Pd/NHC-catalyzed Arylsulfonylation of Boronic Acids: A General and Direct Protocol to Access Diarylsulfones
Tetrahedron letters(2021)
Abstract
For the first time, robust NHC-Pd complexes have been demonstrated as highly efficient catalysts in the direct arylsulfonylation of boronic acids. Remarkably, a broad number of diaryliodonium salts as powerful electrophilic arylation reagents are well compatible to form functional ortho-substituted diarylsulfones in satisfactory yields. Owing to the stronger sigma-donor and weaker pi-acceptor properties, the acenaphthoimidazolylidene ligands exhibit higher catalytic activities towards this challenging one-step arylsulfonylation reaction. (C) 2020 Elsevier Ltd. All rights reserved.
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Key words
Sulfones,NHC-Pd complexes,Three-component coupling,Arylsulfonylation
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