O-ethyl S-(2-((8S,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-3,11-dioxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl) carbonodithioate 、
2-((2-ethoxy-5,9-dimethyldeca-1,8-dien-3-yl)oxy)-6-fluoropyridine 在
过氧化双月桂酰 、
silica gel 作用下,
以
乙酸乙酯 为溶剂,
反应 1.0h,
以56%的产率得到(8S,9S,10R,13S,14S,17R)-17-(7,11-dimethyl-4-oxododec-10-enoyl)-17-hydroxy-10,13-dimethyl-7,8,9,10,12,13,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthrene-3,11(2H,6H)-dione