三氟乙酸 、
benzyloxycarbonyl D-alanyl L-α-hydroxyhydrocinnamyl L-valyl D-α-hydroxyhydrocinnamyl D-alanyl L-α-hydroxyhydrocinnamyl L-valyl D-α-hydroxyhydrocinnamic acid t-butyl ester 在
palladium on activated charcoal
氢气 作用下,
以
乙酸乙酯 为溶剂,
反应 5.0h,
以99%的产率得到D-alanyl L-α-hydroxyhydrocinnamyl L-valyl D-α-hydroxyhydrocinnamyl D-alanyl L-α-hydroxyhydrocinnamyl L-valyl D-α-hydroxyhydrocinnamic acid t-butyl ester trifluoroacetate