Prodrugs of pyridone amides useful as modulators of sodium channels
The invention relates to prodrug compounds of formula I: wherein R 2 , R 3 , R 5 , R 7 and X are as defined herein. The invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders, including pain. The compounds of formula I possess advantageous solubility and physicochemical properties.
1. A compound selected from the group consisting of
(4-(4,5-dichloro-2-(4-fluoro-2-methoxyphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(4-fluoro-2-methoxyphenoxy)-4-(perfluoroethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(4,5-dichloro-2-(4-fluorophenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(4-fluoro-2-methoxyphenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(2-oxo-4-(2-(4-(trifluoromethoxy)phenoxy)-4-(trifluoromethyl)benzamido)pyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(4-fluorophenoxy)-4-(perfluoroethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(5-chloro-2-(4-fluoro-2-methoxyphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(2-oxo-4-(2-(4-(trifluoromethoxy)phenoxy)-5-(trifluoromethyl)benzamido)pyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(4-fluoro-2-methylphenoxy)-4-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(4-fluoro-2-methylphenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(2-chloro-4-fluorophenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(5-chloro-2-(4-fluoro-2-methylphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(4-chloro-2-(4-fluoro-2-methylphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(5-chloro-2-(2-chloro-4-fluorophenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(2-oxo-4-(2-(o-tolyloxy)-5-(trifluoromethyl)benzamido)pyridin-1(2H)-yl)methyl dihydrogen phosphate;
(4-(2-(2,4-difluorophenoxy)-4-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate;
(2-oxo-4-(2-(2-(trifluoromethoxy)phenoxy)-5-(trifluoromethyl)benzamido)pyridin-1(2H)-yl)methyl dihydrogen phosphate; and
(4-(2-(4-fluorophenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
2. A pharmaceutical composition comprising the compound according to claim 1 , and a pharmaceutically acceptable carrier, adjuvant, or vehicle.
3. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(2-(4-fluoro-2-methylphenoxy)-4-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
4. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(2-(4-fluoro-2-methoxyphenoxy)-4-(perfluoroethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
5. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(4-chloro-2-(4-fluoro-2-methylphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
6. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(2-(4-fluoro-2-methylphenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
7. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(2-(4-fluorophenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
8. The pharmaceutical composition according to claim 2 , wherein the compound is
(4-(4,5-dichloro-2-(4-fluoro-2-methoxyphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
9. A method of inhibiting a voltage-gated sodium channel in a subject comprising administering to the subject the compound according to claim 1 .
10. The method of claim 9 , wherein the voltage-gated sodium channel is Na V 1.8.
11. A method of treating or lessening the severity in a subject of chronic pain, gut pain, neuropathic pain, musculoskeletal pain, acute pain, inflammatory pain, cancer pain, idiopathic pain, multiple sclerosis, Charcot-Marie-Tooth syndrome, incontinence, pathological cough, or cardiac arrhythmia comprising administering to the subject an effective amount of the compound according to claim 1 .
12. The method of claim 11 , wherein the method comprises treating or lessening the severity in a subject of neuropathic pain.
13. The method of claim 11 , wherein the method comprises treating or lessening the severity in a subject of musculoskeletal pain.
14. The method of claim 13 , wherein the musculoskeletal pain comprises osteoarthritis pain.
15. The method of claim 11 , wherein the method comprises treating or lessening the severity in a subject of inflammatory pain.
16. The method according to claim 11 , wherein the compound is
(4-(2-(4-fluoro-2-methylphenoxy)-4-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
17. The method according to claim 11 , wherein the compound is
(4-(2-(4-fluoro-2-methoxyphenoxy)-4-(perfluoroethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
18. The method according to claim 11 , wherein the compound is
(4-(4-chloro-2-(4-fluoro-2-methylphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
19. The method according to claim 11 , wherein the compound is
(4-(2-(4-fluoro-2-methylphenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
20. The method according to claim 11 , wherein the compound is
(4-(2-(4-fluorophenoxy)-5-(trifluoromethyl)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.
21. The method according to claim 11 , wherein the compound is
(4-(4,5-dichloro-2-(4-fluoro-2-methoxyphenoxy)benzamido)-2-oxopyridin-1(2H)-yl)methyl dihydrogen phosphate.