methylphenyl sulfoxide and C–C coupling of various of aryl halides with alkenes. The reactions proceed in moderate to good yields. Interestingly, it is shown experimentally that, by using bulkier bidentate N‐heterocyclic carbene ligands, more selective catalytic systems towards cis products in Heck coupling reactions can be achieved.
使用1,3-双(N-杂环)碳烯
配体具有不同的烷基翼尖基(烷基=甲基,异丙基和叔丁基)是用于
钯催化的直接有效的方法小号甲基苯基砜和C-的-arylation各种芳基卤化物与烯烃的C偶联。反应以中等至良好的产率进行。有趣的是,实验表明,通过使用体积较大的双齿N-杂环卡宾
配体,可以实现对Heck偶联反应中顺式产物的更多选择性催化体系。