A mild and fully catalytic aryl-aryl cross coupling via gold-catalysed C-H activation has been achieved by merging gold and photoredox catalysis. The procedure is free of stoichiometric oxidants and additives, which were previously required in gold-catalysed C-H activation reactions. Exploiting dual gold and photoredox catalysis confers regioselectivity via the crucial gold-catalysed C-H activation step, which is not present in the unselective photocatalysis-only counterpart.
Gauchot, V., Sutherland, D., & Lee, A-L. (2017). Dual Gold and Photoredox Catalysed C-H Activation of Arenes for Aryl-Aryl Cross Couplings. Chemical Science, 8(4), 2885-2889. https://doi.org/10.1039/C6SC05469B