A Novel Biopolymer-based Nanomagnetic Catalyst for the Synthesis of 4H-pyran and Tetrahydro-4H-chromene Derivatives

Mohammadzadeh, Ali; Marjani, Ahmad Poursattar; Zamani, Asghar

doi:10.17159/0379-4350/2020/v73a9

Cited by 22 publications

(9 citation statements)

References 11 publications

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“…The obtained gelatinized starch was reacted with FeCl 3 ·6H 2 O, and FeSO 4 ·7H 2 O in H 2 O at room temperature, and then mixed with NH 3 dropwise to give the Fe 3 O 4 @starch nanocatalyst, which was treated with AgNO 3 (aq) to generate the magnetic Ag/Fe 3 O 4 @starch 115 nanocatalyst ( Scheme 36 ). 67 …”

Section: Synthesis Of Various Magnetic Bio Polymersmentioning

confidence: 99%

“…The obtained gelatinized starch was reacted with FeCl 3 $6H 2 O, and FeSO 4 $7H 2 O in H 2 O at room temperature, and then mixed with NH 3 dropwise to give the Fe 3 O 4 @starch nanocatalyst, which was treated with AgNO 3 (aq) to generate the magnetic Ag/Fe 3 O 4 @starch 115 nanocatalyst (Scheme 36). 67 The catalytic activity of Ag/Fe 3 O 4 @starch as Lewis acid 115 was evaluated in the one-pot reaction of benzaldehydes 19, malononitrile 14, and dimedone 64 in EtOH for the synthesis of 4H-pyran 116 (Scheme 37). Also, the magnetic nanocatalyst was reused ve times with no loss in its activities.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the magnetic nanocatalyst was reused ve times with no loss in its activities. 67 2.3.2. Synthesis and application of magnetic CuFe 2 O 4 @starch.…”

Section: Introductionmentioning

confidence: 99%

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Recent advances in the application of magnetic bio-polymers as catalysts in multicomponent reactions

et al. 2022

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Section: Synthesis Of Various Magnetic Bio Polymersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent advances in the application of magnetic bio-polymers as catalysts in multicomponent reactions

et al. 2022

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“…Also, the synthesis was performed in room temperature condition in comparsion with other reports. [30][31][32][34][35]…”

Section: S C H E M E 3 the Model Reaction For The Optimization Of The Reaction Conditionsmentioning

confidence: 99%

Metformin functionalized dendritic fibrous nanosilica (KCC‐1‐nPr‐Met) as an innovative and green nanocatalyst for the efficient synthesis of tetrahydro‐4H‐chromene derivatives

Rad

Shadjou

2021

J of Molecular Recognition

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An innovative nanocatalyst (KCC-1-nPr-Met) has been prepared from the covalent attachment of metformin on the channels and the pores of n-propyl amine functionalized dendritic fibrous nanosilica (DFNS) and used towards efficient, green, and high yield synthesis of tetrahydro-4H-chromenes derivatives by onepot three-component reaction of aromatic aldehydes, malononitrile, and dimedone in H 2 O-EtOH at room temperature. The designed nanocatalyst has been characterized by energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and adsorption/desorption analysis (BET) techniques. Also, field emission scanning electron microscopy (FE-SEM) was used to study the morphology of prepared nanocatalyst. The engineered nanocatalyst with uniform fibrous spheres has dendritic structure, high pore volume (0.35 cm 3 /g), and great surface area (178 m 2 /g). Hence, the specific dendritic structure of the prepared nanocatalyst not only improve the diffusion ability of the reactants and products, but also, increase the availability of dynamic sites in the pores and channels of the catalyst. According to the obtained results, a unique strategy was proposed towards the synthesis of important biologically active scaffolds in the presence of nontoxic and environmental friendly nanocatalyst and media. Milder reaction conditions (room temperature), shorter reaction times (5-30 minutes), excellent yields (92%-98%) of the products with higher purity, very simple workup procedure, and using of EtOH: H 2 O as a green solvent are the advantages of the presented work.

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“…Also some reaction protocols have applied for the synthesis of tetrahydro-4H-chromenes with the use of nano catalysts such as 4-Dialkylaminopyridine modified magnetic nanoparticles, [40]silica-supported magnetic nanocatalyst, [41]nano-Fe3O4, [42]Nano-SiO2, [43]Biopolymerbased Nanomagnetic Catalyst [44]and Nano-coconut Shell-BF3 [45].…”

Section: Introductionmentioning

confidence: 99%

Ag2O/GO/TiO2 Composite Nanostructure: An Efficient Heterogeneous Catalyst for one Pot Synthesis of Bis (Dihydropyrimidinone) and Tetrahydro-4H-chromenes Derivatives

Zadeh

Mohammadi

Rayatzadeh

et al. 2020

Preprint

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The simple and efficient synthesis reaction was used for preparing Bis (dihydropyrimidinone) derivatives through Biginelli condensation reaction of terephthalic aldehyde, 1, 3-dicarbonyl compounds and (thio) urea or guanidine and tetrahydro-4H-chromenes via one pot condensation of aromatic aldehydes, malononitrile and dimedone with Ag2O/GO/TiO2 composite nanostructures as a catalyst. The structural functionalities and morphological observations of catalyst were obtained using characterization techniques of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transfer infrared (FT-IR) spectroscopy and transmission electron microscope (TEM). The structures of Bis (dihydropyrimidinone) and tetrahydro-4H-chromenes confirmed by FT- IR, NMR and mass spectroscopy. Excellent yields of the products, simple reaction process and simple work-up are attractive features of these effective synthesis methods.

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A Novel Biopolymer-based Nanomagnetic Catalyst for the Synthesis of 4H-pyran and Tetrahydro-4H-chromene Derivatives

Cited by 22 publications

References 11 publications

Recent advances in the application of magnetic bio-polymers as catalysts in multicomponent reactions

Recent advances in the application of magnetic bio-polymers as catalysts in multicomponent reactions

Metformin functionalized dendritic fibrous nanosilica (KCC‐1‐nPr‐Met) as an innovative and green nanocatalyst for the efficient synthesis of tetrahydro‐4H‐chromene derivatives

Ag2O/GO/TiO2 Composite Nanostructure: An Efficient Heterogeneous Catalyst for one Pot Synthesis of Bis (Dihydropyrimidinone) and Tetrahydro-4H-chromenes Derivatives

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