Issue 17, 2019

Thiourea dioxide as a source of sulfonyl groups: photoredox generation of sulfones and sulfonamides from heteroaryl/aryl halides

Abstract

Thiourea dioxide as the source of sulfonyl groups for the efficient synthesis of heteroaryl sulfones and sulfonamides from heteroaryl halides under visible light irradiation is reported. This transformation proceeds smoothly via heteroaryl sulfinate intermediates, which can be trapped in situ by various electrophiles. A broad reaction scope is demonstrated, especially for the electron-deficient heteroaryl halides. Mechanistic studies show that the radical coupling of the heteroaryl radical and sulfur dioxide radical anion may be the key step during the reaction process, as supported by EPR spectroscopy and DFT calculations.

Graphical abstract: Thiourea dioxide as a source of sulfonyl groups: photoredox generation of sulfones and sulfonamides from heteroaryl/aryl halides

Supplementary files

Article information

Article type
Communication
Submitted
01 Jan 2019
Accepted
04 Feb 2019
First published
04 Feb 2019

Chem. Commun., 2019,55, 2489-2492

Thiourea dioxide as a source of sulfonyl groups: photoredox generation of sulfones and sulfonamides from heteroaryl/aryl halides

S. Ye, Y. Li, J. Wu and Z. Li, Chem. Commun., 2019, 55, 2489 DOI: 10.1039/C9CC00008A

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