2-aminobenzoxazole carboxamides as 5HT3 modulators
申请人:Albany Molecular Research, Inc.
公开号:US07863271B2
公开(公告)日:2011-01-04
Compounds of formulae I, II and III:
are disclosed as 5-HT3 inhibitors. The compounds are useful in treating CINV, IBS-D and other diseases and conditions.
Enantiopure 3-substituted morpholines were assembled through ring-opening of a N-2-benzothiazolesulfonyl (Bts) activated aziridine with organocuprates followed by a ring annulation reaction with a vinylsulfonium salt under microwave conditions. Deprotection of the N-Bts group proceeds under very mild conditions with 2-mercaptoacetic acid and LiOH at rt.