(8S,11R,13S,14S,17S)-17-hydroxy-11-[4-((RS)-1-hydroxyethyl)phenyl]-13-methyl-17-pentafluoroethyl-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one 、
乙二醇 、
原甲酸三甲酯 在
对甲苯磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 48.0h,
以26%的产率得到(8S,11R,13S,14S,17S)-17-hydroxy-11-{4-[(1RS)-1-(2-hydroxyethoxy)ethyl]phenyl}-13-methyl-17-pentafluoroethyl-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydro-cyclopenta[a]phenanthren-3-one