trifluoromethanesulfonic acid 17-(1,5-dimethyl-hexyl)-10,13-dimethyl-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 、
(2-tert-butoxy-2-oxoethyl)zinc(II) bromide 在
bis-triphenylphosphine-palladium(II) chloride 、
二异丁基氢化铝 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
以60%的产率得到[(8R,9S,10S,13R,14S,17R)-17-((R)-1,5-Dimethyl-hexyl)-10,13-dimethyl-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl]-acetic acid tert-butyl ester