N-<2-(N-t-Butoxycarbonyl-(S)-isoleucylamino)-2-(dimethoxyphosphinyl)-acetyl>-glycine methyl ester 、
4-甲氧基苯甲醛 在
potassium tert-butylate 作用下,
生成 [(Z)-2-((S)-2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-3-(4-methoxy-phenyl)-acryloylamino]-acetic acid methyl ester 、 [(E)-2-((S)-2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-3-(4-methoxy-phenyl)-acryloylamino]-acetic acid methyl ester