Clean synthesis of azo compounds using Magtrieve in the ionic liquid[bmim][Br]

摘要

A series of azo compounds,N-aryl-2-phenyl-diazenecarboxamides,and 4-substituted-1,2,4-triazo-line-3,5-diones,were synthesized using Magtrieve?,a magnetically retrievable and recyclable oxidant,in the ionic liquid[bmim][Br]under neutral condition.This procedure has several advantages,such as greenness,mild reactions,simple manipulation,and reusability of reagent and solvent.