Treatment of benzoin with an aldehyde and NH4OAc in polyethylene glycol (PEG-400) under reflux afforded a 5-substituted 2,3-diphenyl imidazole while the same reaction along with an additional aniline produced 5-substituted 1-aryl 2,3-diphenyl imidazole. No any catalyst or solvent was required to carry out this conversion, and the imidazoles were formed in excellent yields.
在回流条件下,在聚
乙二醇 (P
EG-400) 中用醛和 NH4OAc 处理
安息香得到 5-取代的 2,3-二苯基
咪唑,而相同的反应与额外的
苯胺一起生成 5-取代的 1-芳基 2,3-二苯基
咪唑。进行这种转化不需要任何催化剂或溶剂,并且以极好的收率形成
咪唑。