PROCESS FOR THE PRODUCTION OF 1,5-BENZOTHIAZAPINE-DERIVATIVES

摘要

Novel 1,5-benzothiazepine derivatives of the formula: (I) wherein R1 is hydrogen or lower alkyl, R2 is hydrogen, lower alkanoyl or benzyl, R3 is hydrogen or lower alkyl and either one of R4 and R5 is hydrogen and the other is chlorine, or a pharmaceutically acceptable acid addition salt thereof are disclosed. Said derivative (I) and its salt have a potent platelet aggregation-inhibiting activity.