Gold and Bismuth Trimetallic Synergistic Redox Catalysis for Non-Directed C─H Arylation with Aryl Bismuth.

The influence of substituent effects plays an important role on the efficiency and regioselectivity toward C─H activation of non-directed arenes. Here, an unprecedented trimetallic synergistic redox catalysis system has been developed to achieve a highly efficient and orthogonal C─H arylation of non-directed arenes with aryl bismuth. Both electron-rich and -deficient aryl bismuth can proceed C─H arylation readily, thus affording an elegant strategy for the synthesis of challenging electron-rich and sterically hindered biaryls by means of gold catalysis.