Triazolo[4,5-d]pyrimidine derivatives and their use as purinergic receptor antagonists

1. A pharmaceutical composition comprising a compound of formula (I), or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable carrier:

wherein

R 1 is selected from the group consisting of H, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, halogen, CN, NR 5 R 6 , NR 4 COR 5 , NR 4 CONR 5 R 6 , NR 4 CO 2 R 7 and NR 4 SO 2 R 7 ;

R 2 is an aryl attached via an unsaturated ring carbon of said aryl group;

R 3 is selected from the group consisting of H, alkyl, COR 5 , CO 2 R 7 , CONR 5 R 6 , CONR 4 NR 5 R 6 and SO 2 R 7 ;

R 4 , R 5 and R 6 are independently selected from the group consisting of H, alkyl and aryl, or where R 5 and R 6 are in an NR 5 R 6 group, R 5 and R 6 may be linked to form a heterocyclic group, or where R 4 , R 5 and R 6 are in a (CONR 4 NR 5 R 6 ) group, R 4 and R 5 may be linked to form a heterocyclic group; and

R 7 is selected from the group consisting of alkyl and aryl.

2. The composition according to claim 1 wherein R 1 is selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, halogen, CN, NR 5 R 6 , NR 4 COR 5 , NR 4 CONR 5 R 6 , NR 4 CO 2 R 7 and NR 4 SO 2 R 7 .

3. The composition according to claim 1 wherein R 1 is selected from the group consisting of alkyl, alkoxy, alkylthio, NR 5 R 6 , NR 4 COR 5 , NR 4 CONR 5 R 6 , NR 4 CO 2 R 7 and NR 4 SO 2 R 7 .

4. The composition according to claim 1 wherein R 1 is selected from the group consisting of NR 5 R 6 , NR 4 COR 5 , NR 4 CONR 5 R 6 , NR 4 CO 2 R 7 and NR 4 SO 2 R 7 .

5. The composition according to claim 1 wherein R 1 is NR 5 R 6 .

6. The composition according to claim 1 wherein R 1 is NH 2 .

7. The composition according to claim 1 wherein R 1 is selected from the group consisting of haloalkyl and arylalkyl.

8. The composition according to claim 1 wherein R 2 is not ortho, ortho-disubstituted.

9. The composition according to claim 1 wherein R 2 is not substituted at either ortho position.

10. The composition according to claim 1 wherein R 2 is a heteroaryl group.

11. The composition according to claim 10 wherein R 2 is a heteroaryl group which is attached to the pyrimidine ring of formula (I) such that a heteroatom is adjacent to the unsaturated carbon atom attached to said pyrimidine ring.

12. The composition according to claim 10 wherein R 2 is an N, O or S-containing heteroaryl group.

13. The composition according to claim 10 wherein R 2 is selected from the group consisting of furyl, thienyl, pyridyl, thiazolyl, pyrazolyl, triazolyl, pyrrolyl and oxazolyl.

14. The composition according to claim 10 wherein R 2 is selected from the group consisting of 2-furyl, 2-thienyl, 2-thiazolyl, 2-pyridyl, 3-pyrazolyl, 2-pyrrolyl, 4-triazolyl and 5-oxazolyl.

15. The composition according to claim 10 wherein R 2 is selected from the group consisting of furyl, thienyl, pyridyl, thiazolyl and pyrazolyl.

16. The composition according to claim 10 wherein R 2 is selected from the group consisting of 2-furyl, 2-thienyl, 2-thiazolyl, 2-pyridyl and 3-pyrazolyl.

17. The composition according to claim 10 wherein R 2 is 2-furyl.

18. The composition according to claim 1 wherein R 2 is phenyl.

19. The composition according to claim 1 wherein R 3 is selected from the group consisting of H and substituted alkyl.

20. The composition according to claim 19 wherein R 3 is an alkyl substituted by a substituent selected from the group consisting of aryl, cycloalkyl, non-aromatic heterocyclyl, CN, CO 2 R 5 , CONR 5 R 6 , CONR 4 NR 5 R 6 and C(═NR 4 )NR 5 R 6 .

21. The composition according to claim 19 wherein R 3 is an alkyl substituted by aryl.

22. The composition according to claim 21 wherein R 3 is (CR 9 R 10 ) n R 11 wherein n is 1 to 6, R 9 and R 10 are independently selected from H, alkyl and aryl, and R 11 is a substituted aryl or substituted heteroaryl.

