(S)-2-((R)-5-tert-Butoxycarbonylmethyl-7-methoxy-4-oxo-2,3,4,5-tetrahydro-benzo[b][1,4]thiazepin-3-ylamino)-4-phenyl-butyric acid ethyl ester 在
盐酸 作用下,
以
乙酸乙酯 为溶剂,
以95%的产率得到(S)-2-((R)-5-Carboxymethyl-7-methoxy-4-oxo-2,3,4,5-tetrahydro-benzo[b][1,4]thiazepin-3-ylamino)-4-phenyl-butyric acid ethyl ester; hydrochloride