5-{(S)-4-{[(Benzhydryl-carbamoyl)-methoxycarbonylmethyl]-carbamoyl}-4-[(S)-2-tert-butoxycarbonylamino-3-(4-hydroxy-phenyl)-propionylamino]-butylcarbamoyl}-pentanoic acid benzyl ester 在
palladium on activated charcoal
氢气 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以79%的产率得到5-{(S)-4-{[(Benzhydryl-carbamoyl)-methoxycarbonylmethyl]-carbamoyl}-4-[(S)-2-tert-butoxycarbonylamino-3-(4-hydroxy-phenyl)-propionylamino]-butylcarbamoyl}-pentanoic acid