A simple aloe vera plant-extracted microwave and conventional combustion synthesis: Morphological, optical, magnetic and catalytic properties of CoFe2O4 nanostructures

Journal of Molecular Structure, Год журнала: 2014, Номер 1076, С. 188 - 200

Опубликована: Июль 27, 2014

Язык: Английский

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Cobalt ferrite nanoparticles (CoFe₂O₄ MNPs) as catalyst and support: magnetically recoverable nanocatalysts in organic synthesis

Nanotechnology Reviews, Год журнала: 2017, Номер 7(1), С. 43 - 68

Опубликована: Окт. 10, 2017

Abstract Recovery and reusability of catalysts is an important aspect in modern catalysis research especially organic synthesis. Compared to the conventional separation, magnetic separation has emerged as a robust, highly efficient, easy rapid technique for products catalysts. Cobalt ferrite nanoparticles are well-known material, recognized CoFe 2 O 4 MNPs, can be used both catalyst versatile support functionalization metals, organocatalysts. In recent times, clearly experienced renaissance area utility cobalt (CoFe MNPs) nanocatalysts based on their ability recovery reusability; activity these MNPs was investigated category reactions. this review, fabrication, characterization, application (CF-MNPs) reactions have well summarized.

Язык: Английский

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Deep eutectic solvent based on choline chloride and malonic acid as an efficient and reusable catalytic system for one-pot synthesis of functionalized pyrroles

RSC Advances, Год журнала: 2014, Номер 5(10), С. 7720 - 7728

Опубликована: Дек. 22, 2014

Deep eutectic solvent (DES) based on choline chloride and malonic acid was applied as catalyst reaction medium for synthesis of pyrroles by one-pot, four-component amines, aldehydes, 1,3-dicarbonyl compounds nitromethane.

Язык: Английский

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A review on multi-component green synthesis of N-containing heterocycles using mixed oxides as heterogeneous catalysts

Arabian Journal of Chemistry, Год журнала: 2017, Номер 13(1), С. 1142 - 1178

Опубликована: Окт. 12, 2017

The use of mixed oxides is a well-appreciated approach in the fields material science and synthesis, due to remarkable tunable surface properties such as acidic basic characteristics, oxidation/reduction capabilities, high agility lattice oxygen, which makes them ideal choices heterogeneous catalysts. activity broadly relies on nature support active used preparation method, calcination temperatures. Wide range techniques for oxide materials are adoptable, viz. sol-gel, co-precipitation, wet impregnation, microwave irradiation hydrothermal methods. Use solid catalysts have gained popularity many valued organic transformations, via alkylation, oxidation, condensation, dehydration, dehydrogenation, cycloaddition isomerization. Application area green synthesis valuable strategy, contributed significantly design novel heterocyclic scaffolds. chemistry N-heterocycle scaffolds, generally possess five six membered rings, an interesting both synthetic medicinal research constituting over 60% organics various arenas. position number nitrogen atoms distinguish pyrroles, pyrazoles, imidazoles, triazoles, pyridines pyramidines classes. In this review, we focus scope, importance versatile applications metal their synergetic effects variety N-heterocyclic derivatives. scientific aspects catalytic efficient protocols transformations also discussed.

Язык: Английский

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Superparamagnetic CuFeO₂ Nanoparticles in Deep Eutectic Solvent: an Efficient and Recyclable Catalytic System for the Synthesis of Imidazo[1,2‐a]pyridines

ChemCatChem, Год журнала: 2014, Номер 6(10), С. 2854 - 2859

Опубликована: Авг. 19, 2014

Abstract Superparamagnetic CuFeO 2 nanoparticles were prepared and characterized by XRD, SEM, TEM, FRIR spectroscopy, vibrating sample magnetometry techniques. The catalytic activity of was investigated in the one‐pot, three‐component reaction 2‐aminopyridines, aldehydes, alkynes using citric acid–dimethylurea melt as a green solvent. An array imidazo[1,2‐ ]pyridines obtained good to excellent yields. system can be successfully reused six times with keeping its performance.

Язык: Английский

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Recent advances in the syntheses of pyrroles

Green Synthesis and Catalysis, Год журнала: 2022, Номер 4(1), С. 20 - 34

Опубликована: Июнь 23, 2022

The pyrrole moiety is an important structural motif in functional materials, natural products, and pharmaceuticals. More more synthetic strategies toward pyrroles have emerged, where various efficient building blocks are developed these synthons enable the syntheses of with different numbers components. However, no review specifically summarizes according to type number employed blocks. To aid researchers design appropriate substrates for synthesis, herein we summarized advances classified reactions into four categories components, which may shed light on developing methods substituted pyrroles.

Язык: Английский

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Recent advances in the application of magnetic nanocatalysts in multicomponent reactions

RSC Advances, Год журнала: 2023, Номер 13(30), С. 20530 - 20556

Опубликована: Янв. 1, 2023

A comprehensive review on the preparation of diverse functionalized magnetic nanomaterials and their specific applications multicomponent reactions.

Язык: Английский

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Magnetically separable graphene oxide anchored sulfonic acid: a novel, highly efficient and recyclable catalyst for one-pot synthesis of 3,6-di(pyridin-3-yl)-1H-pyrazolo[3,4-b]pyridine-5-carbonitriles in deep eutectic solvent under microwave irradiation

RSC Advances, Год журнала: 2016, Номер 6(108), С. 106160 - 106170

Опубликована: Янв. 1, 2016

A magnetic separable sulfonic acid catalyst was prepared and applied for the synthesis of 3,6-di(pyridin-3-yl)-1H-pyrazolo[3,4-b]pyridine-5-carbonitriles via three-component reaction 1-phenyl-3-(pyridin-3-yl)-1H-pyrazol-5-amine, β-ketonitrile aldehydes in DES.

Язык: Английский

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Meglumine catalyzed expeditious four-component domino protocol for synthesis of pyrazolopyranopyrimidines in aqueous medium

RSC Advances, Год журнала: 2014, Номер 4(93), С. 51580 - 51588

Опубликована: Янв. 1, 2014

Meglumine has been found to be an efficient catalyst for the synthesis of structurally diverse tricyclic fused pyrazolopyranopyrimidines by one-pot, four-component reaction ethyl acetoacetate, hydrazine hydrate, aromatic aldehydes and barbituric acid in water.

Язык: Английский

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Heterogeneous Fe-MIL-101 catalysts for efficient one-pot four-component coupling synthesis of highly substituted pyrroles

New Journal of Chemistry, Год журнала: 2015, Номер 39(6), С. 4919 - 4923

Опубликована: Янв. 1, 2015

Fe-MIL-101 as efficient heterogeneous catalysts for four-component coupling synthesis of highly substituted pyrroles.

Язык: Английский

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