iodomanganese(1+),2-methylprop-1-ene 、 Formic acid (3R,5S,7S,10S,13R,17R)-17-((R)-3-chlorocarbonyl-1-methyl-propyl)-7-formyloxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 以
乙醚 、
二氯甲烷 为溶剂,
以78.5%的产率得到Formic acid (3R,5S,7S,10S,13R,17R)-17-((R)-1,6-dimethyl-4-oxo-hept-5-enyl)-7-formyloxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester