Cyanoisoquinoline compounds and methods of use thereof

1. A method for inhibiting a HIF hydroxylase in a subject, the method comprising administering to the subject a compound of formula I:

wherein:

R is selected from the group consisting of hydrogen, alkyl, and substituted alkyl;

R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrogen, halo, cyano, hydroxyl, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, amino, substituted amino, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl;

R 5 and R 6 are independently selected from the group consisting of hydrogen and C 1-3 alkyl;

or a pharmaceutically acceptable salt, tautomer, or stereoisomer thereof; or an ester or amide of the carboxylic acid moiety on the glycine or alanine-based substituent of the cyanoisoquinoline ring.

2. The method of claim 1 , wherein the HIF hydroxylase is a HIF prolyl hydroxylase.

3. The method of claim 2 , wherein the prolyl hydroxylase is selected from the group consisting of human EGLN1, EGLN2, and EGLN3.

4. The method of claim 1 , wherein the subject is a human.

5. The method of claim 1 , wherein the subject is in need of treating, pretreating, or delaying onset of a condition associated with hypoxia inducible factor (HIF).

6. The method of claim 1 , wherein at least two of R 1 , R 2 , R 3 and R 4 are hydrogen.

7. The method of claim 1 , wherein R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen, hydroxyl, halo, substituted alkyl, aryl, —OR 7 , —SR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

8. The method of claim 1 , wherein R 1 , R 2 , R 3 , and R 4 are selected from the group consisting of hydrogen, halo, haloalkyl, alkyl, alkoxy, aryloxy and substituted aryloxy.

9. The method of claim 1 , wherein R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen, hydroxyl, phenyl, chloro, trifluoromethyl, benzyl, benzyloxy, methoxy, butoxy, isopropoxy, phenoxy, 4-fluorophenoxy, 2-methoxyphenoxy, 3-methoxyphenoxy, 4-methoxyphenoxy, 2,6-dimethylphenoxy, 2-ethyl-6-methylphenoxy, 2,4,6-trimethylphenoxy, 4-chloro-2,6-dimethylphenoxy, 4-propoxyphenoxy, 2,3-dihydro-benzofuran-5-yloxy, 2-methyl-benzothiazol-6-yloxy, 2-dimethylamino-benzooxazol-5-yloxy, 2-morpholin-4-yl-benzothiazol-6-yloxy, 2-methyl-benzooxazol-6-yloxy, benzo[1,3]dioxo-5-yloxy, phenylsulfanyl, phenylsulfonyl, and cyclohexyloxy.

10. The method of claim 9 , wherein R 1 , R 3 and R 4 are hydrogen.

11. The method of claim 9 , wherein R 1 , R 2 and R 3 are hydrogen.

12. The method of claim 9 , wherein R 1 , R 2 , and R 4 are hydrogen.

13. The method of claim 9 , wherein R 2 , R 3 , and R 4 are hydrogen.

14. The method of claim 9 , wherein R 1 , R 2 , R 3 , and R 4 are hydrogen.

15. The method of claim 1 , wherein R 1 is selected from the group consisting of halo, cyano, hydroxyl, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, amino, substituted amino, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

16. The method of claim 1 , where R 1 is selected from the group consisting of phenyl, phenoxy and 4-fluorophenoxy.

17. The method of claim 1 , wherein R 2 is selected from the group consisting of halo, cyano, hydroxyl, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, amino, substituted amino, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

18. The method of claim 1 , wherein R 2 is selected from the group consisting of halo, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

19. The method of claim 18 , wherein R 2 is selected from the group consisting of chloro, methoxy, isopropoxy, phenoxy, 4-fluorophenoxy, 4-methoxyphenoxy, 2,6-dimethylphenoxy, 2-ethyl-6-methylphenoxy, 2,4,6-trimethylphenoxy, 4-chloro-2,6-dimethylphenoxy, 4-propoxyphenoxy, 2,3-dihydro-benzofuran-5-yloxy, 2-methyl-benzothiazol-6-yloxy, 2-dimethylamino-benzooxazol-5-yloxy, 2-morpholin-4-yl-benzothiazol-6-yloxy, 2-methyl-benzooxazol-6-yloxy, benzo[1,3]dioxo-5-yloxy, phenylsulfonyl, phenylsulfanyl, and cyclohexyloxy.

