【摘要】 通过连续反应,合并操作等途径对 Masai-Rausch 反应进行了改进,提高了烯烃收率,并扩大了合成的适用范围,使其成为某些专一几何构型三芳基乙烯的合成方法之一.用改进方法合成了一些立体专一性的三芳基乙烯,收率一般为50～70％.产物除经常规分析外,还通过钛环中间体的分离与分析、比较烯烃异构化前后的波谱变化、烯烃氧化产物的制备以及反应历程分析,确定了它们的结构.更多还原

【Abstract】 The Masai-Rausch method for the synthesis of triaryl ethylene was improved bycarrying out the reaction in a continuous manner or in“onepot operation”.The procedureis more versatile and the stereospecifity of theproducts remains good.The improvedmethod gave an overall yield of 50～70%.All substituted alkenes have been identifiedby routine analysis,their structures were determined by NMR and IR spectral methods.The isomerized cis-trans triarylethylenes were compared with the known compoundsby spectral methods as well as by oxidative degradation.A tentative reaction mechanismis suggested.更多还原