piperidine, 2-oxopiperazine, 2-oxopyrrolidine, tetrahydrofuran, tetrahydropyran, tetrahydrothiopyran, morpholine, furan, pyridine, 1,3-pyrazine, 1,1-dioxo-thiomorpholine, tetrazole, imidazole, pyrazole and 3-trifluoromethyl-5,6,7,8-tetrahydro-2H-[1,2,4]triazolo[4,3-a]pyrazin,

or pharmaceutically acceptable salt or stereoisomer thereof.

12. The compound according to claim 2 wherein R 8 and R 9 each represent hydrogen,

or pharmaceutically acceptable salt or stereoisomer thereof.

13. The compound according to claim 2 wherein Y is selected from the group consisting of —O—, —NR 6 —, —NR 6 C(O)—, —C(O)NR 6 —, and —S(O) 2 —, wherein R 6 is as defined in claim 2 ,

or pharmaceutically acceptable salt or stereoisomer thereof.

14. The compound according to claim 13 wherein Y is selected from group consisting of —O—, —NH—, —NHC(O)— and —SO 2 —,

or pharmaceutically acceptable salt or stereoisomer thereof.

15. The compound according to claim 2 wherein R 7 represents hydrogen, halogen, hydroxy, C 1 -C 6 -alkyl, hydroxymethyl or halogeno-C 1 -C 6 -alkyl, represents phenyl optionally substituted by C 1 -C 6 -alkylsulfonyl, or represents 5˜6 membered heterocycle or heteroaryl each of which has 1 to 2 hetero atoms selected from N and O,

or pharmaceutically acceptable salt or stereoisomer thereof.

16. The compound according to claim 15 wherein R 7 is selected from the group consisting of hydrogen, bromo, fluoro, chloro, methyl, ethyl, propyl, hydroxymethyl, trifluoromethyl, phenyl, 4-methylsulfonyl-phenyl, piperidine, pyrrolidine, furan, pyrrole, pyrazole and pyridine,

or pharmaceutically acceptable salt or stereoisomer thereof.

17. The compound according to claim 2 wherein R 3 represent hydrogen, methyl or isobutyl,

or pharmaceutically acceptable salt or stereoisomer thereof.

18. The compound according to claim 2 wherein R 4 is selected from the group consisting of cyclobutyl, cyclopentyl, cyclohexyl, 4-methyl-cyclopentyl and 4,4-difluorocyclohexyl,

or pharmaceutically acceptable salt or stereoisomer thereof.

19. The compound according to claim 2 which is selected from the following:

Cyclopentyl-[2-(4,5-dihydro-1,3-thiazol-2-yl)-1H-indol-7-yl]-amine;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-1,3-thiazol-4-yl]-methanol;

[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethanol;

(R)-2-[7-cyclopentylamino-5-(hydroxymethyl)-1H-indol-2-yl]-4,5-dihydro-thiazol-4-yl-methanol;

[(S)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(S)-2-(5-methyl-7-(4,4-difluorocyclohexan-4-yl)amino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(S)-2-(5-methyl-7-cyclobutylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(S)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-1,3-thiazol-4-yl]-methanol;

[(R)-2-(5-(dimethylamino)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-(pyrrol-3-yl)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-(1,3-imidazol-1-yl)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-(pyrazol-1-yl)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-acetylamino-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-phenoxymethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-(pyrrolidin-1-yl)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

Cyclopentyl-[5-chloro-2-((R)-4-isobutyl-4,5-dihydro-thiazol-2-yl)-1H-indol-7-yl)-amine;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

Cyclopentyl-[5-fluoro-2-(R)-4-ethyl-4,5-dihydro-thiazol-2-yl)-1H-indol-7-yl]-amine;

{(R)-2-[7-(methyl-cyclopentyl)amino-5-fluoro-1H-indol-2-yl]-4,5-dihydro-1,3-thiazol-4-yl}-methanol;

[(S)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(S)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(S)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethanol;

[(R)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-carboxylic acid ethyl ester;

[(S)-2-(5-phenoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethanol;

[(R)-2-(5-bromo-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-(pyridin-3-yl)oxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-methanesulfonylmethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-(isoindol-1,3-dion-2-yl)methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

[(R)-2-(5-bromo-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid ethyl ester;

[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethanol;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid ethyl ester;

[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-propyloxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-phenoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-(pyridin-3-yl)oxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-(pyridin-3-yl]oxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-(4-(methanesulfonyl)phenoxy)-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-phenoxymethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-phenylaminomethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-methanesulfonylmethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid methyl ester;

[(R)-2-(5-methanesulfonylmethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-acetic acid;

[(R)-2-(5-methanesulfonylmethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethanol;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl acetamide;

