Sulfonamides, especially primary aryl sulfonamides are very important scaffolds not only because of the wide applications as pharmacophores in drugs, but also the derivatization for other sulfonamides and different sulfur-containing compounds. Among the aryl sulfonamides, most syntheses of electron-rich (hetero)aryl sulfonamides are still severely limited by the classic chlorosulfonation or oxidative chlorination reactions with significant drawbacks. In this work, by the proposed and unique tert-butyl sulfonylcarbamate intermediate generated in situ from easily accessed tert-butyl chlorosulfonylcarbamate and diisopropylethylamine, a catalyst-free, mild and very pratical aminosulfonylation protocol for a wide scope of electron-rich (hetero)arene substrates with good to excellent yields was reported.

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