(4S,5S,8S,9S,10R,13S,14S,17R)-4-Benzoyl-17-[2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-one 在
lithium tetrafluoroborate 作用下,
以
二氯甲烷 、
乙腈 为溶剂,
以86%的产率得到(4S,5S,8S,9S,10R,13S,14S,17R)-4-Benzoyl-17-(2-hydroxy-1-methyl-ethyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-one