20. The method of claim 1 , wherein R 3 is selected from the group consisting of hydroxyl, halo, haloalkyl, substituted alkyl, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

21. The method of claim 20 , wherein R 3 is selected from the group consisting of trifluoromethyl, chloro, hydroxyl, benzyl, methoxy, isopropoxy, butoxy, benzyloxy, phenoxy, 4-fluorophenoxy, 2,6-dimethylphenoxy, 4-methoxyphenoxy, 2-dimethylamino-benzooxazol-5-yloxy, benzo[1,3]dioxo-5-yloxy, and phenylsulfanyl.

22. The method of claim 1 , wherein R 4 is selected from the group consisting of halo, cyano, hydroxyl, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, amino, substituted amino, —OR 7 , —SR 7 , —SOR 7 , and —SO 2 R 7 wherein R 7 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl.

23. The method of claim 1 , wherein R 4 is selected from the group consisting of phenyl, phenoxy, 2-methoxyphenoxy, 3-methoxyphenoxy, 4-methoxyphenoxy, and 4-fluorophenoxy.

24. The method of claim 1 , wherein R 5 is hydrogen.

25. The method of claim 1 , wherein R 5 is methyl.

26. The method of claim 1 , wherein R 6 is hydrogen.

27. The method of claim 1 , wherein R 6 is methyl.

28. The method of claim 1 , wherein R is hydrogen.

29. The method of claim 1 , wherein R is methyl.

30. The method of claim 1 , wherein the compound is of formula II:

wherein:

R 31 , R 32 , R 33 and R 34 are independently selected from the group consisting of hydrogen, cyano, hydroxyl, halo, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, amino, substituted amino, —OR 37 , —SR 37 , —SOR 37 , and —SO 2 R 37 wherein R 37 is selected from the group consisting of alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl;

R 35 is hydrogen or methyl;

or a pharmaceutically acceptable salt, tautomer, or stereoisomer thereof; or an ester or amide of the carboxylic acid moiety on the glycine- or alanine-based substituent of the cyanoisoquinoline ring.

31. The method of claim 30 , wherein at least three of R 31 , R 32 , R 33 , and R 34 are hydrogen.

32. The method of claim 30 , wherein R 31 , R 32 , R 33 and R 34 are independently selected from the group consisting of hydrogen, halo, hydroxyl, alkyl, substituted alkyl, haloalkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, heteroaryloxy, substituted heteroaryloxy, cycloalkoxy, substituted cycloalkoxy, amino, and substituted amino; and

R 35 is hydrogen or methyl.

33. The method of claim 32 , wherein R 31 , R 32 , R 33 and R 34 are independently selected from the group consisting of hydrogen, substituted alkyl, aryl, aryloxy, and substituted aryloxy; and R 35 is hydrogen or methyl.

34. The method of claim 33 , wherein R 31 , R 32 , R 33 and R 34 are independently selected from the group consisting of hydrogen, substituted alkyl, aryl, aryloxy, and aryloxy optionally substituted with from 1 to 3 substituents independently selected from the group consisting of halo, alkoxy, and alkyl; and R 35 is hydrogen or methyl.

35. The method of claim 34 , wherein R 31 , R 32 , R 33 and R 34 are independently selected from the group consisting of hydrogen, phenoxy and phenoxy substituted with halogen; and R 35 is hydrogen or methyl.

36. The method of claim 35 , wherein one of R 31 , R 32 , R 33 and R 34 is phenoxy substituted with halogen, the other three of R 31 , R 32 , R 33 and R 34 are hydrogen, and R 35 is hydrogen.

