2-bromo-1-[(3R,5R,8S,9S,10R,13S,14S,17S)-3-hydroxy-10-(methoxymethyl)-3,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]ethanone 、
4-isopropoxy-1H-pyrazole 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
反应 4.0h,
以19%的产率得到1-[(3R,5R,8S,9S,10R,13S,14S,17S)-3-hydroxy-10-(methoxymethyl)-3,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2-(4-propan-2-yloxypyrazol-1-yl)ethanone