A novel process for preparing 1,5-benzothiazepine derivative \x9bII!: ##STR1## wherein Ring A and Ring B are substituted or unsubstituted benzene ring, and R.sup.3 is H, (di-lower alkylamino)-lower alkyl or substituted or unsubstituted piperazinyl-lower alkyl, or a salt thereof, in high yield and in a single step from a novel 3-(2-amino-substituted or unsubstituted phenylthio)-2-hydroxy-3-substituted or unsubstituted phenylpropionamide compound. Said 1,5-benzothiazepine derivative \x9bII! is useful as an intermediate for preparing medicaments such as diltiazem hydrochloride.
一种制备1,5-
苯并噻吩衍
生物的新工艺,其中环A和环B是取代或未取代的苯环,R.sup.3为H,(二-低烷基
氨基)-低烷基或取代或未取代的
哌嗪基-低烷基,或其盐,在从新的3-(2-
氨基取代或未取代的苯
硫基)-2-羟基-3-取代或未取代的苯丙酰胺化合物中高产率地且单步完成。所述1,5-
苯并噻吩衍
生物\x9bII!可用作制备药物如
盐酸地尔硫卓的中间体。