One-Pot Protocol for the Synthesis of Imidazoles and Quinoxalines using<i>N</i>-Bromosuccinimide
作者:Sachin D. Pardeshi、Pratima A. Sathe、Kamlesh S. Vadagaonkar、Atul C. Chaskar
DOI:10.1002/adsc.201700900
日期:2017.12.11
N‐bromosuccinimide (NBS)‐mediated one‐pot, green, efficient and practical synthesis of substituted imidazoles and quinoxalines has been achieved by the reaction of styrenes with N‐arylbenzamidines and o‐phenylenediamines, respectively, in a water:1,4‐dioxane mixture. The reaction involves formation of an α‐bromo ketone as an intermediate in the presence of NBS and water, followed by condensation with
N-溴代琥珀酰亚胺(NBS)介导的苯乙烯,N-芳基苯甲m和邻苯二胺的单锅,绿色,高效,实用合成取代咪唑和喹喔啉已在水中:1,4-二恶烷混合物。该反应包括在NBS和水存在下形成α-溴代酮作为中间体,然后与N-芳基苯甲m和邻苯二酚缩合。苯二胺。使用廉价的NBS作为溴源以及氧化剂,水作为溶剂和易于获得的起始原料,可以使该方案在环境上无害且在经济上可行。得到的咪唑和喹喔啉取代基的收率好至极好,并具有广泛的官能团相容性。