(S)-2-{(S)-2-[(S)-2-(2-{2-[(S)-2-tert-Butoxycarbonylamino-3-(4-tert-butoxy-phenyl)-propionylamino]-acetylamino}-acetylamino)-3-phenyl-propionylamino]-4-methyl-pentanoylamino}-3-(1H-indol-3-yl)-propionic acid 在
N,N'-二环己基碳二亚胺 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 3.0h,
生成 {(S)-2-(4-tert-Butoxy-phenyl)-1-[({[((S)-1-{(S)-1-[4-(1H-indol-3-ylmethyl)-5-oxo-4,5-dihydro-oxazol-2-yl]-3-methyl-butylcarbamoyl}-2-phenyl-ethylcarbamoyl)-methyl]-carbamoyl}-methyl)-carbamoyl]-ethyl}-carbamic acid tert-butyl ester