咪唑盐二醋酸碘苯促进苯并咪唑类衍生物的水相合成

报道了一种简便高效的苯并咪唑类衍生物的水相合成新方法, 合成了兼具离子液体和二醋酸碘苯双重特点的咪唑盐二醋酸碘苯. 以水为溶剂, 在咪唑盐二醋酸碘苯促进下, 通过邻苯二胺或4-甲基邻苯二胺与各种芳醛室温氧化环合, 一步合成了13种苯并咪唑类衍生物, 反应时间25～45 min, 反应产率92％～98％. 用核磁共振、红外光谱、质谱和元素分析对产物的结构进行了表征, 提出了可能的反应机理. 该合成方法具有底物适用范围广、反应条件温和、反应速度快、反应产率高及氧化剂对应的还原产物可回收利用等优点, 是一种环境友好的绿色合成方法.

Synthesis of Benzimidazole Derivatives in Water Under Imidazolium Salt Grafted Iodobenzene Diacetate Assisted

We developed a simple and efficient method for the synthesis of benzimidazole derivatives in water.Imidazolium salt grafted iodobenzene diacetate containing double features of ionic liquid and iodobenzene diacetate was synthesized.Thirteen benzimidazole derivatives were synthesized by one-step oxidative cyclisation of 1,2-phenylenediamine or 4-methyl-1,2-phenylenediamine at room temperature and a series of aromatic aldehydes under imidazolium salt grafted iodobenzene diacetate assisted.The reactions were co...