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The first photosensitizer‐free visible light‐driven, gold‐catalyzed C–C cross‐couplings of arylboronic acids and aryldiazonium salts are reported. The reactions can be conducted under very mild conditions, using a catalytic amount of tris(4‐trifluoromethyl)phosphinegold(I) chloride [(4‐CF 3 ‐C 6 H 4 ) 3 PAuCl] with methanol as the solvent allowing an alternative access to a variety of substituted biaryls in moderate to excellent yields with broad functional group tolerance. magnified image
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Witzel et al. (2017) studied this question.
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