Polysulfide Anions as Visible Light Photoredox Catalysts for Aryl Cross-Couplings

13 October 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Herein, we disclose the use of polysulfide anions as visible light photoredox catalysts for aryl cross-coupling reactions. The reaction design enables single-electron-reduction of aryl halides upon photo-excitation of tetrasulfide dianions (S42–). The resulting aryl radicals are engaged in (hetero)biaryl cross-coupling, borylation, and hydrogenation in a redox catalytic regime involving S4•–/S42– and S3•–/S32– redox couples.


polysulfide anions
visible light
Aryl radicals
cross coupling
continuous flow
photoredox catalysis

Supplementary materials

ChemRxiv SI Chiba


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