Mechanochemical synthesis of aromatic sulfonamides

A three-component Pd-catalysed aminosulfonylation reaction of K 2 S 2 O 5 and amine with aryl bromides or aromatic carboxylic acids was developed. This strategy was developed to utilise mechanical energy and accommodate primary as well as secondary aliphatic and aromatic amines to provide a new shortcut to a wide range of sulfonamides. Studies on the scope and limitations of the reaction indicated its tolerance of a vast range of functional groups and many structural patterns. The reactions were scaled up to gram quantities. New paths of entry to aromatic sulfonamides were developed using mechanochemical one-pot three-component synthetic protocols based on the Pd-catalyzed aminosulfonylation reaction of aryl bromides or aromatic carboxylic acids.