(E)-(3S,4R,7R)-7-((3bS,6R,8aS,8bS,10aR)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-4-methyl-oct-5-en-1-yn-3-ol 在
咪唑 、
正丁基锂 作用下,
生成
(E)-(4S,5R,8R)-4-(tert-Butyl-dimethyl-silanyloxy)-8-((3bS,6R,8aS,8bS,10aR)-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-5-methyl-non-6-en-2-ynoic acid isopropyl ester