Palladium versus copper-catalyzed N-arylation towards an efficient access to polysubstituted dibenzophenanthrolines and carbazoles
作者:Clémence Jacquelin、Nicolas Saettel、Candide Hounsou、Marie-Paule Teulade-Fichou
DOI:10.1016/j.tetlet.2005.02.079
日期:2005.4
The double amination of meta-diiodo and dibromobenzenes by anthranilic acid derivatives is described using palladium and/or copper catalysis. The resulting symmetrical and unsymmetrical phenylene diamines are key precursors to polyfunctional dibenzophenanthroline carboxaldehydes. In contrast, when ortho-dibromo benzene is used as substrate, the Pd-mediated process affords exclusively the functional
描述了使用钯和/或铜催化的邻氨基苯甲酸衍生物对间二碘代和二溴代苯的双胺化。所得的对称和不对称亚苯基二胺是多官能二苯并菲咯啉羧酸醛的关键前体。相反,当使用邻二溴苯作为底物时,Pd介导的过程仅提供功能性咔唑。