23. The composition according to claim 22 wherein R 11 is selected from the group consisting of mono-substituted, di-substituted, and tri-substituted aryl groups represented by the formula Ar(R 12 ) a (R 13 ) b (R 14 ) c wherein:

Ar is an aryl group;

R 12 , R 13 and R 14 are substituent group(s), the same or different; and

a, b and c are 0 or 1 such that a+b+c≧1.

24. The composition according to claim 22 wherein n is 1 to 3.

25. The composition according to claim 22 wherein n is 1.

26. The composition according to claim 22 wherein each of R 9 and R 10 are selected from H and alkyl.

27. The composition according to claim 22 wherein at least one of R 9 and R 10 is H.

28. The composition according to claim 22 wherein both R 9 and R 10 are H.

29. The composition according to claim 23 wherein R 12 , R 13 and R 14 are independently selected from the group consisting of NR 5 R 6 , alkyl, alkoxy, halogen, NO 2 , CN, hydroxy, NHOH, CHO, CONR 5 R 6 , CO 2 R 5 , NR 4 COR 5 , NR 4 CO 2 R 7 , NR 4 SO 2 R 7 , OCO 2 R 7 , and aryl.

30. The composition according to claim 23 wherein R 12 , R 13 and R 14 are independently selected from the group consisting of NR 5 R 6 , alkyl and halogen.

31. The composition according to claim 29 wherein R 12 , R 13 and R 14 are a substituted alkyl which is selected from the group consisting of alkoxyalkyl, hydroxyalkyl, aminoalkyl and haloalkyl.

32. The composition according to claim 29 wherein R 12 , R 13 and R 14 are independently selected from the group consisting of unsubstituted alkyl, NH 2 and fluoro.

33. The composition according to claim 22 wherein said substituted aryl group R 11 or Ar is selected from the group consisting of phenyl, pyridyl, indolyl, furyl, thienyl, isoindolyl, indolinyl, isoxazolyl, oxazolyl, thiazolyl, pyrazinyl, pyrimidinyl, quinolinyl, benzoxadiazolyl, benzothiadiazolyl, benzotriazolyl, indazolyl, benzodioxolyl and dihydrobenzofuranyl.

34. The composition according to claim 22 wherein said substituted aryl group R 11 or Ar is selected from the group consisting of phenyl, pyridyl, indolyl, furyl and thienyl.

35. The composition according to claim 34 wherein said substituted aryl group R 11 or Ar is selected from the group consisting of phenyl, thienyl, furyl and pyridyl.

36. The composition according to claim 34 wherein said substituted aryl group R 11 or Ar is selected from the group consisting of phenyl, 2-thienyl, 2-furyl and 2-pyridyl.

37. The composition according to claim 1 wherein R 3 is selected from (CR 9 R 10 ) n R 8 wherein n is 1 to 6, R 9 and R 10 are independently selected from H, alkyl and aryl, and R 8 is selected from the group consisting of cycloalkyl, non-aromatic heterocyclic, CN, C 2 R 5 , CONR 5 R 6 , CONR 5 R 6 and C(═NR 4 )NR 5 R 6 .

38. The composition according to claim 37 wherein n is 1 to 3, and R 9 and R 10 are selected from the group consisting of H and alkyl.

39. The composition according to claim 37 wherein R 8 is CONR 5 R 6 , R 5 is hydrogen and R 6 is selected from the group consisting of unsubstituted alkyl and arylalkyl.

40. The composition according to claim 1 wherein R 3 is CONR 5 R 6 , R 5 is H and R 6 is arylalkyl.

41. The composition according to claim 1 wherein the compound is selected from the group:

7-(2-furyl)-1H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N,N-bis(2-fluorobenzyl)-3-(2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

methyl 3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)methylbenzoate;

3-(3,5-dimethoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-chloro-2-thienyl)methyl-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)methyl)phenyl-(1-methyl-1H-imidazol-4-yl)sulphonamide;

5-amino-N-benzyl-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylcarboxamide;

7-(2-furyl)-3-(3-methoxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

ethyl 5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylacetate;

