Domino Meyer-Schuster/Arylation Reaction of Alkynols or Alkynyl Hydroperoxides with Diazonium Salts Promoted by Visible Light under Dual Gold and Ruthenium Catalysis

A method for the arylative coupling of alkynols or alkynyl hydroperoxides using equimolar amounts of diazonium salts at room temperature has been achieved through application of a gold/photoredox dual catalytic system. The excess of external reagents (oxidant or base) and high temperatures required by previous arylative Meyer-Schuster rearrangement protocols are avoided by exploitation of a visible light-mediated process.Support for this work by MINECO and FEDER (Projects CTQ2012-33664-C02-01, CTQ2012-33664-C02-02, CTQ2015- 65060-C2-1-P, and CTQ2015-65060-C2-2-P) is gratefully acknowledged. E. B. thanks MINECO for a postdoctoral contractPeer Reviewe