乙酸酐 、
Acetic acid (3R,5R,9R,10S,13S,17S)-17-hydroxy-13-methyl-2,3,4,5,6,7,9,10,11,12,13,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 以
吡啶 为溶剂,
反应 24.0h,
以86%的产率得到Acetic acid (3R,5R,9R,10S,13S,17S)-3-acetoxy-13-methyl-2,3,4,5,6,7,9,10,11,12,13,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester