The acidic ionic liquid [BSO<sub>3</sub>HMIm]HSO<sub>4</sub>: a novel and efficient catalyst for one-pot, three-component syntheses of substituted pyrroles
作者:Yuan Luo、Bao-Qiang Zhang、Yan-Hong He、Zhi Guan
DOI:10.1515/znb-2014-0108
日期:2015.1.1
was used as an efficient catalyst for the synthesis of a variety of pyrrole derivativesvia a one-pot, three-component condensation of amines, nitroolefins, and 1,3-dicarbonylcompounds. Good to excellent yields of 72–96% were obtained under reflux in ethanol. The catalyst could easily be recovered and recycled up to six times, resulting in good yields without prolonging the reaction time. This method
An efficient and recyclable nanocatalyst for the green and rapid synthesis of biologically active polysubstituted pyrroles and 1,2,4,5-tetrasubstituted imidazole derivatives
作者:Myo Thwin、Boshra Mahmoudi、Olga A. Ivaschuk、Qahtan A. Yousif
DOI:10.1039/c9ra02325a
日期:——
for the green and rapid synthesis of biologically active polysubstituted pyrroles and 1,2,4,5-tetrasubstituted imidazolesderivatives using Cu@imine/Fe3O4 MNPs catalyst under solvent-free conditions is explained. This catalyst showed high reactivity for the synthesis of a set of different derivatives of polysubstituted pyrroles and 1,2,4,5-tetrasubstituted imidazolederivatives under appropriate reaction
一种利用Cu@imine/Fe 3 O 4绿色快速合成生物活性多取代吡咯和1,2,4,5-四取代咪唑衍生物的有效工艺解释了无溶剂条件下的 MNPs 催化剂。该催化剂在适当的反应条件和较短的反应时间下,对合成一组不同的多取代吡咯衍生物和1,2,4,5-四取代咪唑衍生物表现出高反应性。此外,催化剂还被回收和重复使用六次,反应性和产率没有显着降低。与已报道的工艺相比,该方法始终表现出催化剂负载量低、反应时间短、产物易于分离纯化、收率高、催化剂的可回收性和可回收性高等优点。
A series of polysubstituted pyrroles were rapidly synthesized in moderate to good yields via catalyst-free one-pot three-component reaction of 1,3-dicarbonyl compounds with primary amines and nitrostyrenes by using liquid-assisted grinding. This protocol provides several advantages over the conventional chemical synthesis, such as simple work-up procedure, wide substrate scope, short reaction time
采用液体辅助研磨,1,3-二羰基化合物与伯胺和硝基苯乙烯的无催化剂一锅三组分反应快速合成了一系列多取代吡咯,收率适中。该协议比传统的化学合成具有几个优点,例如简单的后处理程序、广泛的底物范围、短的反应时间和环境友好性。通过1 H NMR、13 C NMR 和 ESI-MS 研究证实了多取代吡咯的结构。
Synthesis of Cu 2 O/Ag nanocomposite and their catalytic application for the one pot synthesis of substituted pyrroles
作者:Aravind L. Gajengi、Clinton S. Fernandes、Bhalchandra M. Bhanage
DOI:10.1016/j.mcat.2017.10.010
日期:2018.5
protocol reports a facile and efficient method of preparation for Cu2O/Ag nanocomposite (NPs) using ethylene glycol under microwave irradiation within a short duration of time. The synthesized Cu2O/Ag NPs well characterized by XRD, FEG-SEM, EDS and NH3-TPD, ICP-AES techniques. Futher, the catalytic application of Cu2O/Ag NPs for the synthesis of substituted pyrroles via multicomponentreaction (MCRs) by using
本协议报告了在微波辐射下短时间内使用乙二醇制备Cu 2 O / Ag纳米复合材料(NPs)的简便有效方法。通过XRD,FEG-SEM,EDS和NH 3 -TPD,ICP-AES技术对合成的Cu 2 O / Ag NPs进行了很好的表征。此外,在室温下,通过使用醛,胺,1,3-二酮和硝基甲烷,通过多组分反应(MCR)催化应用Cu 2 O / Ag NPs合成取代的吡咯。催化体系可为多种底物提供良好的产品收率。催化剂也显示出优异的催化可循环性,而没有太多损失其活性。