Efficient multicomponent synthesis of 1,2,3-triazoles catalyzed by Cu(II) supported on PEI@Fe$_{3}$O$_{4}$ MNPs in a water/PEG$_{300}$ system
作者:Zeinab HASANPOUR、Aziz MALEKI、Morteza HOSSEINI、Lena GORGANNEZHAD、Vajihe NEJADSHAFIEE、Ali RAMAZANI、Ismaeil HARIRIAN、Abbas SHAFIEE、Mehdi KHOOBI
DOI:10.3906/kim-1607-40
日期:——
A highly dispersible and magnetically recoverable Cu-PEI@Fe$_3}$O$_4}$ MNPs catalyst was prepared and successfully applied in one-pot three-component coupling of terminal alkynes, sodium azide, and alkyl bromides/chlorides in water to give 1,4-disubstituted 1,2,3-triazoles with good to excellent yields. The catalyst was fully characterized with FT-IR, TGA, TEM, SEM, VSM, EDX, cyclic voltammetry,
制备了高度分散且可磁回收的Cu-PEI @ Fe $ _ 3} $ O $ _ 4} $ MNPs催化剂,并将其成功应用于末端炔烃,叠氮化钠和烷基溴的一锅三组分偶联/氯化物在水中生成1,4-二取代的1,2,3-三唑类化合物,收率好至极好。通过FT-IR,TGA,TEM,SEM,VSM,EDX,循环伏安法和ICP-AES光谱技术对催化剂进行了全面表征。此外,该催化剂易于被外磁体再循环并成功地在反应中重复使用了六次,而没有明显丧失其催化活性和铜的浸出。即使在水性介质中甚至有0.1 mol%的催化剂,也可以在不存在任何碱和还原剂的情况下进行大规模反应,因此该方案非常适合实际应用。