A process for preparing perindopril (III) or a pharmaceutically acceptable salt thereof, which process comprises a substituted benzyl ester of (2S,3aS,7aS)-octahydroindole-2-carboxylic acid (I) with N-[(S)-carbethoxybutyl]-(S)-alanine (II) where R represents a halo, C1-4 alkoxy or nitro substituent.
一种制备贝利地普利(III)或其药用盐的方法,该方法包括将(2S,3aS,7aS)-辛氢
吲哚-2-羧酸(I)的取代苄酯与N-[(S)-羧乙氧基丁基]-(S)-丙
氨酸(II)反应,其中R代表卤素、C1-4烷氧基或硝基取代基。