Sodium sulfate supported synthesis of cationic cyclophanes using microwaves

Abstract

A facile microwave-assisted synthesis of a series of cationic cyclophanes, viz. benzimidazolophanes 3a–3f, benzotriazolophanes 3g–3j, through efficient double quaternization of the corresponding precyclophanes 1a–1j with appropriate dibromides 2a–2d in solid phase medium, is described.