stereo-selectively the γ-product with trans-stereochemistry at the double bond. The trans-vinylsilanes are transformed stereoselectively to Z-vinyl iodides. Coupling of the vinyl iodides with organometallic reagents gives Z-alkenes. This approach has been applied to the synthesis of several insect sex pheromones.
三烷基甲
硅烷基烯丙基阴离子被烷基卤化物烷基化,从而在区域和区域选择性地在双键处具有反式立体
化学的γ-产物。将反式-
乙烯基硅烷立体选择性地转化为Z-
乙烯基碘。
乙烯基碘化物与有机
金属试剂的偶联产生Z-烯烃。该方法已应用于几种昆虫性信息素的合成。