Reusable Gold(I) Catalysts with Unique Regioselectivity for Intermolecular Hydroamination of Alkynes
作者:Antonio Leyva、Avelino Corma
DOI:10.1002/adsc.200900491
日期:2009.11
Two gold(I) phosphine complexes bearing the low-coordinating bis(trifluoromethanesulfonyl)imidate ligand, namely AuSPhosNTf2 and AuPPh3NTf2, are active catalysts for the regioselective intermolecular hydroamination of both internal and terminal alkynes under mild reaction conditions. The catalysts show a regioselectivity based on electronic rather than steric factors, which allow the preferential synthesis
带有低配位双(三氟甲磺酰基)亚氨酸酯配体的两个金(I)膦配合物,即AuSPhosNTf 2和AuPPh 3 NTf 2是在温和的反应条件下内部和末端炔烃区域选择性分子间加氢胺化的活性催化剂。所述催化剂显示基于电子而非空间因素的区域选择性,这允许优先合成与先前描述的区域异构体相反的区域异构体。这种微妙的化学和区域选择性取决于所用的催化剂,底物和反应条件,并允许人们进行新的串联反应。这些金(I)配合物在自由溶剂条件下运行,不排除空气,不添加酸性助催化剂,可以通过在己烷中的简单沉淀进行定量回收和再利用。