Assembly of α-Aryl Sulfones and Allyl Sulfones and Their Amide Analogues via Copper-Catalyzed Coupling Reactions.

A method is described for the synthesis of α-aryl and allylic sulfones and sulfonamides through CuBr/oxalamide-catalyzed coupling at 40 °C. This transformation involves coupling with (hetero)aryl or vinyl bromides and 2-substituted sulfonylacetates (or amide analogues), proceeding via spontaneous hydrolysis and decarboxylation. The conditions are compatible with various functional groups and heterocycles, allowing for the diverse syntheses of the target compounds.