Treprostinil derivative compounds and methods of using same

1. A compound represented by Formula (I):

wherein:

R 20 , R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 , R 28 , R 29 , R 30 , R 31 , R 32 , R 33 , R 34 , R 35 and R 36 are independently H or deuterium;

Z is —OH, —OR 11 , —N(R 11 )R 12 , —SR 11 or P 1 ;

R 11 is alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, haloalkyl, heteroalkyl, substituted heteroalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, alkylcycloalkyl, substituted alkylcycloalkyl, alkylcycloheteroalkyl, substituted alkylcycloheteroalkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, heteroaryl, substituted heteroaryl, alkylheteroaryl, or substituted alkylheteroaryl;

R 12 is H, haloalkyl, heteroalkyl, cycloheteroalkyl, alkylcycloalkyl, alkylcycloheteroalkyl, aryl, or heteroaryl;

P 1 is selected from the group consisting of:

wherein:

m is 1, 2, 3 or 4;

R 14 and R 15 are independently in each occurrence selected from the group consisting of H, alkyl, cycloalkyl, alkylcycloalkyl, haloalkyl, heteroalkyl, substituted alkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, substituted aryl, substituted heteroaryl, substituted arylalkyl, and substituted heteroarylalkyl; or

 R 14 and R 15 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring incorporating two ring heteroatoms chosen from N, O and S, which is unsubstituted or substituted with 1, 2 or 3 substituents independently selected from the group consisting of halo, methyl and methoxy;

R 18 and R 19 are independently in each occurrence hydrogen or alkyl, wherein the alkyl is unsubstituted or substituted with 1 substituent selected from the group consisting of halo, hydroxy, alkoxy, amino, thio, methylthio, —C(O)OH, —C(O)O-(alkyl), —CONH 2 , aryl and heteroaryl, wherein the aryl or heteroaryl is unsubstituted or substituted with a substituent selected from the group consisting of alkyl, halo, haloalkyl, hydroxy, alkoxy, and haloalkoxy;

R 14 and R 18 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring;

R 14 and R 19 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring;

R 15 and R 18 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring; and

R 15 and R 19 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring; and

R 1 and R 2 are independently H or P 2 , wherein at least one of R 1 and R 2 is P 2 ,

wherein P 2 is selected from the group consisting of:

wherein:

m is 1, 2, 3 or 4;

R 14 and R 15 are independently in each occurrence selected from the group consisting of H, alkyl, cycloalkyl, alkylcycloalkyl, haloalkyl, heteroalkyl, substituted alkyl, aryl, heteroaryl, arylalkyl, heteroarylalkyl, substituted aryl, substituted heteroaryl, substituted arylalkyl, and substituted heteroarylalkyl; or

 R 14 and R 15 taken together with the atom(s) to which they are attached optionally form a 5- to 7-membered ring incorporating one or two ring heteroatoms chosen from N, O and S, which is unsubstituted or substituted with 1, 2 or 3 substituents independently selected from the group consisting of halo, methyl and methoxy;

R 16 and R 17 are independently in each occurrence H or alkyl, or R 16 and R 17 taken together with the atom to which they are attached optionally form a 3- to 6-membered ring;

R 18 and R 19 are independently in each occurrence hydrogen or alkyl, wherein the alkyl is unsubstituted or substituted with 1 substituent selected from the group consisting of halo, hydroxy, alkoxy, amino, thio, methylthio, —C(O)OH, —C(O)O-(alkyl), —CONH 2 , aryl and heteroaryl, wherein the aryl or heteroaryl is unsubstituted or substituted with a substituent selected from the group consisting of alkyl, halo, haloalkyl, hydroxy, alkoxy, and haloalkoxy;

R 14 and R 18 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring; and

R 14 and R 19 taken together with the atoms to which they are attached optionally form a 5- to 7-membered ring;

or a pharmaceutically acceptable salt, a polymorph or a stereoisomer thereof.

2. The compound of claim 1 , wherein R 1 is P 2 and R 2 is H.

3. The compound of claim 1 , wherein R 1 is H and R 2 is P 2 .

4. The compound of claim 1 , wherein R 1 is P 2 and R 2 is P 2 .

5. The compound of claim 1 , wherein P 2 is selected from:

6. The compound of claim 1 , wherein P 2 is selected from:

7. The compound of claim 1 , wherein each of R 20 to R 36 is H.

8. The compound of claim 1 , wherein at least one of R 20 to R 36 is deuterium.

9. The compound of claim 1 , wherein Z is —OH, —OR 11 , —N(R 11 )R 12 or P 1 .

10. The compound of claim 1 , wherein Z is P 1 .

11. The compound of claim 1 , wherein Z is —OH.

12. A pharmaceutical composition comprising a compound of claim 1 or a pharmaceutically acceptable salt thereof and one or more pharmaceutically acceptable carriers or excipients.

13. The pharmaceutical composition of claim 12 , which is formulated for transdermal delivery, optionally via a patch.

14. A method of treating pulmonary hypertension, comprising administering to a subject in need of treatment a therapeutically effective amount of a compound of claim 1 or a pharmaceutically acceptable salt thereof.

15. The method of claim 14 , wherein the pulmonary hypertension is pulmonary arterial hypertension.

16. The method of claim 14 , wherein the compound is administered orally, topically or parenterally.

17. The method of claim 16 , wherein the compound is administered transdermally, optionally via a patch.

18. The method of claim 14 , further comprising administering an additional therapeutic agent selected from the group consisting of vasoactive agents, diuretics, anticoagulants and cardiac glycosides.