(7S,13S)-7-(2-hydroxyethyl)-3-methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-ol 、
对甲苯磺酰氯 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以95%的产率得到2-((7S,8R,9S,13S,14S,17S)-17-hydroxy-3-methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)ethyl 4-methylbenzenesulfonate