(3S,8S,9S,10R,13S,14S,16R,17R)-17-[(2S,3R)-3-hydroxy-6-methylheptan-2-yl]-10,13-dimethyl-3-(oxan-2-yloxy)-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-16-ol 、
硫代氯甲酸苯酯 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
以48%的产率得到(3R,8R,9R,10S,13R,14R,16R,17R)-16-(2-benzylallyl)-17-((2R,3S)-3-(2-benzylallyl)-6-methylheptan-2-yl)-3-(cyclohexylmethyl)-8,9,10,13,14,17-hexamethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene