(S)-3-(1H-Indol-3-yl)-2-[3-methyl-3-(2,4,5-trimethyl-3,6-dioxo-cyclohexa-1,4-dienyl)-butyrylamino]-propionic acid 、
(S)-3-((S)-2-Amino-4-methylsulfanyl-butyrylamino)-N-((S)-1-methoxycarbonyl-2-phenyl-ethyl)-succinamic acid benzyl ester 在
N-甲基哌啶 、
氯甲酸异丁酯 作用下,
以
四氢呋喃 为溶剂,
生成 (S)-3-((S)-2-{(S)-3-(1H-Indol-3-yl)-2-[3-methyl-3-(2,4,5-trimethyl-3,6-dioxo-cyclohexa-1,4-dienyl)-butyrylamino]-propionylamino}-4-methylsulfanyl-butyrylamino)-N-((S)-1-methoxycarbonyl-2-phenyl-ethyl)-succinamic acid benzyl ester