Metal-Free Oxidative C(sp3)–N Coupling by HBr and DMSO: A Novel Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones
作者:Parviz Ranjbar、Narjes Rezaei、Ehsan Sheikhi
DOI:10.1055/s-0036-1591544
日期:2018.4
A metal-free oxidative C(sp3)–N coupling process has been developed for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones. The reaction between primary amines, isatoic anhydride, and benzylic alcohols in the presence of HBr in DMSO at 80 °C affords 2,3-dihydroquinazolin-4(1H)-ones in excellent yields. Under these reaction conditions, benzylic alcohols react with in situ generated bromodimethylsulfonium
An Efficient One-Pot Synthesis of 2,3-dihydroquinazolin-4(1H)-ones in Green Media
作者:Mohammad Ali Bodaghi Fard、Akbar Mobinikhaledi、Mahdia Hamidinasab
DOI:10.1080/15533174.2013.776605
日期:2014.4.21
A series of mono- and disubstituted 2,3-dihydroquinazoline-4(1H)-ones have been synthesized in good yields by one-pot reaction using isatoic anhydride, ammonium acetate or amines and aldehydes in green and mild reaction conditions. The effects of various parameters such as the solvent, catalyst amount, reaction time, and temperature were examined. The protocol is simple, efficient, and environmentally benign and the catalyst can be recovered and reused without evident loss of reactivity.
Cu(II) complex-decorated hybrid nanomaterial: a retrievable catalyst for green synthesis of 2,3-dihydroquinazolin-4(1<i>H</i>)-ones
作者:Mohammad Ali Bodaghifard、Somayeh Safari
DOI:10.1080/00958972.2021.1905803
日期:2021.5.19
Abstract The significant stability of magnetic core and − OH functional groups on the surface of silica-coated cobalt ferrite (CoFe2O4@SiO2) nanoparticles make it a good candidate for functionalization and catalytic application. In this work, a surface-modified magnetic solid support with Cu(II) complex was prepared. The structure of the new nanostructure was characterized by Fourier-transform infrared
摘要 二氧化硅包覆的铁氧体钴(CoFe 2 O 4 @SiO 2)表面的磁芯和-OH官能团的显着稳定性) 纳米粒子使其成为功能化和催化应用的良好候选者。在这项工作中,制备了具有 Cu(II) 配合物的表面改性磁性固体载体。通过傅里叶变换红外光谱(FT-IR)、X射线粉末衍射(XRD)、热重分析(TGA/DTG)、振动样品磁强计(VSM)、场发射扫描电子显微镜对新型纳米结构进行了表征(FE-SEM)、电子色散 X 射线光谱 (EDS) 和电感耦合等离子体发射光谱 (ICP/OES) 技术。制备的杂化纳米材料在合成 2,3-二氢喹唑啉-4(1 H)-ones 和所需产物的高产率是用绿色培养基获得的。该方法的一些优点是收率高、反应时间短、绿色溶剂和条件、后处理程序简单、铜浸出可忽略不计、可重复使用且催化效率没有显着降低以及通过使用外部磁铁简单分离纳米催化剂以及环境兼容性和可持续性.