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。
Copper Schiff base complex immobilized on silica-coated Fe<sub>3</sub>
O<sub>4</sub>
nanoparticles: a recoverable and efficient catalyst for synthesis of polysubstituted pyrroles
In this work, a copper Schiff base complex immobilized on silica‐coated Fe3O4 nanoparticles is synthesized, and studied as a highly efficient, recyclable, green and heterogeneous catalyst for the preparation of polysubstituted pyrroles under solvent‐free and mild conditions. This new catalyst was characterized by different techniques, such as Fourier transform infrared (FT‐IR), X‐ray powder diffraction
在这项工作中,固定在二氧化硅涂层的Fe 3 O 4上的铜席夫碱络合物纳米颗粒已被合成,并作为一种高效,可回收,绿色和非均相的催化剂进行研究,用于在无溶剂和温和条件下制备多取代吡咯。这种新催化剂的特征在于不同的技术,例如傅立叶变换红外(FT-IR),X射线粉末衍射(XRD),场发射扫描电子显微镜(SEM),能量色散X射线光谱法(EDX),电感耦合等离子体(ICP)和振动样品磁力法(VSM)。在上述催化剂存在下,硝基甲烷,芳基醛,1,3-二羰基化合物和胺的简单,环境单锅多组分缩合可在室温下提供标题化合物。在最后,
Bromodimethylsulfonium Bromide (BDMS)-catalyzed Synthesis of Substituted Pyrroles through a One-pot Four-component Reaction
作者:Prasanta Ray Bagdi、R. Sidick Basha、Mohan Lal、Abu T. Khan
DOI:10.1246/cl.130317
日期:2013.8.5
Trisubstituted N-benzylpyrrole derivatives were synthesized through a one-pot four-component reaction from β-keto esters, benzylamines, aromatic aldehydes, and nitromethane in the presence of 10 mo...
以β-酮酯、苄胺、芳香醛和硝基甲烷为原料,在10 mo 存在下,通过一锅四组分反应合成了三取代的N-苄基吡咯衍生物。
One-pot synthesis of highly substituted pyrroles using nano copper oxide as an effective heterogeneous nanocatalyst
作者:Hamid Saeidian、Morteza Abdoli、Robab Salimi
DOI:10.1016/j.crci.2013.02.008
日期:2013.11
Résumé A convenient one-pot four-component reaction of aromatic aldehydes, β-keto esters and nitromethane in the presence an amine and 10 mol% CuO nanoparticles for the synthesis of highly substituted pyrroles is described. Excellent yields, easily available and less expensive catalyst and easy work-up are the key features of the present method. The NMR spectrum was coupled with quantum chemical calculations in DFT approach using the hybrid B3LYP exchange-correlation functional to confirm the structures of (1-benzyl-4-(4-chlorophenyl)-2-methyl-1H-pyrrol-3-yl)(phenyl)methanone 14 and 1-(1-benzyl-4-(4-chlorophenyl)-2-phenyl-1H-pyrrol-3-yl)ethanone 14′.
Synthesis of tetra-substituted pyrroles, a potential phosphodiesterase 4B inhibitor, through nickel(II) chloride hexahydrate catalyzed one-pot four-component reaction
作者:Abu T. Khan、Mohan Lal、Prasanta Ray Bagdi、R. Sidick Basha、Parameswaran Saravanan、Sanjukta Patra
DOI:10.1016/j.tetlet.2012.05.133
日期:2012.8
variety of tetra-substituted pyrrole derivatives were synthesized through one-pot four-component condensation reaction of aromatic aldehydes, benzylamines, β-ketoesters, and nitroalkanes in the presence of 10 mol % NiCl2·6H2O in good yields. Some of them exhibit properties as potential inhibitors of phosphodiesterase 4B (PDE4B) through docking studies.