((S)-1-{3-[(S)-2-(Benzyloxycarbonyl-methyl-amino)-4-methyl-pentanoylamino]-4-hydroxy-pyrrolidine-1-carbonyl}-3-methyl-butyl)-methyl-carbamic acid benzyl ester 在
草酰氯 、
二甲基亚砜 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
生成 ((S)-1-{3-[(S)-2-(Benzyloxycarbonyl-methyl-amino)-4-methyl-pentanoylamino]-4-oxo-pyrrolidine-1-carbonyl}-3-methyl-butyl)-methyl-carbamic acid benzyl ester