[(4aS,6aR,12aR,12bS)]-(2H)-1,3,4,4a,5,6,6a,12,12a,12b-decahydro-4,4,6a,12b-tetramethylbenzo[a]xanthen-10-yl formate 在
苯亚硒酸酐 、
potassium carbonate 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 0.5h,
生成 [(4aS,6aR,12aR,12bS)]-(2H)-1,3,4,4a,5,6,6a,12,12a,12b-decahydro-4,4,6a,12b-tetramethylbenzo[a]xanthene-10,11-dione