乙酸酐 、
(3S,5S,8R,9S,10S,13S,14S,17S)-3-Benzyloxy-17-(2-methoxy-ethoxymethoxy)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthrene 在
三氯化铁 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 18.0h,
以30%的产率得到Acetic acid (3S,5S,8R,9S,10S,13S,14S,17S)-3-benzyloxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yloxymethyl ester