Copper(I)-catalyzed N-arylation of imidazole with iodobenzene, its derivatives, and bromobenzene in poly(ethylene glycol) under microwave irradiation was studied. The influence of the following factors on the yield of arylation product was investigated: the nature of the source of copper and ligand, type of poly(ethylene glycol) (PEG) used, and substituents in iodoarene. An optimal catalytic system was selected:
研究了
铜 (I) 催化
咪唑与
碘苯、其衍
生物和
溴苯在微波辐射下在聚
乙二醇中的 N-芳基化。研究了以下因素对芳基化产物产率的影响:
铜源和
配体的性质、所用聚
乙二醇 (P
EG) 的类型以及
碘芳烃中的取代基。选择了最佳催化体系:CuO/l-Hys/Cs2CO3/P
EG-400,证明了含
铜催化剂循环利用的可能性。研究了使用
Cu2O/Cs2CO3/P
EG-400 催化和微波辐射对八种天然
氨基酸进行 N-芳基化,发现了反应结果对温度、过程持续时间和起始试剂比例的依赖性。在亮
氨酸、缬
氨酸、