CuI-Graphene nanocomposite catalyzed synthesis of chromene derivatives under ultrasound irradiation and Evaluation of antioxidant activity

Results in Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 102060 - 102060

Published: Jan. 1, 2025

Language: Английский

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Design, synthesis of a novel Schiff base derivative with fluorescence behavior: a structural and DFT based study

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 141806 - 141806

Published: Feb. 1, 2025

Language: Английский

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CSA@g-C3N4 as a novel, robust and efficient catalyst with excellent performance for the synthesis of 4H-chromenes derivatives

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Nov. 3, 2023

A pioneering robust and green heterogeneous acidic catalyst (CSA@g-C3N4) was rationally designed via immobilization of camphorsulfonic acid (CSA) on the g-C3N4 surface under mild conditions. Grafting CSA in lattice is distinguished as root cause facilitating structure change g-C3N4, leading to a unique morphology, accordingly remarkable catalytic efficiency CSA@g-C3N4. The morphology new as-prepared nano-catalyst specified by means FT-IR, XRD, SEM, EDS, TEM, TGA, BET. For first time, it exhibited that efficient CSA@g-C3N4 can productively accomplish three-component reactions with high yields also serve an inspiration for easily performing various sorts MCRs based our finding. recommended synthesis pathway chromenes derivatives facile cost-effective which applies condensation reaction salicylaldehyde, thiophenol, malononitrile followed ready purification benign manner. Moreover, nanocomposite be promptly reused, illustrating no sensational decrease activity after ten times.

Language: Английский

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Magnetically recoverable nanocatalyst for the synthesis of pyranopyrazoles: CoFe2O4@SiO2-HClO4

European Journal of Chemistry, Journal Year: 2023, Volume and Issue: 14(3), P. 385 - 392

Published: Sept. 30, 2023

The multiheterocyclic ring system shows valuable pharmaceutical and biological activities. In the present study, a microwave-assisted three-component reaction between aryl aldehyde, malononitrile, 5-methyl-2,4-dihydro-3H-pyrazole-3-one led to synthesis of pyrano[2,3-c]pyrazoles has been described. was carried out under solvent-free conditions in presence new magnetically recoverable nanocatalyst (CoFe2O4@SiO2-HClO4). reported protocol offers several advantages such as being environmentally benign, rapid, inexpensive, having high atom step economy, facile. simple method catalyst preparation, easy magnetic recovery, reusability for four runs are notable features nanocatalyst. Antibacterial activity all synthesized compounds tested against Escherichia coli Staphylococcus aureus. All showed promising may be used potential antibacterial candidate science.

Language: Английский

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Microwave-accelerated Eco-friendly Performance of the Knoevenagel Condensation Reaction with Various Active Methylene Derivat-ives evaluation of Electrochemical Properties

Current Organocatalysis, Journal Year: 2023, Volume and Issue: 10(2), P. 113 - 127

Published: March 6, 2023

Background: The present work describes sustainable Knoevenagel condensation reac-tion of aryl/ heterocyclic aldehyde with various active methylene derivatives such as malono-nitrile, dimedone, ethyl cyanoacetate, acetoacetate, barbituric acid, and thiobarbituric acid is reported. protocol was developed using water extract mango peel ash (WEMPA), an agro-waste that emerged a greener solvent media in combination microwave irradiation gave high-yield product isolation. method noticed added advantages for the reaction faster rate, inexpensive media, simple work-up, not required chromatographic puri-fication. synthesized benzyli-dinemalononitrile, benzylidenecyanoacetate, benzylideneacetoacetate, benzalbarbituric benzylidene-2-thiobarbituric 5,5-dimethylcyclohexane-1,3-diones were character-ized by FT-IR, 1H- & 13C-NMR, mass spectrometry. Further, selected inves-tigated their electrochemical studies cyclic voltammetry, showed comparable oxida-tion reduction potential properties. Objective: objective this to develop green methodology synthesis via give benzylidine-malononitrile, 5,5-dimethylcyclohexane-1,3-diones. Methods: We have demonstrated WEMPA homogenous catalytic medi-um economic products. found robust, non-toxic solvent-free work-up target product. investigated volt-ammetry method. Results: agro-waste-based catalyst avoids use external organic or inor-ganic base under irradiation. de-scribed faster, eco-friendly, filtration recrystallization excellent yield, purity compounds (8a-8d, 9a- 9d, 10a-10d, 11a,-11c, 12a, 12b, 13a-13c) subjected behavior good oxidation Conclusion: In summary, we established efficient, simple, based approach benzylidinemalononitrile, described. derived, which abundant nature recyclable without loss activity after four-run reaction, thus making one. are inexpensive, chemical free, requiring no metal catalyst, short time, isolated yields For first herein, reported products prepared, properties, these molecules will emerge antioxidant agents. other: NA

Language: Английский

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Six-membered ring systems: With O and/or S atoms

Progress in heterocyclic chemistry, Journal Year: 2023, Volume and Issue: unknown, P. 493 - 568

Published: Jan. 1, 2023

Language: Английский

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