Direct C–H Arylation of Heteroarenes with Copper Impregnated on Magnetite as a Reusable Catalyst: Evidence for CuO Nanoparticle Catalysis in Solution
作者:Suhelen Vásquez-Céspedes、Kathryn M. Chepiga、Nadja Möller、Andreas H. Schäfer、Frank Glorius
DOI:10.1021/acscatal.6b01288
日期:2016.9.2
operationally simple reaction conditions good yields and selectivities were obtained using diaryliodonium salts as coupling partners. A combination of experimental methods including kinetic studies, filtration tests, and a series of analytical tools (TXRF, ICP-MS, SEM, XPS, TEM, EFTEM) provide evidence for catalytically active soluble nanoparticles formed from an amorphous heterogeneous precursor. Mechanistic
可重复使用的铜基催化剂体系用于富电子杂芳烃的直接芳基化。在温和且操作简单的反应条件下,使用二芳基碘鎓盐作为偶联伙伴可获得良好的收率和选择性。包括动力学研究,过滤测试和一系列分析工具(TXRF,ICP-MS,SEM,XPS,TEM,EFTEM)在内的实验方法的结合为由无定形异质前体形成的具有催化活性的可溶性纳米颗粒提供了证据。机理研究表明,氧化还原中性过程会促进氧化铜(II)物种从二芳基碘鎓盐中解离平衡离子。