Benzoic acid (2R,4S)-4-(tert-butoxycarbonyl-methyl-amino)-4-[(S)-1-((1S,2R)-1-carboxy-2-methoxy-2-phenyl-ethylcarbamoyl)-ethylcarbamoyl]-2-methyl-butyl ester 在
1-羟基苯并三唑一水物 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、
N,N-二异丙基乙胺 、
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
生成 benzoic acid 4-{1-[2-methoxy-1-(1-{[1-(1-methoxycarbonyl-2,4-dimethyl-pent-3-enylcarbamoyl)-3-methyl-butyl]-methyl-carbamoyl}-2-methyl-propylcarbamoyl)-2-phenyl-ethylcarbamoyl]-ethylcarbamoyl}-2-methyl-4-methylamino-butyl ester