1,2:3,4-二-O-异亚丙基-α-D-半乳糖-己二醛-1,5-吡喃糖 、
1-ethylphosphonate de diethyle 在
lithium diisopropyl amide 作用下,
生成 [(Z)-2-Methyl-3-((3aR,5R,5aS,8aS,8bR)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-yl)-acryloylamino]-acetic acid ethyl ester