Acetic acid (3S,4R,5R,7S,8S,9S,10R,13R,14S,17R)-7-bromo-17-((R)-1,5-dimethyl-hexyl)-5-hydroxy-4,10,13-trimethyl-6-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 在
lithium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 0.25h,
以58%的产率得到Acetic acid (3S,4R,5R,9S,10R,13R,14R,17R)-17-((R)-1,5-dimethyl-hexyl)-5-hydroxy-4,10,13-trimethyl-6-oxo-2,3,4,5,6,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester