甲氧基-三氟甲基苯 、
[((S)-2-{[2-(Bis-tert-butoxycarbonylmethyl-amino)-ethyl]-tert-butoxycarbonylmethyl-amino}-1-hydroxymethyl-ethyl)-tert-butoxycarbonylmethyl-amino]-acetic acid tert-butyl ester 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以66.8%的产率得到(S)-3,3,3-Trifluoro-2-methoxy-2-phenyl-propionic acid (S)-2-(bis-tert-butoxycarbonylmethyl-amino)-3-{[2-(bis-tert-butoxycarbonylmethyl-amino)-ethyl]-tert-butoxycarbonylmethyl-amino}-propyl ester