3-(3cyanobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

7-(2-furyl)-3-(3-(3-pyridyl)propyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-trifluoromethylbenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-hydroxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-methyl-2-furyl)-1H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(1H-pyrazol-3-yl)-1H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(5-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methylbenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)acetic acid;

3-(3-chlorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(1H-pyrazol-3-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-methyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)acetamide;

(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-N-(3-chlorophenyl)acetamide;

7-(2-furyl)-3-(6-methoxy-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-thienylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(2-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(2-thienyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(5-methyl-2-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(3-(5-amino7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)benzyl)carbamate;

3-(2,5-dimethoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,6-difluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(4-methyl-2-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-thienyl)-1H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

6-chloro-N-(7-(2-furyl)-1H-[1,2,3]triazolo[4,5-d]pyrimidin-5-yl)pyridine-3-carboxamide;

3-(3-nitrobenzyl)-7-(5-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminomethylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin3-ylmethyl)-N,N-dimethylbenzamide;

3-(3-aminobenzyl)-7-(2-thienyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-N-methylbenzamide;

3-(3-aminobenzyl)-7-(5-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluoro-5-methoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-N-(2-pyridyl)acetamide;

(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-N-(2-pyridylmethyl)acetamide;

(5-amino-7-(2-furyl)-3H-[ 1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-N-phenylacetamide;

3-(3,5-dinitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-methyl-2-furyl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,3-difluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,4-difluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-methyl-2-furyl)-3-(6-methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,6-difluorobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

7-(5-methyl-2-furyl)-3-(2-thienylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-chlorobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-methoxy-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-methylbenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,5-difluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-methoxy-5-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-5-amine;

3-(5-amino-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-3-ylmethyl)-N-methylbenzamide;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)benzyl)acetamide;

3-(2-fluorobenzyl)-7-(5-oxazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-chloro-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

3-(6-fluoro-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-methoxybenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(3-(5-amino-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)benzyl)carbamate;

3-(2-aminobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

3-(3,5-diaminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminomethylbenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

7-(2-furyl)-3-(2-methoxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluoro-5-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-amino-2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluorobenzyl)-7-(1H-triazolo4yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-chloro-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-methyl-2-furyl)-3-(6-phenyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(2-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-amino-2-fluorobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)benzyl)-3-methylbenzamide;

7-(5-methyl-2-furyl)-3-(4-nitro-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-hydroxylamino-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-methyl-3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-amino-2-methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-amino-4methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine

3-(3,5-dimethylisoxazol-4-ylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5amine;

7-(2-furyl)-3-(3-methyl-2-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-cyclohexylmethyl-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methyl-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(5-methyl-2-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4amino-3-methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)benzoic acid;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)benzamide;

7-(2-furyl)-3-(2-methylthiazol-4-ylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

3-(3-aminomethylbenzyl)-7-(1H-pyrazol-3-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-N-isopropyl-N-methylbenzamide;

3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-N-isopropylbenzamide;

3-(2-amino-5-methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-cyano-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(5-methyl-2-pyrazinylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(8-quinolinylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-phenylthiazol-4-ylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(4-methyl-2-thiazolyl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-chloro-3-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(1,2,5-benzoxadiazol-5-yl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-methoxymethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5amine;

3-benzyl-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-amino-4-chlorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-nitro-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-hydroxylamino-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5amine;

7-(2-furyl)-3-(6methyl-4-nitro-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-hydroxylamino-6-methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4chloro-2-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-amino-4-chlorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-cyanobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3,4-dimethoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine trifluoroacetate salt;

7-(5-methyl-2-furyl)-3-(3-methyl-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-amino-3-methylbenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(5-methyl-3-oxazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methyl-4-pyridylmethyl)-3H-[1,2,3]triazolo[4,5)pyrimidine-5-amine;

3-(1,2,5-benzothiadiazol-4-ylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-pyrazinylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-fluoro-3-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-nitrobenzyl)-7-phenyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)-4-pyridylmethyl)carbamate;

7-(2-furyl)-3-(3-methoxy-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-ethyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-ethyl-4-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl 7-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-carboxylate;

tert-butyl 4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-carboxylate;

7-(2-furyl)-3-(4-indolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)benzyl)carbamate;

3-(4aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo4,5-d]pyrimidine-5-amine;

tert-butyl 5-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-carboxylate;

tert-butyl N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-3-ylmethyl)-2-fluorophenyl)carbamate;

