((2S,4aS,4bR,7S,8S,8aR)-7-Acetoxy-8-acetoxymethyl-2,4b,8-trimethyl-1,2,3,4,4a,4b,5,6,7,8,8a,9-dodecahydro-phenanthren-2-yl)-acetic acid methyl ester 在
Eosin Y 、
氧气 作用下,
以
乙醇 为溶剂,
反应 24.0h,
以600 mg的产率得到((2R,4aR,4bR,7S,8S,8aR,10R)-7-Acetoxy-8-acetoxymethyl-10-hydroxy-2,4b,8-trimethyl-2,3,4,4a,4b,5,6,7,8,8a,9,10-dodecahydro-phenanthren-2-yl)-acetic acid methyl ester