Hyperbranched 5-sulfosalicylic acid-TDI-chitosan decorated by Fe3O4 nanoparticles: a highly efficient solid acid organocatalyst for the synthesis of quinazoline derivatives under green conditions DOI Creative Commons

Reyhaneh Peyvasteh,

Mohammad G. Dekamin, Ehsan Valiey

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: May 30, 2023

Abstract In this research, a new magnetic decorated hyperbranched chitosan by grafting of 5-sulfosalicylic acid using toluene-2,4-diisocyanate linker (CS-TDI-SSA-Fe3O4) was designed and prepared conveniently. The obtained biopolymeric nanomaterial properly characterized FT-IR, EDX XRD, FESEM, TGA VSM spectroscopic, microscopic, or analytical methods. supramolecular CS-TDI-SSA-Fe3O4 nanocomposite investigated, as heterogeneous solid acidic organocatalyst, to promote three-component synthesis 2,3-dihydroquinazoline-4(1H)-one derivatives under green chemistry conditions. nanocatalyst demonstraed act highly efficient for the various quinazoline derivatives, an important pharmaceutical scaffold, through multicomponent strategy. reaction proceeds very well in presence EtOH afford corresponding high excellent yields. Key advantages present protocol are use renewable biodegredable simple procedure preparation hybrid material. Furthermore, catalyst can be used at least five times with slight decrease its catalytic activity.

Language: Английский

Hydrothermal Synthesis of Sulfuric Acid-Mediated Yellow Carbon Dots and It Applications in Fluorescent Ink and Cell Imaging DOI
Ziyi Zhang, Yuhang Zhou, Nuonuo Zhang

et al.

Journal of Fluorescence, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Language: Английский

Citations

0
Trimesic acid-functionalized chitosan: A novel and efficient multifunctional organocatalyst for green synthesis of polyhydroquinolines and acridinediones under mild conditions DOI Creative Commons

Rahman Beiranvand,

Mohammad G. Dekamin

Heliyon, Journal Year: 2023, Volume and Issue: 9(6), P. e16315 - e16315

Published: May 17, 2023

Trimesic acid-functionalized chitosan (Cs/ECH-TMA) material was prepared through a simple procedure by using inexpensive and commercially available (Cs), epichlorohydrin (ECH) linker trimesic acid (TMA). The obtained bio-based Cs/ECH-TMA characterized energy-dispersive X-ray (EDX) Fourier-transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM) diffraction (XRD) analysis. successfully used, as multifunctional heterogeneous sustainable catalyst, for efficient expeditious synthesis of medicinally important polyhydroquinoline (PHQ) polyhydroacridinedione (PHA) scaffolds the Hantzsch condensation in one-pot reaction. Indeed, can be considered synergistic organocatalyst due to presence large number acidic active sites its structure well hydrophilicity. Both PHQs PHAs were synthesized biodegradable catalytic system from their corresponding substrates EtOH under reflux conditions high quantitative yields. catalyst is recyclable reused at least four times without significant loss activity.

Language: Английский

Citations

10
Pyromellitic acid grafted to cross-linked LDH by dendritic units: An efficient and recyclable heterogeneous catalyst for green synthesis of 2,3-dihydro quinazoline and dihydropyrimidinones derivatives DOI Creative Commons

Nastaran Ghanbari,

Hossein Ghafuri

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e20978 - e20978

Published: Oct. 17, 2023

In this work, using layered double hydroxide (LDH) inorganic substrate, melamine as binding agent and dendrimer G1 also pyromellitic acid (PMA) organic catalytic a heterogeneous catalyst was designed prepared. After that, the prepared organic-inorganic evaluated by various identification techniques such FTIR, EDX, XRD, TGA, FESEM, BET, results showed that desired structure successfully Also, in order to investigate efficiency of LDH@Me-PMA nanocatalyst an efficient catalyst, it used for green one-pot synthesis 2,3-dihydro quinazoline 3,4-dihydropyrimidinone-2-(1H)-ones derivatives. The use led derivatives with higher shorter reaction time than previously reported works. addition, has ability be recycled reused 5 consecutive periods high stability, which is well consistent principles chemistry.

Language: Английский

Citations

8
Cu(II)/citric acid grafted to chitosan by dendritic units of melamine as a novel and highly efficient heterogeneous catalyst for the synthesis of 2-aminobenzothiazole derivatives DOI Creative Commons

Babak Fattahi,

Mohammad G. Dekamin

Colloids and Interface Science Communications, Journal Year: 2023, Volume and Issue: 54, P. 100711 - 100711

Published: May 1, 2023

In this paper, a new cross-linked chitosan by G1 dendrimer from melamine terminated citric acid groups to support Cu(II) nanoparticles ([email protected]@Cu) was designed and prepared. Subsequently, the prepared nanocomposite characterized using different spectroscopic, microscopic analytical techniques such as FTIR, XRD, FESEM, TGA EDX. The supramolecular [email protected]@Cu demonstrates higher thermal chemical stability than its components. addition, in order investigate catalytic performance of bio-based it used, Lewis acidic green heterogeneous catalyst, for preparation 2-aminobenzothiazole derivatives under conditions. Also, other advantages include easy preparation, high activity, recyclability, reuse with gradual decreasing activity.

Language: Английский

Citations

7
Supramolecular Cu(ii) nanoparticles supported on a functionalized chitosan containing urea and thiourea bridges as a recoverable nanocatalyst for efficient synthesis of 1H-tetrazoles DOI Creative Commons
Shirin Bondarian, Mohammad G. Dekamin, Ehsan Valiey

et al.

