((S)-2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-(diethoxy-phosphoryl)-acetic acid ethyl ester 、
4-甲氧基苯甲醛 在
lithium diisopropyl amide 作用下,
生成 (Z)-2-((S)-2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-3-(4-methoxy-phenyl)-acrylic acid ethyl ester 、 (E)-2-((S)-2-tert-Butoxycarbonylamino-3-methyl-pentanoylamino)-3-(4-methoxy-phenyl)-acrylic acid ethyl ester