3-(4-aminomethylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-ethyl-2-furyl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl 6-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-carboxylate;

3-(4-amino-3-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl (4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)-3,5-difluorophenyl)carbonate;

3-(2,6-difluoro-4-hydroxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(5-ethyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-phenyl-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-indolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(5-indolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyriridine-5-amine;

7-(2-furyl)-3-(7-indolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-fluoro-2-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,6-difluoro-4-methoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)benzyl)carbamate;

3-(1H-benzotriazol-5-ylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d[pyrimidine-5-amine

7-(2-furyl)-3-(2-methoxy-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)phenylacetamide;

3-(2-amninomethylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-(N,N-dimethylamine)benzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5amine;

3-(4-difluoromethoxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-phthalimidomethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine5-amine;

3-(3-amino-4-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2,3dihydrobenzofuran-5-ylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-bromo-2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2,3,5-trifluorobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluoro-5-iodobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-furylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-amino-5-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl (5-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)-2-nitrophenyl)carbonate;

3-(4-amino-3-hydroxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-amino-3-fluorobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(1H-pyrazol-3-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-hydroxy-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(6-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-2-pyridylmethyl)acetamide;

N-(2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)benzyl)acetamide;

7-(2-furyl)-3-(3-thienylmethyl)-3H-[1,2,3]triazolo(4,5-d]pyrimidine-5-amine;

3-(3-amino-2-methylbenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methyl-2-thienyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-alkyloxymethyl-2-pyridylmethyl)-N,N-dialkyl-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-methoxymethyl-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-aminobenzyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-alkyloxymethyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5amine;

3-(6-alkyloxymethyl-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-isopropyl4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(quinolin-2-ylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(4-(N-methylamino)benzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-(6-methyl-2-pyridyl)propanone;

3-(3-aminobenzyl)-7-(1H-pyrrole-2-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-nitrobenzyl)-7-(2-pyridyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-5-amine;

N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)phenyl)acetamide;

7-(2-furyl)-3-(4-nitro-2-(2-trimethylsilylethoxy)methoxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-ethyl-4-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-(2-thienylmethyl))-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

7-(2-furyl)-3-(6-isopropyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(1-(2H-tetrahyropyran-2-yl)indazol-5-ylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4,6-diisopropyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(5-indazolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-hydroxy-4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-vinyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl 5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-carboxylate;

tert-butyl 3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-carboxylate;

6-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)pyridine-2-carboxaldehyde

tert-butyl 2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)indole-1-caboxylate;

3-(2-indolylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrmidine-5-amine;

3-(5-ethyl-2-thienylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3,4-methylenedioxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-amino-3-ethylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-phenylethanone;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-methyl)phenyl)thiophene-2-carboxamide;

7-(2-furyl)-3-(6-hydroxymethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-methyl)phenyl)-3,3-dimethylbutanamide;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-methyl)phenyl)cyclopropanecarboxamide;

7-(2-furyl)-3-(6-n-propyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-isobutyloxymethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-bromomethyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolol[4,5-d]pyrimidine-5-amine;

3-(4-amino-3-isopropylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-cyanomethyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-hydroxybenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-(4-nitrophenyl)ethanone;

4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylacetyl)-benzonitrile;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)phenyl)propanesulphonamide;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)phenyl)-5-chloro-2-thiophenesuiphonamide;

7-(2-furyl)-3-(6-(N-methylamino)methyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-l -(4-(N,N-diethylamino)phenyl)ethanone;

7-(2-furyl)-3-(6-isopropyl-3-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-(4-methoxyphenyl)ethanone;

tert-butyl 7-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)-5-chloroindole-1-carboxylate;

3-(5-chloro-7-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)phenyl)-3,5-dimethylisoxazol-4-ylsulphonamide;

3-(6-(N,N-dimethylamino)methyl-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d ]pyrimidine-5-amine;

7-(2-furyl)-3-(6-methylthiomethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-(2-nitrophenyl)ethanone;

N-(3-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)phenyl)-1,2-dimethyl-1H-imidazol-4-ylsulphonamide;

N,N-bis(6-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-2-pyridylmethyl) methanesulphonamide;

