Magnetic nanoparticles supported cinchona alkaloids for asymmetric Michael addition reaction of 1,3-dicarbonyls and maleimides
作者:Shi-Xuan Cao、Jia-Xi Wang、Zheng-Jie He
DOI:10.1016/j.cclet.2017.06.022
日期:2018.1
Abstract Magnetic nanoparticles Fe3O4@SiO2 supported cinchona alkaloids (quinine and quinidine) were successfully synthesized as magnetically recoverable organocatalysts and characterized by FT-IR, XPS, SEM measurements, and elemental analysis. Their catalytic activity and stereoselectivity were preliminarily evaluated in the asymmetric Michael addition reaction of 1,3-dicarbonyls and maleimides. The
摘要磁性纳米颗粒Fe3O4 @ SiO2负载的金鸡纳生物碱(奎宁和奎尼丁)已成功合成为可磁回收的有机催化剂,并通过FT-IR,XPS,SEM和元素分析对其进行了表征。在1,3-二羰基和马来酰亚胺的不对称迈克尔加成反应中初步评估了它们的催化活性和立体选择性。负载的奎宁催化剂表现出良好的催化效率和中等至高的对映选择性。还检查了催化剂的磁回收率和再循环性。