1-甲氧基环己烯 、
3β-acetoxy-17β-pivaloylandrost-5-ene-19-ol 在
对甲苯磺酸 作用下,
以
1,4-二氧六环 为溶剂,
以100%的产率得到2,2-Dimethyl-propionic acid (3S,8R,9S,10S,13S,14S,17S)-3-acetoxy-10-(1-methoxy-cyclohexyloxymethyl)-13-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester