Here, we demonstrate that merging photoredox catalysis with Lewis acid catalysis provides a fundamentally new activation mode of C–C triple bonds, to achieve the bond-forming reaction of alkynes with weak nucleophiles. Using a synergistic merger of Eosin Y and Cu(OTf)2, a highly efficient cyclization reaction of arene-ynes was developed.
R. Jin, Y. Chen, W. Liu, D. Xu, Y. Li, A. Ding and H. Guo, Chem. Commun., 2016, 52, 9909 DOI: 10.1039/C6CC03725A
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