(R)-1-[(7R,13S,14S,17S)-17-(tert-Butyl-dimethyl-silanyloxy)-3-methoxy-13-methyl-7,11,12,13,14,15,16,17-octahydro-6H-cyclopenta[a]phenanthren-7-yl]-prop-2-en-1-ol 在
18-冠醚-6 、 potassium hydride 作用下,
以
四氢呋喃 为溶剂,
反应 2.0h,
以83%的产率得到3-[(9R,13S,14S,17S)-17-[tert-butyl(dimethyl)silyl]oxy-3-methoxy-13-methyl-11,12,14,15,16,17-hexahydro-6H-cyclopenta[a]phenanthren-9-yl]propanal