Copper-catalysed intramolecular O-arylation: a simple and efficient method for benzoxazole synthesis
作者:Fengtian Wu、Jie Zhang、Qianbing Wei、Ping Liu、Jianwei Xie、Haojie Jiang、Bin Dai
DOI:10.1039/c4ob02068e
日期:——
An efficient protocol has been developed for the copper-catalysed intramolecular cyclization of N-(2-iodo-/bromo-/chloro-phenyl)benzamides for the synthesis of 2-substituted benzoxazoles.
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。