Cu‐Catalyzed C(sp²)−H Bond Aminosulfonylation of Maleimides

Abstract

A copper‐catalyzed direct C(sp2)−H bond aminosulfonylation of maleimides is demonstrated. This protocol enables concurrent construction of C(sp2)−N and C(sp2)−SO2 bonds in one‐step and features high efficiency, broad substrate scopes, good functional‐group tolerance, and mild reaction conditions. Preliminary mechanistic studies indicate that the reaction probably involves a radical way. Significantly, this method is applicable to synthesize derivatives of pharmaceuticals such as Desloratadine, Fluoxetine, Atomoxetine, and Maprotiline.