Ferrocene-Functionalized Dithiocarbamate Zinc(II) Complexes as Efficient Bifunctional Catalysts for the One-Pot Synthesis of Chromene and Imidazopyrimidine Derivatives via Knoevenagel Condensation Reaction
作者:Anamika、Chote Lal Yadav、Michael G. B. Drew、Kamlesh Kumar、Nanhai Singh
DOI:10.1021/acs.inorgchem.1c00162
日期:2021.5.3
analyses, IR, UV–vis, and 1H and 13C1H} NMR spectroscopic techniques. The solid-statestructures of complexes 1, 3, and 4 have been determined by single-crystal X-ray crystallography as well as powder X-ray diffraction. Single-crystal X-ray crystallography revealed a monomeric structure for complex 1 but 1Dpolymericstructures for complexes 3 and 4. In all complexes, dithiocarbamate ligands are bonded
Starch functionalized magnetite nanoparticles: A green, biocatalyst for one-pot multicomponent synthesis of imidazopyrimidine derivatives in aqueous medium under ultrasound irradiation
efficient and environmentally friendly one-pot multicomponent synthesis of biologically fascinating imidazopyrimidine derivatives by the reaction of aromatic aldehydes, active methylene compounds and 2-aminobenzimidazole under ultrasonic irradiation have been developed. The reaction is catalyzed by starch functionalized magnetite nanoparticles (s-Fe3O4). The salient features of the present methodology
Synthesis of substituted pyrimidine using
<scp>
ZnFe
<sub>2</sub>
O
<sub>4</sub>
</scp>
nanocatalyst via one pot multi‐component reaction ultrasonic irradiation
作者:Pravin Chavan、Sachin Bangale、Dattatraya Pansare、Rohini Shelke、Shivaji Jadhav、Shrikrushna Tupare、Dhanraj Kamble、Megha Rai
DOI:10.1002/jhet.4048
日期:——
highly efficient, eco‐friendly, recyclable heterogeneous ZnFe2O4 nanocatalyzed synthesis of 2‐amino‐4‐substituted 1,4‐dihydrobenzo[4,5]imidazo[1,2‐a]pyrimidine‐3‐carbonitrile (4a‐j) derivatives via one pot multicomponentreaction of benzimidazole (1), substituted aromatic aldehyde (2a‐j) and malononitrile (3) underultrasonicirradiations. Significance of this synthetic approach is short reaction time
高效,环保,可回收的异质ZnFe 2 O 4纳米催化合成2-氨基-4-取代的1,4-二氢苯并[4,5]咪唑并[1,2-a]嘧啶-3-腈(4a- j)通过苯并咪唑(1),取代的芳香醛(2a-j)和丙二腈(3)的一锅多组分反应的衍生物。这种合成方法的意义在于反应时间短,易于处理,简单,高效,高收率和可回收的催化剂。
Synthesis and structural features of indium(<scp>iii</scp>) furan-2-thiocarboxylates showing efficient catalytic activity toward multicomponent reactions <i>via</i> Knoevenagel condensation
In(SCOf)3 (7), a thioester fCOSCH2SCOf (8) was obtained serendipitously; thus, a novel convenient approach for thioester synthesis is introduced. The catalyticactivities of all the complexes were assessed for Knoevenagelcondensation and Knoevenagel initiated MCRs for the synthesis of chromene and imidazopyrimidine derivatives and it was found that complex 2 is a very efficient catalyst (much superior
Microwave‐assisted synthesis of benzo[4,5]imidazo[1,2‐<i>a</i>]pyrimidines and pyrano[4,3‐<i>b</i>]pyrans catalyzed by L‐glutamine functionalized magnetic nanoparticles in water:ethanol mixture
作者:Aiborlang Thongni、Rishanlang Nongkhlaw、Chayan Pandya、Akella Sivaramakrishna、Paige M. Gannon、Werner Kaminsky
DOI:10.1002/jhet.4785
日期:2024.4
one-pot syntheses of benzo[4,5]imidazo[1,2-a]pyrimidine and pyrano[4,3-b]pyran derivatives using L-glutamine functionalized nanoparticles (Fe3O4@SiO2@L-glutamine NPs) undermicrowave irradiation. The organo-nanocatalyst underwent characterization through diverse techniques, including FT-IR, p-XRD, SEM, TEM, EDX, XPS, TGA, and VSM. Microwave irradiation and multicomponent reactions synergistically yield