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

preprint
submitted on 13.10.2020 and posted on 13.10.2020 by Haoyu Li, Xinxin Tang, Jia Hao Pang, Xiangyang Wu, Edwin K. L. Yeow, Jie Wu, Shunsuke Chiba
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.

Funding

Pharma Innovation Programme Singapore (A*STAR, SERC A19B3a0014)

History

Email Address of Submitting Author

shunsuke@ntu.edu.sg

Institution

Nanyang Technological Univertsity

Country

Singapore

ORCID For Submitting Author

0000-0003-2039-023X

Declaration of Conflict of Interest

The authors declare no competing interest.

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