(8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl 2-(furan-3-yl(hydroxy)methyl)acrylate 在
oxygen 、 rose bengal 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以93%的产率得到(8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl 2-(hydroxy(2-hydroxy-5-oxo-2,5-dihydrofuran-3-yl)methyl)acrylate