IP Library Granted Patent US 8,883,823
Granted Patent B2
US 8,883,823 · App. 13/942,370 · Granted Nov 11, 2014

Crystalline forms of a prolyl hydroxylase inhibitor

Inventors: Claudia Witschi (San Francisco, CA); Jung Min Park (San Francisco, CA); Michael D. Thompson (Redwood City, CA); Michael John Martinelli (San Francisco, CA); David A. Yeowell (Chapel Hill, NC); Michael P. Arend (Foster City, CA)
Assignee: FibroGen, Inc.
A61K31/472A61K38/00A61K31/714A61K45/06A61K31/519C07D217/26A61K33/26
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Quick Facts
Patent No.
US 8,883,823
App. No.
13/942,370
Granted
Nov 11, 2014
Kind
B2
Abstract

The present disclosure relates to crystalline solid forms of [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid, the process of preparing the forms, and pharmaceutical compositions and methods of use thereof.

Claims (52)

1. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid (Compound A Form A) characterized by an X-ray powder diffractogram comprising the following peaks: 8.5, 16.2, and 27.4° 2θ±0.2° 2θ.

2. Compound A Form A according to claim 1 , wherein the diffractogram further comprises peaks at 12.8, 21.6, and 22.9° 2θ±0.2° 2θ.

3. Compound A Form A according to claim 1 , wherein the diffractogram is substantially as shown in FIG. 1 .

4. Compound A Form A according to claim 1 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 223° C.

5. Compound A Form A according to claim 4 , wherein the DSC curve is substantially as shown in FIG. 2 .

6. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid hemihydrate (Compound A Form B) characterized by an X-ray powder diffractogram comprising the following peaks: 4.2, 8.3, and 16.6° 2θ±0.2° 2θ.

7. Compound A Form B according to claim 6 , wherein the diffractogram further comprises peaks at 12.5, 14.1, and 17.4° 2θ±0.2° 2θ.

8. Compound A Form B according to claim 6 , wherein the diffractogram is substantially as shown in FIG. 3 .

9. Compound A Form B according to claim 6 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 222° C.

10. Compound A Form B according to claim 9 , wherein the DSC curve is substantially as shown in FIG. 4 .

11. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid hexafluoropropan-2-ol solvate (Compound A Form C) characterized by an X-ray powder diffractogram comprising the following peaks: 4.5, 13.7, and 16.4° 2θ±0.2° 2θ.

12. Compound A Form C according to claim 11 , wherein the diffractogram further comprises peaks at 15.4, 15.5, and 20.6° 2θ±0.2° 2θ.

13. Compound A Form C according to claim 11 , wherein the diffractogram is substantially as shown in FIG. 5 .

14. Compound A Form C according to claim 11 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 222° C.

15. Compound A Form C according to claim 14 , wherein the DSC curve is substantially as shown in FIG. 6 .

16. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid DMSO:water solvate (Compound A Form D) characterized by an X-ray powder diffractogram comprising the following peaks: 8.4, 8.5, and 16.8° 2θ±0.2° 2θ.

17. Compound A Form D according to claim 16 , wherein the diffractogram further comprises peaks at 4.2, 12.6, and 28.4° 2θ±0.2° 2θ.

18. Compound A Form D according to claim 16 , wherein the diffractogram is substantially as shown in FIG. 7 .

19. Compound A Form D according to claim 16 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 222° C.

20. Compound A Form D according to claim 19 , wherein the DSC curve is substantially as shown in FIG. 8 .

21. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid sodium salt (Compound A sodium salt) characterized by an X-ray powder diffractogram comprising the following peaks: 5.3, 16.0, and 21.6° 2θ±0.2° 2θ.

22. Compound A sodium salt according to claim 21 , wherein the diffractogram further comprises peaks at 18.7, 19.2, and 24.0° 2θ±0.2° 2θ.

23. Compound A sodium salt according to claim 21 , wherein the diffractogram is substantially as shown in FIG. 9 .

24. Compound A sodium salt according to claim 21 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 314° C.

25. Compound A sodium salt according to claim 24 , wherein the DSC curve is substantially as shown in FIG. 10 .

26. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid L-arginine salt (Compound A L-arginine salt) characterized by an X-ray powder diffractogram comprising the following peaks: 20.8, 21.8, and 25.4° 2θ±0.2° 2θ.

27. Compound A L-arginine salt according to claim 26 , wherein the diffractogram further comprises peaks at 22.7, 23.4, and 26.4° 2θ±0.2° 2θ.

