Heterogeneous sequential N-arylation of N-heterocycles over copper anchored mesoporous silica catalyst

Abstract

N-Arylation reaction of N-heterocyclic compounds has been carried out in excellent yield using copper anchored SBA-15 catalyst. Sequential N-arylation reactions employing single catalyst under heterogeneous condition provides a straightforward access to a series of important arylazolium salts. Simplicity of the method and outstanding character of the catalyst facilitate the reactions to go smoothly which encompass a broad range of functional groups. Catalyst can be recovered and reused several times without any significant loss in its catalytic activity.