A polymer onium acting as phase-transfer catalyst in halogen-exchange fluorination promoted by microwave

摘要

A polymerized quaternary ammonium salt polydiallyldimethylammonium chloride,exhibiting high stability to heat and base,was prepared and applied as phase-transfer catalyst (PTC)in halogen-exchange (Halex)fluorination of chloronitrobenzenes to give excellent yields of corresponding fluoronitrobenzenes.Dimethyl sulfoxide was found to be the best solvent when microwave was applied as heating resource.