(2R,3R,5S,8R,9S,10S,13R,14S,17R)-3-(3,3-Dimethyl-but-1-ynyl)-17-((R)-1,5-dimethyl-hexyl)-10,13-dimethyl-hexadecahydro-20-oxa-cyclopropa[2,3]cyclopenta[a]phenanthrene 在
Ameisensaeure 作用下,
反应 1.0h,
以20%的产率得到(5S,8R,9S,10S,13R,14S,17R)-3-(3,3-Dimethyl-butyryl)-17-((R)-1,5-dimethyl-hexyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-2-one