and photobiology. However, their applications in photocatalysis are yet to be explored. We report here that sunlight along with 1 mol% cercosporin, which is one of the perylenequinonoid pigments, catalyzes the direct C–H bond arylation of (het)arenes by a photoredox process with good regioselectivity and broad functional group compatibility. Furthermore, a gram-scale reaction with great conversions
The photoreactions of a number of biphenyl derivatives, in particular nitrobiphenyl derivatives, with cyanideion have been investigated. Photosubstitution by cyanideion has been found to predominate; photoreduction is not observed. In some cases (4-nitrobiphenyl, 4,4′-dinitrobiphenyl, 3-nitrobiphenyl and similar compounds) the behaviour can be rationalized on the basis of analogy to the pattern of
Dual gold and photoredox catalysed C–H activation of arenes for aryl–aryl cross couplings
作者:V. Gauchot、D. R. Sutherland、A.-L. Lee
DOI:10.1039/c6sc05469b
日期:——
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