1-((1S,2S,4aS,4bR,6R,8R,8aS,10S,10aS)-10-(tert-butyldimethylsilyloxy)-1-(2-hydroxyethyl)-3-methoxy-1,2,4a,6-tetramethyl-8-(triethylsilyloxy)-1,2,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-2-yl)ethanone 、
叔丁基二甲基氯硅烷 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以103.3 mg的产率得到1-((1S,2S,4aS,4bR,6R,8R,8aS,10S,10aS)-10-(tert-butyldimethylsilyloxy)-1-(2-(tert-butyldimethylsilyloxy)ethyl)-3-methoxy-1,2,4a,6-tetramethyl-8-(triethylsilyloxy)-1,2,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-2-yl)ethanone