Hercynite silica sulfuric acid: a novel inorganic sulfurous solid acid catalyst for one-pot cascade organic transformations

RSC Advances, Год журнала: 2022, Номер 12(40), С. 26023 - 26041

Опубликована: Янв. 1, 2022

Herein, we delignated the synthesis of a novel inorganic sulfurous magnetic solid acid catalyst by immobilization an extremely high content sulfuric functionalities on amorphous silica-modified hercynite nanomagnetic core-shell via simple method. Silica (SSA) modified nanocomposite (hercynite@SSA) combines excellent recoverability and stability characteristics (which can be regarded as ferro spinel with Fd3m space group cubic crystal structure) strong Brønsted properties -SO3H groups. This was found to efficient facile for bis(pyrazolyl)methanes two different one-pot multicomponent methodologies under green conditions. The hercynite@SSA shows catalytic activity reusability in ethanolic medium among materials. A plausible reaction mechanism is proposed this synthesis.

Язык: Английский

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Amine functionalized magnetic resorcinol formaldehyde as a green and reusable nanocatalyst for the Knoevenagel condensation

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Янв. 22, 2025

Язык: Английский

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Development of a Silica-Organic Framework Ionic Solid Bronsted Acid Catalyst for the Synthesis of 2,4,5-trisubstituted Imidazole Derivatives

Journal of the Turkish Chemical Society Section A Chemistry, Год журнала: 2025, Номер 12(1), С. 1 - 14

Опубликована: Март 3, 2025

Heterogeneous Bronsted acid is one of the most promising compounds that can be used as a catalyst in chemical production, and certainly have positive impact on environment. This research includes preparation heterogeneous by using rice hulls starting material. The prepared was characterized FTIR, XRD, TGA, SEM-EDX, TEM, elemental analysis. FTIR results showed presence N-H S=O absorption bands within expected range acid. specific surface area determined Brunauer-Emmett-Teller (BET) nitrogen adsorption method 205.42 m2/g, average pore diameters are 3.69 nm, 2,4,5-Trisubstituted imidazole derivatives were reacting substituted aldehydes with benzil ammonium acetate solid catalyst. main advantages this safe, cheap, short reaction conditions. In addition, reused.

Язык: Английский

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A novel Hercynite‐supported tetradentate Schiff base complex of manganese catalyzed one‐pot annulation reactions

Applied Organometallic Chemistry, Год журнала: 2022, Номер 36(12)

Опубликована: Сен. 24, 2022

The present study is the first report on synthesis and catalytic performance of Hercynite nanoparticles capped with a novel Schiff base–manganese(II) complex brought from synthetic procedure. solid support catalyst were characterized using various analytical techniques. characterization results suggest excellent dispersibility, stability, high Mn content under surface, small size catalyst, which leads to activity selectivity. Moreover, proved be sustainable recyclable for rapid chromene‐ pyran‐annulated heterocycles ambient conditions. effect crucial parameters was investigated optimized. scope reaction extended aryl aldehydes keto–enol tautomeric pairs (2‐hydroxy‐1,4‐naphthoquinone or dimedone), corresponding 2‐amino‐3‐cyano‐4 H ‐chromene ‐pyran products obtained yield (82–99%) at low time (10–115 min). Significantly, indicated magnetic, cost‐effective, nontoxic properties, result in having recycling efficiency (5 cycles).

Язык: Английский

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Macrocyclic pseudo crown-ether- manganese (II) complex coated on nanomagnetic LDH- catalyzed Biginelli annulation reactions

Journal of Physics and Chemistry of Solids, Год журнала: 2023, Номер 175, С. 111222 - 111222

Опубликована: Янв. 7, 2023

Язык: Английский

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γ‐Fe₂O₃@Cu₃Al‐LDH/HEPES a novel heterogeneous amphoteric catalyst for synthesis of annulated pyrazolo[3,4‐d]pyrimidines

Applied Organometallic Chemistry, Год журнала: 2022, Номер 36(10)

Опубликована: Июль 18, 2022

An efficient synthetic method for the heterogenization of bifunctional zwitterionic HEPES catalyst on LDH modified γ‐Fe 2 O 3 magnetic nanoparticles (MNPs) was developed to create a novel polar catalytic environment tandem catalysis. The efficiency resulted acid/base (γ‐Fe @Cu Al‐LDH/HEPES) investigated in Biginelli‐like synthesis biologically active pyrazolo[3,4‐d]pyrimidines via cyclocondensation 3‐methyl, 1‐phenyl‐H1‐pyrazole‐5‐ol with various aromatic aldehydes and urea derivatives mixture water ethanol (1:1) under reflux conditions. Besides, desired products were reached high conversions powerful reusability. Utilization simple mild reaction conditions, hybrid groups, short time, green safe solvent, performance good recyclability, easy purification products, magnetically work‐up make this methodology an interesting effective option Biginelli reaction.

Язык: Английский

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Immobilization of Ag and Pd over a novel amide based covalent organic framework (COF-BASU2) as a heterogeneous reusable catalyst to reduce nitroarenes

Inorganica Chimica Acta, Год журнала: 2022, Номер 545, С. 121251 - 121251

Опубликована: Окт. 20, 2022

Язык: Английский

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The synthesis of new polyhydroquinoline derivatives using nano-[Fe3O4@SiO2/N-propyl-1-(thiophene-2-yl) ethanimine][CoCl2] as a novel supported magnetite catalyst

Journal of Molecular Structure, Год журнала: 2024, Номер 1314, С. 138797 - 138797

Опубликована: Май 29, 2024

Язык: Английский

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Magnetic BiFeO3 nanoparticles: a robust and efficient nanocatalyst for the green one-pot three-component synthesis of highly substituted 3,4-dihydropyrimidine-2(1H)-one/thione derivatives

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Сен. 27, 2024

Язык: Английский

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Introducing Fe3O4@SiO2@KCC-1@MPTMS@CuII catalytic applications for the green one-pot syntheses of 2-aryl(or heteroaryl)-2,3-dihydroquinazolin-4(1H)-ones and 9-aryl-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-diones

Journal of Molecular Structure, Год журнала: 2022, Номер 1271, С. 134017 - 134017

Опубликована: Авг. 28, 2022

Язык: Английский

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