(1R,4aR,7S,8aS,10aS)-1,4a,7-Trimethyl-7-vinyl-1,2,3,4,4a,6,7,8,8a,9,10,10a-dodecahydro-phenanthrene-1-carboxylic acid 2-trimethylsilanyl-ethyl ester 在
dimethyl sulfide borane 作用下,
以
四氢呋喃 、
吡啶 为溶剂,
生成
(1R,4aR,7S,8aS,10aS)-7-(2-Acetoxy-ethyl)-1,4a,7-trimethyl-1,2,3,4,4a,6,7,8,8a,9,10,10a-dodecahydro-phenanthrene-1-carboxylic acid 2-trimethylsilanyl-ethyl ester