28. Compound A L-arginine salt according to claim 26 , wherein the diffractogram is substantially as shown in FIG. 11 .

29. Compound A L-arginine salt according to claim 26 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 210° C.

30. Compound A L-arginine salt according to claim 29 , wherein the DSC curve is substantially as shown in FIG. 12 .

31. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid L-lysine salt (Compound A L-lysine salt) characterized by an X-ray powder diffractogram comprising the following peaks: 19.8, 20.7, and 21.2° 2θ±0.2° 2θ.

32. Compound A L-lysine salt according to claim 31 , wherein the diffractogram further comprises peaks at 10.2, 16.9, and 18.4° 2θ±0.2° 2θ.

33. Compound A L-lysine salt according to claim 31 , wherein the diffractogram is substantially as shown in FIG. 13 .

34. Compound A L-lysine salt according to claim 31 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 237° C.

35. Compound A L-lysine salt according to claim 34 , wherein the DSC curve is substantially as shown in FIG. 14 .

36. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid ethanolamine salt (Compound A ethanolamine salt) characterized by an X-ray powder diffractogram comprising the following peaks: 21.8, 22.7, and 27.1° 2θ±0.2° 2θ.

37. Compound A ethanolamine salt according to claim 36 , wherein the diffractogram further comprises peaks at 21.1, 26.2, and 26.6° 2θ±0.2° 2θ.

38. Compound A ethanolamine salt according to claim 36 , wherein the diffractogram is substantially as shown in FIG. 15 .

39. Compound A ethanolamine salt according to claim 36 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 171° C.

40. Compound A ethanolamine salt according to claim 39 , wherein the DSC curve is substantially as shown in FIG. 16 .

41. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid diethanolamine salt (Compound A diethanolamine salt) characterized by an X-ray powder diffractogram comprising the following peaks: 16.9, 23.7, and 25.0° 2θ±0.2° 2θ.

42. Compound A diethanolamine salt according to claim 41 , wherein the diffractogram further comprises peaks at 19.6, 22.6, and 26.0° 2θ±0.2° 2θ.

43. Compound A diethanolamine salt according to claim 41 , wherein the diffractogram is substantially as shown in FIG. 17 .

44. Compound A diethanolamine salt according to claim 41 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 150° C.

45. Compound A diethanolamine salt according to claim 44 , wherein the DSC curve is substantially as shown in FIG. 18 .

46. Crystalline [(4-hydroxy-1-methyl-7-phenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid tromethamine salt (Compound A tromethamine salt) characterized by an X-ray powder diffractogram comprising the following peaks: 10.1, 14.2, and 21.1° 2θ±0.2° 2θ.

47. Compound A tromethamine salt according to claim 46 , wherein the diffractogram further comprises peaks at 20.1, 25.7, and 28.4° 2θ±0.2° 2θ.

48. Compound A tromethamine salt according to claim 46 , wherein the diffractogram is substantially as shown in FIG. 19 .

49. Compound A tromethamine salt according to claim 46 , characterized by a differential scanning calorimetry (DSC) curve that comprises an endotherm at about 176° C.

50. Compound A tromethamine salt according to claim 49 , wherein the DSC curve is substantially as shown in FIG. 20 .

51. A pharmaceutical composition comprising Compound A Form A according to claim 1 , and a pharmaceutically acceptable excipient.

52. The pharmaceutical composition of claim 51 , further comprising at least one additional therapeutic agent selected from the group consisting of vitamin B12, folic acid, ferrous sulfate, recombinant human erythropoietin, and an erythropoiesis stimulating agent (ESA).

Assignments (4)
CHANGE OF NAME Recorded Feb 18, 2026
From: FIBROGEN, INC.
To: KYNTRA BIO, INC.
Reel/Frame 074923/0352 →
RELEASE OF SECURITY INTEREST Recorded Sep 3, 2025
From: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT
To: FIBROGEN, INC.
Reel/Frame 072785/0760 →
SECURITY INTEREST Recorded May 1, 2023
From: FIBROGEN, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 063504/0221 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 22, 2013
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN; YEOWELL, DAVID A.; AREND, MICHAEL
To: FIBROGEN, INC.
Reel/Frame 031456/0395 →
Continuity (3)
Provisional Application 61672191 · Jul 16, 2012
Provisional Application 61768297 · Feb 22, 2013
Related Publication 20140024675A1 · Jan 23, 2014