3-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propanol;

3-[(R)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

3-[(R)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-phenoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

3-[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-bromo-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

3-[(R)-2-(5-bromo-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

3-[(R)-2-(5-ethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

3-[(R)-2-(5-trifluoromethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid ethyl ester;

3-[(R)-2-(5-trifluoromethoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propionic acid;

[(S)-2-(5-methyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-oxazol-4-yl]-acetic acid;

[(S)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-oxazol-4-yl]-acetic acid;

[2-[((4S,5R)-5-aminomethyl-4-benzyl-dihydro-oxazol-2-yl)-5-chloro-1H-indol-7-yl]-cyclopentyl-amine;

{2-[(R)-5-((S)-1-amino-2-phenyl-ethyl)-4,5-dihydro-oxazol-2-yl]-5-chloro-1H-indol-7-yl}-cyclopentyl-amine;

Cyclopentyl-[2-(4,5-dihydro-oxadiazol-2-yl)-1H-indol-7-yl]-amine;

[2-(5-Methyl-7-cyclopentylamino-1H-indol-2-yl)-thiazol-4-yl]-methanol;

[2-(5-Methyl-7-cyclopentylamino-1H-indol-2-yl)-thiazol-5-yl]-methanol;

[2-(5-Methyl-7-cyclopentylamino-1H-indol-2-yl)-thiazol-4-yl]-carboxylic acid ethyl ester;

[2-(5-Methyl-7-cyclopentylamino-1H-indol-2-yl)-thiazol-4-yl]-carboxylic acid;

[2-(7-Cyclopentylamino-1H-indol-2-yl)-thiazol-4-yl]-methanol;

[2-(7-Cyclopentylamino-1H-indol-2-yl)-thiazol-4-yl]-carboxylic acid methyl ester;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-morpholin-4-yl-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)ethylamino-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)propylamino-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-methylamino-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-dimethylamino-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-[4-(methyl)piperazin-1-yl]ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(3-dimethylaminopyrrolidin-1-yl)-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(piperidin-4-yl)-ethanone;

2-[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(4-(methyl)piperazin-1-yl)-ethanone;

2-[(R)-2-(5-fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)ethylamino-ethanone;

2-[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(methylamino)-4-yl-ethanone;

2-[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)-ethanone;

2-[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-methylamino-ethanone;

2-[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(morpholin-4-yl)ethylamino-ethanone;

2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-1-(4-(methyl)piperazin-1-yl)-ethanone;

Cyclopentyl-{5-methanesulfonylmethyl-2-[(R)-4-(2-morpholin-4-yl-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-amine;

1-(4-{2-[(R)-2-(7-cyclopentylamino-5-methanesulfonylmethyl-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-ethanone;

Cyclopentyl-[2-((R)-4-pyrrolidin-1-ylmethyl-4,5-dihydro-thiazol-2-yl)-1H-indol-7-yl]-amine;

{5-Chloro-2-[(R)-4-(2-dimethylamino-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-cyclopentyl-amine;

{5-Chloro-2-[(R)-4-(2-piperazin-1-yl-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[2-(4-ethanesulfonyl-piperazin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

{5-Chloro-2-[(R)-4-(2-pyrazol-1-yl-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-cyclopentyl-amine;

(S)-1-{2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-pyrrolidine-2-carboxylic acid;

5-Chloro-2-[(R)-4-(2-methanesulfonyl-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-cyclopentyl-amine;

3-{2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]ethyl}-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester;

3-{2-[(R)-2-(5-chloro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-5-methyl-3H-imidazole-4-carboxylic acid;

Cyclopentyl-{2-[(R)-4-(2-methoxy-ethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-amine;

[2-((R)-4-aminomethyl-4,5-dihydro-thiazol-2-yl)-1H-indol-7-yl]-cyclopentyl-amine;

{2-[(R)-4-(R)-3-amino-pyrrolidin-1-ylethyl)-4,5-dihydro-thiazol-2-yl]-5-chloro-1H-indol-7-yl]-cyclopentyl-amine;

4-[(R)-2-(7-cyclopentylamino-5-ethoxy-1H-indol-2-yl)-4,5-dihydro-thiazol-4-ylethyl]-piperazin-2-one;

{2-[(R)-4-((S)-3-amino-pyrrolidin-1-ylethyl)-4,5-dihydro-thiazol-2-yl]-5-chloro-1H-indol-7-yl}-cyclopentyl-amine;

(5-Chloro-2-{(S)-4-[2-(3-dimethylamino-phenyl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(S)-2-(7-cyclopentylamino-5-chloro-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-ethanone;

1-(4-{2-[(S)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-ethanone;

(5-Methoxy-2-{(R)-4-[2-(pyrrolidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl)-cyclopentyl-amine;