RSC Advances, Journal Year: 2023, Volume and Issue: 13(39), P. 27088 - 27105

Published: Jan. 1, 2023

A cost-effective and convenient method for supporting of Cu(ii) nanoparticles on a modified chitosan backbone containing urea thiourea bridges using thiosemicarbazide (TS), pyromellitic dianhydride (PMDA) toluene-2,4-diisocyanate (TDI) linkers was designed. The prepared supramolecular (CS-TDI-PMDA-TS-Cu(ii)) nanocomposite characterized by Fourier-transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), thermogravimetry/differential thermogravimetry analysis (TGA/DTA), energy-dispersive X-ray spectroscopy (EDS), EDS elemental mapping diffraction (XRD). obtained CS-TDI-PMDA-TS-Cu(ii) nanomaterial demonstrated to act as multifunctional nanocatalyst promoting multicomponent cascade Knoevenagel condensation/click 1,3-dipolar azide-nitrile cycloaddition reactions very efficiently between aromatic aldehydes, sodium azide malononitrile under solvent-free conditions affording the corresponding (E)-2-(1H-tetrazole-5-yl)-3-arylacrylenenitrile derivatives. Low catalyst loading, working short reaction time well easy preparation recycling, reuse five consecutive cycles without considerable decrease in its catalytic efficiency make it suitable candidate promoted Cu species.

Language: Английский

Citations

7
Selective synthesis of 2,3-dihydroquinazolin-4(1H)-ones and their N1-substituted analogues via Pd(II)-catalyzed cascade annulation of o-aminobenzoic acids with CO, ammonium acetate and aldehydes DOI
Xiaopeng Zhang,

Qiuyang Pang,

Dan Liŭ

et al.

Tetrahedron, Journal Year: 2024, Volume and Issue: 155, P. 133915 - 133915

Published: Feb. 22, 2024

Language: Английский

Citations

2
Chitosan-EDTA-Cellulose bio-based network: A recyclable multifunctional organocatalyst for green and expeditious synthesis of Hantzsch esters DOI Creative Commons
Negin Rostami, Mohammad G. Dekamin, Ehsan Valiey

et al.

Carbohydrate Polymer Technologies and Applications, Journal Year: 2022, Volume and Issue: 5, P. 100279 - 100279

Published: Dec. 25, 2022

The cellulose grafted to chitosan by ethylenediaminetetraacetic acid (Cs-EDTA-Cell) material was prepared and characterized different spectroscopic, microscopic or analytical methods techniques including Fourier transform infrared (FTIR) ultraviolet–visible diffuse reflectance (UV–Vis-DRS) spectroscopy, field emission scanning electron microscopy (FESEM), X-ray powder diffraction (XRD) as well Brunauer-Emmett-Teller (BET) surface area, thermogravimetric, differential thermal analysis. obtained Cs-EDTA-Cell network found be more thermally stable than its original carbohydrate polymers components. bio-based contains appropriate acidic basic active sites with proper geometry act a multifunctional organocatalyst at nanoscale. synergic effect of components were demonstrated promote multicomponent synthesis polyhydroquinoline 1,8-dioxo-decahydroacridine derivatives under green environmentally-benign conditions. A large number fused Hantzsch esters synthesized using low catalyst loading, in high excellent yields, short reaction times, simple work-up procedure. Furthermore, the network, heterogeneous catalyst, reusability can used least for five consecutive runs without significant loss activity.

Language: Английский

Citations

11
Melamine-terephthalaldehyde covalent organic framework-copper-tetrabenzenecarboxylic acid metal organic framework (COF–MOF): an efficient heterogeneous acidic catalyst for the one-pot preparation of 2,3-dihydroquinazoline-4(1H)-one derivatives DOI

Zahra Baymaninezhad,

Haman Tavakkoli, Seyyed Jafar Saghanezhad

et al.

Research on Chemical Intermediates, Journal Year: 2023, Volume and Issue: 49(11), P. 5101 - 5119

Published: Aug. 16, 2023

Language: Английский

Citations

5
Optimization of green and environmentally-benign synthesis of isoamyl acetate in the presence of ball-milled seashells by response surface methodology DOI Creative Commons

Amir Hossein Fattahi,

Mohammad G. Dekamin, James H. Clark

et al.

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

Published: Feb. 16, 2023

Ball-milled seashells, as a nano-biocomposite catalyst and natural source of CaCO3 in its aragonite microcrystalline form with fixed CO2, was optimized for the synthesis isoamyl acetate (3-methylbutyl ethanoate) by response surface methodology five-level three-factor rotatable circumscribed central composite design. The seashells has proved to be an excellent heterogeneous multifunctional green environmentally-benign from acetic acid alcohol under solvent-free conditions. A high yield 91% obtained following optimal conditions: molar ratio alcohol: (1:3.7), loading (15.7 mg), reaction temperature (98 °C), time (219 min). outstanding advantages this protocol are use inexpensive, naturally occurring easily prepared material having appropriate thermal stability without any modifications using hazardous reagents, lower temperature, no corrosive Bronsted acids well toxic azeotropic solvents or water adsorbents, simplicity procedure.

Language: Английский

Citations

4
Electrospinning of biocomposites reinforced with nanoclay and their applications in biomedical domains DOI
Roham Ghanbari, Ehsan Nazarzadeh Zare‬

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 325 - 348

Published: Jan. 1, 2024

Language: Английский

Citations

1