4-Dialkylaminopyridine modified magnetic nanoparticles: as an efficient nano-organocatalyst for one-pot synthesis of 2-amino-4H-chromene-3-carbonitrile derivatives in water

Dangolani, Soheila Khajeh; Panahi, Farhad; Nourisefat, Maryam; Khalafi-Nezhad, Ali

doi:10.1039/c6ra18078g

Cited by 33 publications

(9 citation statements)

References 93 publications

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“…The authors declare no conflict of interest. [14] 2 F e 3 O 4 @SiO 2 @BenzIm-Fc[Cl]/NiCl 2 EtOH: H 2 O (4:2) 95 [15] 3 [ H 2 -DABCO][H 2 PO 4 ] 2 EtOH: H 2 O (2:1) 90 [16] 4 RHPrBPCl nanocomposite H 2 O 9 0 [18] 5 Glutamic acid EtOH 90 [19] 6 CaHPO 4 EtOH: H 2 O (1:4) 91 [22] 8 EtOH: H 2 O (2:1) 95 [16] 2 DAHP EtOH: H 2 O (1:1) 81 [17] 3 L-Proline EtOH: H 2 O (1:1) 80 [21] 4 CaHPO 4 EtOH: H 2 O (1:4) 89 [22] 5…”

Section: Conflict Of Interestmentioning

confidence: 99%

“…Given this, a large number of catalysts were introduced for the three‐component synthesis of tetrahydrobenzo[ b ]pyran and pyrano[2,3‐ d ]‐pyrimidinone/thiones under multifarious catalytic circumstances. [ 9 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ] There are numerous catalysts derived from fruit extracts, and agro‐wastes have been utilized to synthesize various heterocycles. [ 35 , 36 , 37 , 38 , 39 ]…”

Section: Introductionmentioning

confidence: 99%

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WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[b]pyrans and pyrano[2,3‐d]pyrimidinones as inhibitors of SARS‐CoV‐2

Nesaragi

Kamble

Hoolageri

et al. 2021

Applied Organom Chemis

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Since 2019, the infection of SARS‐CoV‐2 has been spreading worldwide and caused potentially lethal health problems. In view of this, the present study explores the most commodious and environmentally benign synthetic protocol for the synthesis of tetrahydrobenzo[ b ]pyran and pyrano[2,3‐ d ]pyrimidinones as SARS‐CoV‐2 inhibitors via three‐component cycloaddition of aromatic aldehyde, malononitrile, and dimedone/barbituric acid in water. Lemon peel from juice factory waste, namely, lemon ( Citrus limon ), sweet lemon ( C. limetta ), and Kaffir lime or Citron ( C. hystrix ), effectually utilized to obtain WELPSA, WESLPSA, and WEKLPSA, respectively, for the synthesis of title compounds. The catalyst was characterized by scanning electron microscope (SEM) and energy‐dispersive x‐ray spectroscopy (EDX). The concentration of sodium, potassium, calcium, and magnesium in the catalyst (WELPSA) was determined using atomic absorption spectrometry (AAS). The current approach manifests numerous notable advantages that include ease of preparation, handling and benignity of the catalyst, low cost, green reaction conditions, facile workup, excellent yields (93%–97%) with extreme purity, and recyclability of the catalyst. Compounds were docked on the crystal structure of SARS‐CoV‐2 (PDB: 6M3M). The consensus score obtained in the range 2.47–4.63 suggests that docking study was optimistic indicating the summary of all forces of interaction between ligands and the protein.

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Section: Conflict Of Interestmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[b]pyrans and pyrano[2,3‐d]pyrimidinones as inhibitors of SARS‐CoV‐2

Nesaragi

Kamble

Hoolageri

et al. 2021

Applied Organom Chemis

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“…It has several advantages over the reported studies which can be seen in table 2. The superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized using a co-precipitation method described before 55,56 were dissolved in deionized water (20 mL) under an inert atmosphere to get a homogenous solution.…”

Section: Catalyst Recyclabilitymentioning

confidence: 99%

Collagen-Coated Superparamagnetic Iron Oxide Nanoparticles as a Sustainable Catalyst for Spirooxindole Synthesis

Ghanbari

Esmkhani

Javanshir

2021

Preprint

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In this work, a novel magnetic organic-inorganic hybrid catalyst was fabricated by encapsulating magnetite@silica (Fe3O4@SiO2) nanoparticles with Isinglass protein collagen (IGPC) using epichlorohydrin (ECH) as crosslinking agent. Characterization studies of the prepared particles were accomplished by various analytical techniques specifically, Fourier transform infrared (FTIR) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), and Brunauer−Emmett−Teller (BET) analysis. The XRD results showed a crystalline and amorphous phase which contribute to magnetite and isinglass respectively. Moreover, the formation of the core/shell structure had been confirmed by TEM images. The synthesized Fe3O4@SiO2/ECH/IG was applied as bifunctional heterogeneous catalyst in the synthesis of spirooxindole derivatives demonstrating excellent catalytic properties, stability and recyclability.

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“…Magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) and mixed ferrites (MFe 2 O 4 where M=Co, Mn, Ni, or Zn) are the three main forms of iron oxide-based nanoparticles 13 – 16 . To prevent the aggregation of MNPs and also enhancement their stability of them, usually, a layer of silica is coated on the surface 17 . Fe 3 O 4 coated with silica was often used as the support of metal and nonmetal catalysts 18 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Design, preparation and application of the semicarbazide-pyridoyl-sulfonic acid-based nanocatalyst for the synthesis of pyranopyrazoles

Beiranvand

Habibi

2022

Sci Rep

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A novel, efficient, and recoverable nanomagnetic catalyst bearing the semicarbazide linkers, namely, Fe3O4@SiO2@OSi(CH2)3-N(3-pyridoyl sulfonic acid)semicarbazide (FSiPSS) was designed, synthesized and characterized by the use of various techniques such as FT‐IR, EDX, elemental mapping analysis, XRD, SEM, TEM, TGA/DTA, BET, and VSM. Then, the catalytic capability of the novel prepared nanomagnetic FSiPSS catalyst was successfully investigated in the synthesis of diverse pyranopyrazoles through a one-pot four-component condensation reaction of ethyl acetoacetate, hydrazine hydrate, aromatic aldehydes, and malononitrile or ethyl cyano-acetate by the help of ultrasonication in very short reaction time, good to high yields and easy work-up (Fig. 1).

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4-Dialkylaminopyridine modified magnetic nanoparticles: as an efficient nano-organocatalyst for one-pot synthesis of 2-amino-4H-chromene-3-carbonitrile derivatives in water

Abstract: A new DMAP-based magnetic nano-organocatalyst was developed for efficient one-pot synthesis of 2-amino-4H-chromene-3-carbonitrile derivatives in water as a green solvent.

Cited by 33 publications

References 93 publications

WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[b]pyrans and pyrano[2,3‐d]pyrimidinones as inhibitors of SARS‐CoV‐2

WELPSA: A natural catalyst of alkali and alkaline earth metals for the facile synthesis of tetrahydrobenzo[b]pyrans and pyrano[2,3‐d]pyrimidinones as inhibitors of SARS‐CoV‐2

Collagen-Coated Superparamagnetic Iron Oxide Nanoparticles as a Sustainable Catalyst for Spirooxindole Synthesis

Design, preparation and application of the semicarbazide-pyridoyl-sulfonic acid-based nanocatalyst for the synthesis of pyranopyrazoles

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