(5-Methanesulfonylmethyl-2-{(S)-4-[(2-oxopiperazin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(R)-2-(7-cyclopentylamino-5-chloro-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-ethanone;

(5-Chloro-2-{(R)-4-[4-methyl-piperazin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[4-(hydroxy)piperidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[2-oxopiperazin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[(piperidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[(1,1-dioxo-thiomorpholin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(R)-4-[(2-oxopyrrolidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Fluoro-2-{(R)-4-(2-aminoethyl)-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(R)-2-(5-fluoro-7-cyclopentylamino)-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

(5-Fluoro-2-{(R)-4-[(morpholin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Fluoro-2-{(R)-4-(2-dimethylamino-ethyl)-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Fluoro-2-{(R)-4-[(pyrrolidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl)-cyclopentyl-amine;

(5-Fluoro-2-{(R)-4-[(1,1-dioxo-thiomorpholin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Fluoro-2-{(R)-4-[(2-oxopyrrolidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(5-Fluoro-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

(5-Fluoro-2-{(R)-4-[methanesulfonyl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(2-{(R)-4[2-dimethylamino-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(2-{(R)-4-[(piperidin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

1-(4-{2-[(R)-2-(7-cyclopentylamino)-5-chloro-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-propyl}-piperazin-1-yl)-ethanone;

2-{(R)-4-[(morpholin-4-yl)-methyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-(R)-4-[(morpholin-4-yl)-propyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(2-{(R)-4[2-dimethylamino-methyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(S)-4-[(morpholin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-

1-(4-{2-[(S)-2-(5-phenoxy-7-cyclopentylamino)-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

(5-Phenoxy-2-{(S)-4-[(piperazin-1-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine

t-Butyl-(4-{2-[(S)-2-(5-phenoxy-7-cyclopentylamino)-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazine-1-carboxylate;

Cyclopentyl-(5-phenoxy-2-{(S)-4-[2-(3-fluoromethyl-5,6-dihydro-8H[1,2,4]triazolo[4,3-a]pyrazin-7-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-amine;

(5-Phenoxy-2-{(S)-4-[2-oxopiperazin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(4-{2-[(S)-2-(5-phenoxy-7-cyclopentylamino)-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-oxoran-2-yl-methanone;

(5-Phenoxy-2-{(S)-4-[(pyridin-2-yl)piperazine-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Phenoxy-2-{(S)-4-[(2-fluorophenyl)piperazine-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Chloro-2-{(S)-4[2-oxopiperazin-4-yl)-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Phenoxy-2-{(S)-4-[(3S)-3-(amino)pyrrolidin-1-yl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

1-(4-{2-[(S)-2-(5-phenoxy-7-cyclopentylamino)-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-ethanone;

(5-Chloro-[(S)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl])-pyrrolidin-3-yl-acetamide;

(5-Phenoxy-2-{(S)-4-[4-(benzyl)piperazin-1-yl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Phenoxy-2-{(R)-4-[pyrrolidin-1-yl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Phenoxy-2-{(S)-4-[pyrrolidin-1-yl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-cyclopentyl-amine;

(5-Methyl-2-{(S)-4-[2-oxopiperazin-4-yl-ethyl]-4,5-dihydro-thiazol-2-yl}-1H-indol-7-yl)-4,4-difluorocyclohexyl-amine;

(5-Methyl-2-{(S)-4-[morpholin-4-yl-ethyl]-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl)-4,4-difluorocyclohexyl-amine;

1-(4-{2-[(R)-2-(5-methoxy-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-ethyl}-piperazin-1-yl)-2-hydroxy-ethanone;

[(R)-2-(5-aminomethyl-7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-yl]-methanol;

Furan-2-carboxylic acid[7-cyclopentylamino-2-((R)-4-hydroxymethyl-4,5-dihydro-thiazol-2-yl)-1H-indol-5-ylmethyl]-amide;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-ylmethoxy]-acetic acid methyl ester;

[(R)-2-(7-cyclopentylamino-1H-indol-2-yl)-4,5-dihydro-thiazol-4-ylmethoxy]-acetic acid;

Cyclopentyl-{2-[(R)-4-(3-cyclopentyl-[1,2,4]oxadiazol-5-ylmethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-amine; and

Cyclopentyl-{2-[(R)-4-(3-piperidin-1-yl-[1,2,4]oxadiazol-5-ylmethyl)-4,5-dihydro-thiazol-2-yl]-1H-indol-7-yl}-amine,

or pharmaceutically acceptable salt or stereoisomer thereof.

20. A composition which comprises the compound of formula (1), or pharmaceutically acceptable salt or stereoisomer thereof as defined in claim 1 as an active ingredient together with pharmaceutically acceptable carrier or diluent.