甲基锂 、 (3aR,4aS,8aS,9aS)-6-[1-Hydroxy-meth-(E)-ylidene]-2,2,4a,9,9-pentamethyl-octahydro-naphtho[2,3-d][1,3]dioxol-5-one 在
三乙胺 作用下,
以
乙醚 为溶剂,
以70%的产率得到(3aR,4aS,8aS,9aS)-6-[1-(tert-Butyl-dimethyl-silanyloxy)-meth-(E)-ylidene]-2,2,4a,5,9,9-hexamethyl-decahydro-naphtho[2,3-d][1,3]dioxol-5-ol