37. The method of claim 36 , wherein R 31 is phenoxy substituted with halogen, R 32 , R 33 and R 34 are hydrogen, and R 35 is hydrogen.

38. The method of claim 36 , wherein R 32 is phenoxy substituted with halogen, R 31 , R 33 and R 34 are hydrogen, and R 35 is hydrogen.

39. The method of claim 36 , wherein R 33 is phenoxy substituted with halogen, R 31 , R 32 and R 34 are hydrogen, and R 35 is hydrogen.

40. The method of claim 36 , wherein R 34 is phenoxy substituted with halogen, R 31 , R 32 and R 33 are hydrogen, and R 35 is hydrogen.

41. The method of claim 1 , wherein the compound is selected from the group consisting of:

{[1-cyano-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

2-(S)-[(1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-propionic acid,

{[1-cyano-4-hydroxy-7-phenoxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

2-(S)-[(1-cyano-4-hydroxy-7-phenoxy-isoquinoline-3-carbonyl)-amino]-propionic acid,

2-(R)-[(1-cyano-4-hydroxy-7-phenoxy-isoquinoline-3-carbonyl)-amino]-propionic acid,

{[1-cyano-7-(4-fluorophenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-7-(trifluoromethyl)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-7-chloro-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-8-phenoxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-8-(4-fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(1-cyano-4-hydroxy-6-methoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-6-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

{[1-cyano-6-(4-fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-6-(4-methoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(1-cyano-4-hydroxy-6-phenylsulfanyl-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-7-phenylsulfanyl-isoquinoline-3-carbonyl)-amino]-acetic acid,

{[1-cyano-6-(2,6-dimethyl-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(1-cyano-4-hydroxy-5-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

{[1-cyano-4-hydroxy-8-(4-methoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-8-(3-methoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-8-(2-methoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(7-benzyl-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

{[1-cyano-5-(4-fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-7-(2,6-dimethyl-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-6-(2-ethyl-6-methyl-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-6-(2,4,6-trimethyl-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[6-(4-chloro-2,6-dimethyl-phenoxy)-1-cyano-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-7-(4-methoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(1-cyano-6-cyclohexyloxy-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(6-benzenesulfonyl-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

{[1-cyano-4-hydroxy-6-(4-propoxy-phenoxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[7-(benzo[1,3]dioxol-5-yloxy)-1-cyano-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[6-(benzo[1,3]dioxol-5-yloxy)-1-cyano-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-6-(2,3-dihydro-benzofuran-5-yloxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(1-cyano-4-methoxy-8-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid methyl ester,

[(1-cyano-4-methoxy-8-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

(S)-2-[(1-cyano-4-hydroxy-8-phenoxy-isoquinoline-3-carbonyl)-amino]-propionic acid,

(R)-2-[(1-cyano-4-hydroxy-8-phenoxy-isoquinoline-3-carbonyl)-amino]-propionic acid,

{[1-cyano-4-hydroxy-6-(2-methyl-benzothiazol-6-yloxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-6-(2-dimethylamino-benzooxazol-5-yloxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-7-(2-dimethylamino-benzooxazol-5-yloxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-6-(2-morpholin-4-yl-benzothiazol-6-yloxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

{[1-cyano-4-hydroxy-6-(2-methyl-benzooxazol-6-yloxy)-isoquinoline-3-carbonyl]-amino}-acetic acid,

[(6-chloro-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(7-butoxy-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-7-methoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-7-isopropoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-6-isopropoxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-5-phenyl-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(1-cyano-4-hydroxy-8-phenyl-isoquinoline-3-carbonyl)-amino]-acetic acid,

[(7-benzyloxy-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

and [(1-cyano-4,7-dihydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid,

or a pharmaceutically acceptable salt, tautomer, or stereoisomer thereof; or an ester or amide of the carboxylic acid moiety on the glycine- or alanine-based substituent of the cyanoisoquinoline ring.