[(3S,8R,9S,10R,13S,14S)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-(17E)-ylidene]-fluoro-acetic acid ethyl ester 在
二异丁基氢化铝 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以57%的产率得到2-[(3S,8R,9S,10R,13S,14S)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-(17E)-ylidene]-2-fluoro-ethanol