Methanesulfonic acid (3S,5R,8S,9S,10R,13S,14S,16S,17R)-3-(tert-butyl-dimethyl-silanyloxy)-17-(1-hydroxy-ethyl)-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-16-yl ester 在
pyridiniumchlorochromate on aluminumoxide 作用下,
以
二氯甲烷 为溶剂,
反应 6.0h,
生成
Methanesulfonic acid (3S,5R,8S,9S,10R,13S,14S,16S,17S)-17-acetyl-3-(tert-butyl-dimethyl-silanyloxy)-4,4,8,10,14-pentamethyl-hexadecahydro-cyclopenta[a]phenanthren-16-yl ester