(R)-5-{(R)-4-[2-[(3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-2-oxo-hexanoic acid methyl ester 在
二乙胺基三氟化硫 作用下,
以
二氯甲烷 为溶剂,
以67%的产率得到(R)-5-{(R)-4-[2-[(3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-2,2-difluoro-hexanoic acid methyl ester