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