3(R)-but-2-enyl-5(S)-[5-tert-butyl-diphenylsilyloxy-1(S)-tert-butoxycarbonylamino-3,3-dimethyl-pentyl]-2-oxo-tetrahydrofuran 、 2(R)-but-2-enyl-9-tert-butyldiphenylsilyloxy-5(S)-tert-butoxycarbonylamino-4(S)-hydroxy-7,7-dimethyl-nonanoic acid (N-butyl)amide 生成
3-[N-tert-butoxycarbonyl-4(S)-(4-tert-butyl-diphenylsilyloxy-2,2-dimethylbutyl)-2,2-dimethyl-1,3-oxazolidin-5(S)-yl]-2(R)-but-2-enyl-propionic acid (N-butyl)amide