Catalytic activity of reusable nickel oxide nanoparticles in the synthesis of spirooxindoles

Graphene oxide nanosheets were synthesized from natural graphite powder. The prepared catalyst was characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, thermogravimetric analysis and ultraviolet-visible spectroscopy. This heterogeneous catalyst was used for the Friedel-Crafts 3-indolylation reaction of isatin with indole derivatives in water as a green media in good to excellent yields. This method has advantages including the use of water as a green solvent, short reaction time, easy workup and excellent yields.

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“…We also compared the efficiency of GO with several catalysts [34][35][36][37][38][39][40]. The results are shown in Table 4.…”

Section: Resultsmentioning

confidence: 99%

Graphene oxide based solid acid as an efficient and reusable nano-catalyst for the green synthesis of diindolyl-oxindole derivatives in aqueous media

Allahresani

Nasseri

Akbari

et al. 2015

Reac Kinet Mech Cat

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“…In continuation of our work on the synthesis of efficient and nontoxic nanocatalysts and their application in the synthesis of biologically important compounds [47][48][49][50][51][52], in this work, we used Fe 3 O 4 @SiO 2 @sulfamic acid as a nanometer-scale, magnetic, supported, acidic catalyst for the synthesis of pyrazoles by the condensation of dicarbonyl compounds and hydrazines/hydrazides. Pyrazole and imine derivatives were produced with good to high yields (78-98 %) in aqueous medium (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Application of Fe3O4@SiO2@sulfamic acid magnetic nanoparticles as recyclable heterogeneous catalyst for the synthesis of imine and pyrazole derivatives in aqueous medium

Zakerinasab

Nasseri

Hassani³

et al. 2015

Res Chem Intermed

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Sulfamic acid supported on Fe 3 O 4 @SiO 2 superpara magnetic nanoparticles was successfully applied as a recyclable solid acid catalyst with a large density of sulfamic acid groups for the synthesis of pyrazole derivatives, an important class of potentially bioactive compounds. The products are obtained in high yield from the one-pot reaction procedure involving dicarbonyl compounds and hydrazines/hydrazides. This new method totally avoids the use of toxic or expensive solvents and organic acids in this reaction.

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“…Some catalysts have been applied for this transformation, including sodium stearate [9], sulfated choline based heteropolyanion [10], Protic guanidinium ionic liquid [11], 4-dimethylaminopyridine [12], [BMIm]BF 4 [13], SBA-Pr-SO 3 H [14], (SB-DBU)Cl [15], carbon-sulfonic acid [16], polyethylene glycol (PEG)-stabilized Ni nanoparticles [17], alpha-Amylase [18], ZnS nanoparticles [19], triphenylphosphine [20] and nickel oxide [21]. Therefore, considerable attention has been focused on the development of new methods for the synthesis of these compounds.…”

Section: Introductionmentioning

confidence: 99%

Silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride catalyzed synthesis of spiropyran derivatives

Moosavi‐Zare¹,

Noroozizadeh

Salehi-Moratab

et al. 2016

Journal of Molecular Catalysis A: Chemical

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a b s t r a c tIn this research, a novel nanostructured heterogeneous catalyst, namely silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride (SBDBSAC), as an acidic ionic liquid based on 1,4-diaza-bicyclo[2.2.2]octane ring bonded to silica has been prepared and fully characterized by several techniques such as fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermogravimetric (DTG), scanning electron microscope (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray analysis (EDX). The nanostructured catalyst has been suxessfully used as reusable nanostructured catalyst for green, simple and efficient synthesis of spiropyrans by the one-pot tandem Knoevenagel-Michael-cyclization reaction of isatin derivatives or acenaphthenquinone with barbituric acid derivatives, and 1,3-dicarbonyl compounds under aqueous media.

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Catalytic activity of reusable nickel oxide nanoparticles in the synthesis of spirooxindoles

Abstract: This study focuses on nickel oxide nanoparticles as efficient nanocatalysts in the synthesis of oxindoles as an important class of potentially bioactive compounds.

Cited by 54 publications

References 22 publications

Graphene oxide based solid acid as an efficient and reusable nano-catalyst for the green synthesis of diindolyl-oxindole derivatives in aqueous media

Graphene oxide based solid acid as an efficient and reusable nano-catalyst for the green synthesis of diindolyl-oxindole derivatives in aqueous media

Application of Fe3O4@SiO2@sulfamic acid magnetic nanoparticles as recyclable heterogeneous catalyst for the synthesis of imine and pyrazole derivatives in aqueous medium

Silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride catalyzed synthesis of spiropyran derivatives

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