2:1 deoxycholic acid-diethyl ketone complex 在
air 作用下,
以
solid 为溶剂,
反应 240.0h,
以8%的产率得到(R)-4-[(3R,5S,6S,8R,9S,10R,12S,13R,14S,17R)-6-(1-Ethyl-1-hydroxy-propyl)-3,12-dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-pentanoic acid