7-(2-furyl)-3-(6-methylsulphonylmethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(6-(5-amino-7-(2-furyl)-3H-[1,2,3 ]triazolo[4,5-d]pyrimidin-3-ylmethyl)-2-pyridylmethyl)-N-methyl methanesulphonamide;

3-(3-aminobenzyl)-7-(4,5-dimethyl-2-thiazolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-amino-2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-indanone;

7-(2-furyl)-3-(5-methyl-7-indolylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-ylmethyl)-2-methylphenyl)formamide;

2-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-1-phenylpropanone;

3-(7-fluoro-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-isopropoxymethyl-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-ethyl-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-chloro-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(7-bromo-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-chloro-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine; 3-(3-(4-fluorobenzylamino)benzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-ethoxy-2-pyridylmethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-ethoxy-2-pyridylmethyl)-7-(5-methyl-2-furyl)-3H-[1,2,3]triazolo]4,5-d]pyrimidine-5-amine;

3-(3-(2-pyridylmethylamino)benzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(1-(4-trifluoromethylphenyl)ethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(6-fluoro-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(5-fluoro-2-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3,5-dimethyl-4-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(1-(3-fluorophenyl)ethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(7-chloro-5-indolyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(4-amino-3,5-dimethylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine

3-(1-(3-aminophenyl)ethyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(6-(2-methoxyethyl)-2-pyridylmethyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(1-(5,6-dimethyl-2-pyridyl)propyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-nitrobenzyl)-7-(1H-pyrazol-3-yl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine hydrochloride;

7-(5-methyl-2-furyl)-3-(2-methyl-3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(5-methyl-2-furyl)-3-(4-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)phenyl)-N-methylcarbamate;

tert-butyl 2-(5-amino-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7-yl)pyrrole-1-carboxylate;

7-(4,5-dimethylthiazol-2-yl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-fluoro-4-nitrobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

tert-butyl 7-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-3-ylmethyl)-5-methylindole-1-carboxylate, and

ethyl N-(4-(5-amino-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)methyl)-2-methylphenyl)carbamate.

42. The composition according to claim 1 wherein the compound is selected from the group consisting of: 3-(2-fluorobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(3-aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(3-methoxybenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

7-(2-furyl)-3-(2-nitrobenzyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine;

3-(2-aminobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine; and

3-(3-cyanobenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine.

43. A compound of formula (I) or a pharmaceutically acceptable salt thereof:

wherein

R 1 is selected from the group consisting of H, alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, halogen, CN, NR 5 R 6 , NR 4 COR 5 , NR 4 CONR 5 R 6 , NR 4 CO 2 R 7 and NR 4 SO 2 R 7 ;

R 2 is an aryl attached via an unsaturated ring carbon of said aryl group;

R 3 is selected from the group consisting of H, an alkyl, COR 5 , CO 2 R 7 , CONR 5 R 6 , CONR 4 NR 5 R 6 and SO 2 R 7 ;

R 4 , R 5 and R 6 are independently selected from the group consisting of H, alkyl and aryl, or where R 5 and R 6 are in an NR 5 R 6 group, R 5 and R 6 may be linked to form a heterocyclic group, or where R 4 , R 5 and R 6 are in a (CONR 4 NR 5 R 6 ) group, R 4 and R 5 may be linked to form a heterocyclic group; and

R 7 is selected from the group consisting of alkyl and aryl, provided that when R 3 is methyl, R 1 is not H.

44. The compound according to claim 43 , wherein R 3 is not methyl.

45. The compound according to claim 43 , wherein R 1 is NR 5 R 6 ;

R 2 is an N, O or S-containing heteroaryl group; and R 3 is an alkyl substituted by aryl.

46. The compound according to claim 43 , wherein R 1 is NH 2 ; R 2 is 2-furyl; R 3 is (CR 9 R 10 ) n R 11 wherein n is 1 to 6, R 9 and R 10 are independently selected from H, alkyl and aryl, and R 11 is a substituted aryl or heteroaryl group.

47. The compound of claim 43 wherein the compound of formula (I) is 3-(4-amino-3-methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo [4,5-d]pyrimidine-5-amine, or a pharmaceutically acceptable salt thereof.

48. The composition of claim 1 wherein the compound of formula (I) is 3-(4-amino-3-methylbenzyl)-7-(2-furyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidine-5-amine, or a pharmaceutically acceptable salt thereof.