Highly active Pd(II) catalysts with pyridylbenzoimidazole ligands for the Heck reaction
作者:Weixuan Chen、Chanjuan Xi、Yongwei Wu
DOI:10.1016/j.jorganchem.2007.07.006
日期:2007.9
The air-, and thermo-stable palladium(II) complexes C1–C10 are prepared by the reaction of PdCl2(CH3CN)2 with pyridylbenzoimidazole. With various substituents on the pyridine ring, palladium atom was coordinated by two pyridylbenzoimidazole molecules via nitrogen atoms of benzoimidazole. The structure of complexes C3, C4, C6, and C7 has been confirmed by X-ray diffraction analysis. Without substituents
空气和热稳定的钯(II)配合物C1 - C10是通过PdCl 2(CH 3 CN)2与吡啶基苯并咪唑的反应制备的。在吡啶环上具有各种取代基的情况下,钯原子由两个吡啶基苯并咪唑分子通过苯并咪唑的氮原子配位。配合物C3,C4,C6和C7的结构已经通过X射线衍射分析确认。如果没有在吡啶环上的取代基,钯原子直接与吡啶和苯并咪唑氮的两个氮原子配位经由分子内螯合(C10)。这些配合物在无膦条件下以良好或高收率进行了芳基溴的Heck烯化反应。