phosphine-free mono- and double-Heck reaction of terminal olefins with electron-deficient and electron-rich aryl halides (iodides and bromides) is described. These reactions are catalyzed by the dicarbene dipalladium complex 1 by controlling the stoichiometry of the aryl halide and the olefine, the loading of the palladium catalyst, as well as using different base, and with or without additive. The procedure
描述了末端烯烃与缺电子和富电子的芳基卤化物(
碘化物和
溴化物)的无膦单-和双-Heck反应。通过控制芳基卤化物和烯烃的
化学计量,
钯催化剂的负载,以及使用不同的碱,有或没有添加剂,二碳二烯二
钯配合物1催化这些反应。双-Heck反应的方法允许末端烯烃的β,β-二芳基化和β,β′-二芳基化,并以良好或优异的产率提供三取代的烯烃。