Magnetic Copper Ferrite Nanoparticles: An Inexpensive, Efficient, Recyclable Catalyst for the Synthesis of Substituted Benzoxazoles via Ullmann-Type Coupling under Ligand-Free Conditions
作者:Hua Wang、Daoshan Yang、Xiao Zhu、Wei Wei、Min Jiang、Ning Zhang、Dandan Ren、Jinmao You
DOI:10.1055/s-0033-1340599
日期:——
A new sustainable strategy for the synthesis of benzoxazoles from substituted N -(2-halophenyl)benzamides was developed in which inexpensive, readily available, air-stable, recyclable copper(II) ferrite serves as a nanocatalyst. The nanocatalyst can be completely recovered with an external magnet and can be used seven times without significant loss of catalytic activity.
开发了一种从取代的 N-(2-卤代苯基)苯甲酰胺合成苯并恶唑的新可持续策略,其中廉价、易得、空气稳定、可回收的铁酸铜 (II) 作为纳米催化剂。纳米催化剂可以通过外部磁铁完全回收,可以使用七次而催化活性没有显着损失。
Palladium-Catalyzed, <i>ortho</i>-Selective C–H Halogenation of Benzyl Nitriles, Aryl Weinreb Amides, and Anilides
作者:Riki Das、Manmohan Kapur
DOI:10.1021/acs.joc.6b02731
日期:2017.1.20
ortho-selective C–H halogenation methodology is reported herein. The highlight of the work is the highly selective C(sp2)–H functionalization of benzyl nitriles in the presence of activated C(sp3)–H bond, which results in good yields of the halogenated products with excellent regioselectivity. Along with benzyl nitriles, aryl Weinrebamides and anilides have been evaluated for the transformation using aprotic
Novel and efficient heterogeneous polymer supported copper catalyst for synthesis of 2-substituted Benzoxazoles from 2-Haloanilides
作者:Thachora Venu Saranya、Pambingal Rajan Sruthi、Veena Raj、Saithalavi Anas
DOI:10.1016/j.jorganchem.2021.121733
日期:2021.4
A novel polymer supported copper complex is prepared by the immobilization of copper iodide on chemically modified polyacrylonitrile and its application in heterogeneous catalysis is described. The catalyst was prepared by easy method via synthetic modification of Polyacrylonitrile (PAN) using ethylene diamine followed by the complexation with CuI. After characterization, this complex was explored