N-苯基双(三氟甲烷磺酰)亚胺 、 (3R,5S,8R,9S,10S,13S,14S)-3-(methoxymethoxy)-10,13-dimethylHexadecahydro- 17H-cyclopenta[a]phenanthren-17-one 在
双(三甲基硅烷基)氨基钾 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
以97%的产率得到(3R,5S,8R,9S,10S,13S,14S)-3-(methoxymethoxy)-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl trifluoromethanesulfonate