(1R,3S,4aS,4bR,6R,8R,8aS,10S,10aR)-10-(tert-butyldimethylsilyloxy)-1-(2-hydroxyethyl)-1,4a,6-trimethyl-8-(triethylsilyloxy)tetradecahydrophenanthren-3-ol 在
hexaammonium heptamolybdate tetrahydrate 、
四丁基氯化铵 、
双氧水 、
potassium carbonate 作用下,
以
四氢呋喃 为溶剂,
以96%的产率得到(1R,4aS,4bR,6R,8R,8aS,10S,10aR)-10-(tert-butyldimethylsilyloxy)-1-(2-hydroxyethyl)-1,4a,6-trimethyl-8-(triethylsilyloxy)dodecahydrophenanthren-3(4bH)-one