DEUTERIUM-ENRICHED RAMELTEON
The present application describes deuterium-enriched ramelteon, pharmaceutically acceptable salt forms thereof, and methods of treating using the same.
1 . A deuterium-enriched compound of formula I or a pharmaceutically acceptable salt thereof:
wherein R 1 -R 21 , are independently selected from H and D; and
the abundance of deuterium in R 1 -R 21 is at least 5%.
2 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 1 -R 21 , is selected from at least 5%, at least 10%, at least 14%, at least 19%, at least 24%, at least 29%, at least 33%, at least 38%, at least 43%, at least 48%, at least 52%, (k) at least 57%, at least 62%, at least 67%, at least 71%, at least 76%, at least 81%, at least 86%, at least 90%, at least 95%, and 100%.
3 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 1 is selected from at least 100%.
4 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 5 -R 6 is selected from at least 50% and 100%.
5 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 1 and R 5 -R 6 is selected from at least 33%, at least 67%, and 100%.
6 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 2 -R 6 is selected from at least 20%, at least 40%, at least 60%, at least 80%, and 100%.
7 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 7 -R 10 is selected from at least 25%, at least 50%, at least 75%, and 100%.
8 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 11 -R 17 is selected from at least 14%, at least 29%, at least 43%, at least 57%, at least 71%, at least 86%, and 100%.
9 . A deuterium-enriched compound of claim 1 , wherein the abundance of deuterium in R 18 -R 21 is selected from at least 25%, at least 50%, at least 75%, and 100%.
10 . A deuterium-enriched compound of claim 1 , wherein the compound is selected from compounds 1-8 of Table 1.
11 . A deuterium-enriched compound of claim 1 , wherein the compound is selected from compounds 9-16 of Table 2.
12 . An isolated deuterium-enriched compound of formula I or a pharmaceutically acceptable salt thereof:
wherein R 1 -R 21 , are independently selected from H and D; and
the abundance of deuterium in R 1 -R 21 is at least 5%.
13 . An isolated deuterium-enriched compound of claim 12 , wherein the abundance of deuterium in R 1 -R 21 is selected from at least 5%, at least 10%, at least 14%, at least 19%, at least 24%, at least 29%, at least 33%, at least 38%, at least 43%, at least 48%, at least 52%, (k) at least 57%, at least 62%, at least 67%, at least 71%, at least 76%, at least 81%, at least 86%, at least 90%, at least 95%, and 100%.
14 . An isolated deuterium-enriched compound of claim 12 , wherein the compound is selected from compounds 1-8 of Table 1.
15 . An isolated deuterium-enriched compound of claim 12 , wherein the compound is selected from compounds 9-16 of Table 2.
16 . A mixture of deuterium-enriched compounds of formula I or a pharmaceutically acceptable salt thereof:
wherein R 1 -R 21 , are independently selected from H and D; and
the abundance of deuterium in R 1 -R 21 is at least 5%.
17 . A mixture of deuterium-enriched compound of claim 16 , wherein the compound is selected from compounds 1-8 of Table 1.
18 . A mixture of deuterium-enriched compound of claim 16 , wherein the compound is selected from compounds 9-16 of Table 2.
19 . A pharmaceutical composition, comprising: a pharmaceutically acceptable carrier and a therapeutically effective amount of a compound of claim 1 or a pharmaceutically acceptable salt form thereof.
20 . A method for treating insomnia comprising: administering, to a patient in need thereof, a therapeutically effective amount of a compound of claim 1 or a pharmaceutically acceptable salt form thereof.