4.7 Article

Copper(I)-Catalyzed Cross-Coupling of Arylsulfonyl Radicals with Diazo Compounds: Assembly of Arylsulfones

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JOURNAL OF ORGANIC CHEMISTRY
卷 87, 期 18, 页码 12265-12273

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AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.2c01443

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  1. Scienti fi c Research Fund of Hunan Provincial Education Department [21B0262]
  2. Natural Science Foundation of Hunan Province [2022JJ40857]

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A copper-catalyzed cross-coupling reaction between arylsulfonyl radicals and diazo compounds has been developed for the synthesis of various arylsulfones under mild conditions. The reaction utilizes inexpensive and readily available K2S2O5 as the sulfur dioxide source to generate arylsulfonyl radicals. A radical mechanism involving the insertion of sulfur dioxide with aryl radicals followed by the coupling of arylsulfonyl radicals with copper carbenes is proposed.
A novel copper-catalyzed cross-coupling of arylsul-fonyl radicals with diazo compounds is described for the synthesis of various arylsulfones under mild conditions. In this reaction, the cheap, environmentally friendly, and readily available inorganic K2S2O5 is employed as the sulfur dioxide source for providing arylsulfonyl radicals. In addition, a radical mechanism involving the insertion of sulfur dioxide with aryl radicals followed by the coupling of arylsulfonyl radicals with copper carbenes is proposed.

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