(24R)-6α,7α-dihydroxy-24-ethylcholest-4-en-3-one 在
potassium carbonate 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以39%的产率得到(8S,9S,10R,13R,14S,17R)-17-[(2R,5R)-5-ethyl-6-methylheptan-2-yl]-6-methoxy-10,13-dimethyl-2,4,5,6,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3,7-dione