(1R,3R,4aS,4bR,6R,8R,8aS,10S,10aS)-8-acetoxy-10-hydroxy-1,4a,6-trimethyltetradecahydrophenanthrene-1,3-carbolactone 、
叔丁基二甲硅基三氟甲磺酸酯 在
2,6-二甲基吡啶 作用下,
以
二氯甲烷 为溶剂,
以1.48 g的产率得到(1R,3R,4aS,4bR,6R,8R,8aS,10S,10aS)-8-acetoxy-10-(tert-butyldimethylsilyloxy)-1,4a,6-trimethyltetradecahydrophenanthrene-1,3-carbolactone