We report the first use of a nickel catalyst for the direct arylation of a β-difunctionalized compound, the malononitrile, from halogenated aromatic substrates. The catalytic system is quite simple: Ni(PPh3)3, generated in situ from NiBr2(PPh3)2, PPh3 and zinc. Good yields and excellent selectivities have been obtained in α-arylmalononitriles from iodobenzene, but also from bromo- or chloro-aromatic
我们报道了
镍催化剂首次用于从卤代芳族底物中直接芳基化β-双官能化化合物
丙二腈。催化体系非常简单:Ni(PPh 3)3是由NiBr 2(PPh 3)2,PPh 3和
锌原位生成的。在α-芳基
丙二腈中,从
碘苯,也从
溴或
氯代芳族底物获得了良好的收率和优异的选择性。