Sulfonic acid supported on Fe2O3/VO2 nanocatalyst: A highly efficient and reusable nanocatalyst for synthesis of spirooxindole derivatives

Hassani, Hassan; Nozarie, Azadeh

doi:10.22631/ajgc.2017.101572.1032

Cited by 26 publications

(7 citation statements)

References 22 publications

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“…A solid state based mechanochemical process conforms to most of the aspects of green chemistry and thus is appealing for use in the organic synthesis. In continuation of our previous report [10][11][12][13][14][15] [16][17][18][19][20][21][22]. we described a mild and solvent free mechanochemical path for the synthesis of bis(indolyl)methanes from indole and aldehyde using silica supported-boron sulfonic acid as a new and versatile and reusable catalyst at solvent free and room temperature.…”

Section: Asian Journal Of Nanoscience and Materialsmentioning

confidence: 89%

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Sajjadifar

Mansouri

Miraninezhad

2018

Asian J. Nanosci. Mater.

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Silica supported-boron sulfonic acid (SBSA) was used as a cheap and mild bronsted acidic in the reaction of indole with aldehydes to afford the corresponding bis(indolyl)methanesin in solvent free grinding and room temperature. The catalyst is also effective in the reaction in good yields. This methodology offers several advantages, such as good yields, reusability of catalyst, short reaction times, simple procedure, and mild conditions. The catalyst can be recovered and reused without loss of activity. The work-up of the reaction consists of a simple filtration, followed by concentration of the crude product and purification.

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Section: Asian Journal Of Nanoscience and Materialsmentioning

confidence: 89%

Untitled

Sajjadifar

Mansouri

Miraninezhad

2018

Asian J. Nanosci. Mater.

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“…In recent years, these new materials have been considered for their unique properties [12][13][14]. Magnetic nano-materials have attracted more and more attention due to the good stability, large surface-tovolume ratio, and efficient recovery procedure by magnetic attraction, which lead to versatile applications in biotechnology, biomedicine, environmental [15][16][17][18]. One of its features is that most of the atoms are on the surface of the NPs.…”

Section: Original Research Articlementioning

confidence: 99%

NiFe2O4 coated sand as a nano-adsorbent for removal of Pb (II) from aqueous solutions

Asl

Mohseni‐Shahri

Moeinpour

2019

Eurasian Chem. Commun.

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In this study, NiFe2O4 magnetic nanoparticles as an adsorbent for lead (Pb) removal were coated on sand particles. Adsorption studies were conducted to investigate the efficacy of contact time, pH, adsorbent dosage and initial lead ion concentration on the removal efficiency. To choose the most fitting kinetic model, the pseudo-first order and pseudo-second order models were compared and the most suitable kinetic model was selected by the pseudo-second order. Langmuir and Freundlich isotherms were evaluated and the most suitable isotherm was observed as the Freundlich model. In addition, the NiFe2O4 coated sand can simply be removed by an ordinary filtration process.

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“…Also, a large number of pyrimidine derivatives consisting of barbituric acid and 2‐aminouracil have attracted great attention for their biological activities and applications in medicine and therapeutics. Hence, a number of procedures have been reported for the preparation of spirooxindole derivatives . Spirooxindoles in general are reported to exhibit several pharmacological activities including anticonvulsant, antimicrobial, anticancer, anti‐inflammatory, antiviral and antiproliferative activities.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient and green approach for the synthesis of spirooxindole derivatives in the presence of novel Brønsted acidic ionic liquids incorporated in UiO‐66 nanocages

Mirhosseini‐Eshkevari

Ghasemzadeh

Esnaashari

2019

Applied Organom Chemis

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An efficient and green approach is reported for the rapid synthesis of spirocyclic 2-oxindole using triethylenediamine or imidazole Brønsted acidic ionic liquids supported in Zr metal-organic framework (TEDA/IMIZ-BAIL@UiO-66) as a novel, superior and retrievable heterogeneous catalyst under ultrasonic irradiation. Heterocyclic compounds including pyrido[2,3d:6,5-d′]dipyrimidines and indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidines were obtained by the one-pot condensation reaction of 6-amino-1,3-dimethyluracil, isatins and cyclic 1,3-diketone (barbituric acid or 1,3-indanedione). The reusability of the catalyst, low catalyst loading, short reaction times, excellent yields, simple work-up, and use of sonochemical procedure as a mild process and an alternative energy source are some of the advantages of this method. Furthermore, the novel heterogeneous nanocomposite was fully characterized using various techniques.

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Sulfonic acid supported on Fe2O3/VO2 nanocatalyst: A highly efficient and reusable nanocatalyst for synthesis of spirooxindole derivatives

Cited by 26 publications

References 22 publications

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NiFe2O4 coated sand as a nano-adsorbent for removal of Pb (II) from aqueous solutions

Highly efficient and green approach for the synthesis of spirooxindole derivatives in the presence of novel Brønsted acidic ionic liquids incorporated in UiO‐66 nanocages

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