Direct C(sp3)–H Sulfonylation of Xanthene Derivatives with Sodium Sulfinates by Oxidative Copper Catalysis

Abstract

Comprehensive SummaryBy employing a readily available CuCl/DDQ catalyst system, we herein report a direct C(sp3)–H sulfonylation of xanthene derivates with odorless sodium sulfinates. Various 9H‐xanthenes, thioxanthenes, and 9,10‐dihydroacridines are efficiently transformed into the desired benzylic sulfonyl products via a radical/radical cross‐coupling process, proceeding with the merits of broad substrate scope, operational simplicity, good functional group compatibility, and mild reaction conditions.