7-[2S-(3-hydroxy-4-naphthalen-2-yl-butyl)-5-oxo-pyrrolidin-1-yl]-heptanoic acid ethyl ester 、
2-{3-[2-oxo-5S-(3-oxo-4-phenyl-butyl)-pyrrolidin-1-yl]-propyl}-thiazole-4-carboxylic acid ethyl ester 在
sodium tetrahydroborate 作用下,
以
乙醇 为溶剂,
生成 2-{3-[2S-(3-hydroxy-4-phenyl-butyl)-5-oxo-pyrrolidin-1-yl]-propyl}-thiazole-4-carboxylic acid ethyl ester