Acetic acid (2R,3S,5S,8S,9S,10R,13R,14S,17R)-3-acetoxy-17-((1R,4R)-4-ethyl-1,5-dimethyl-hexyl)-10,13-dimethyl-6-oxo-hexadecahydro-cyclopenta[a]phenanthren-2-yl ester 在
disodium hydrogenphosphate 、
三氟过氧乙酸 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以77%的产率得到Acetic acid (1R,3aS,3bS,6aS,8S,9R,10aR,10bS,12aR)-8-acetoxy-1-((1R,4R)-4-ethyl-1,5-dimethyl-hexyl)-10a,12a-dimethyl-6-oxo-hexadecahydro-5-oxa-benzo[3,4]cyclohepta[1,2-e]inden-9-yl ester