N-苯基双(三氟甲烷磺酰)亚胺 、 (3R,5S,8R,9R,10S,13S,14S)-3-(dimethylamino)-13-methyl-2,3,4,5,6,7,8,9,10,11,12,14,15,16-tetradecahydro-1H-cyclopenta[a]phenanthren-17-one 在
双(三甲基硅烷基)氨基钾 、
水 作用下,
以
四氢呋喃 为溶剂,
反应 10.5h,
以75%的产率得到[(3R,5S,8R,9R,10S,13S,14S)-3-(dimethylamino)-13-methyl-1,2,3,4,5,6,7,8,9,10,11,12,14,15-tetradecahydrocyclopenta[a]phenanthren-17-yl] trifluoromethanesulfonate