Metal-free O–H/C–H difunctionalization of phenols by o-hydroxyarylsulfonium salts in water†
Abstract
An environmentally benign method for C–H/O–H difunctionalization of phenols with sulfoxides under mild conditions has been developed. The reaction process is mediated by an electrophilic aromatic substitution and subsequent selective aryl or alkyl migration, involving C–S and C–O bond formations with broad substrate scope.