N-2-chlorobenzyl-2-oxo and N-2-chlorobenzyl-2,2-dioxo-1,2,3-oxathiazolidine derivatives, their preparation and synthesis of thieno[3,2-c]pyridine derivatives therefrom
申请人:SANOFI
公开号:EP0497695A1
公开(公告)日:1992-08-05
Compounds of the formula:
wherein:
A is oxo or dioxo;
R¹, R² and R³ are independently hydrogen or lower alkyl of one to six carbon atoms;
R⁴, R⁵, R⁶ and R⁷ are independently hydrogen, lower alkyl of one to six carbon atoms, alkoxy, acyl or halo;
are advantageously converted to thieno[3,2-c]pyridine derivatives and the pharmaceutically acceptable salts thereof, particularly ticlopidine hydrochloride.