(3S,5S,8R,9S,10S,13S,14S,17S)-10,13-Dimethyl-17-triethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-3-ol 在
2,2,6,6-tetramethyl-piperidine-N-oxyl 、 polymer-bound NMe
3(1+)*Br(OAc)2
(1-) 作用下,
以
二氯甲烷 为溶剂,
反应 6.0h,
以100%的产率得到(5S,8R,9S,10S,13S,14S,17S)-10,13-Dimethyl-17-triethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-3-one