Facile synthesis of tetrazolo[1,5-a]pyrimidine with the aid of an effective gallic acid nanomagnetic catalyst

Maleki, Ali; Niksefat, Maryam; Rahimi, Jamal; Azadegan, Sepide

doi:10.1016/j.poly.2019.04.015

Cited by 58 publications

(33 citation statements)

References 31 publications

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“…Despite the good characteristics of the photocatalyst in water treatment, the lack of appropriate recovery of TiO 2 nanocomposites from treated water is a major problem when it comes to applying extensively. To overcome the problem of recovering catalytic nanoparticles from water, magnetic catalysts have been focused (Maleki and Kamalzare, 2014;Maleki et al, 2015;Maleki et al, 2016a;Maleki et al, 2016b;Maleki et al, 2017;Maleki et al, 2019b;Maleki et al, 2019c;Maleki et al, 2019a;Maleki et al, 2019d). After the water treatment process, the magnetic separation of Fe 3 O 4 /TiO 2 by using an external electromagnetic field recycles magnetic composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

et al. 2020

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The new nanocomposite with various molar ratios along with magnetic properties was fabricated via precipitation (assisted by ultrasonic) procedure. The photocatalytic effects of methylene blue (∼90% degradation for optimized sample in 100 min) for finding the optimized sample performed under visible light irradiation. Moreover, the photo-antibacterial impacts of bacteria culture environments were found with an optimized sample that had effective destruction of bacteria in comparison to control group. The cytotoxicity properties of panc1 cells and magnetic behaviors of the obtained nanomaterials were evaluated and its IC50 was about 500 mg/L. As an initial step, the structural, morphological and magnetic characteristics of the fabricated nanocomposites were evaluated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) and MAP, UV-visible diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometry (VSM) approaches. Based on SEM results, the size of nanoparticles in fabricated nanocomposite was nearly 50-70 nm for Fe 3 O 4 /SiO 2 /TiO 2 and 80-100 nm for Fe 3 O 4 /SiO 2 /TiO 2 /CeVO 4 . XRD results showed that desired nanocomposites were truly synthesized without any impurities.

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Section: Introductionmentioning

confidence: 99%

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

et al. 2020

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“…used as analgesic, herbicidal, anti-HIV drug candidate, anti-proliferative, anti-inflammatory, antimicrobial, and anticancer agents. [44,[58][59][60][61][62][63][64][65][66][67] In this regard, TAK-456, olmesartan medoxomil, losartan and valsartan which are compounds possessing tetrazole ring have a biological activity such as antihypertensive family drugs. [63,68] Therefore, we developed a simple catalytic procedure for the synthesis of pyranopyrazole and tetrazole derivatives.…”

Section: Introductionmentioning

confidence: 99%

Copper and nickel immobilized on cytosine@MCM‐41: as highly efficient, reusable and organic–inorganic hybrid nanocatalysts for the homoselective synthesis of tetrazoles and pyranopyrazoles

Nikoorazm

Tahmasbi

Gholami

et al. 2020

Applied Organom Chemis

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In this work, a green approach is reported for efficient synthesis of biologically active tetrazole and pyranopyrazole derivatives in the presence of Cu-Cytosine@MCM-41 and Ni-Cytosine@MCM-41 (copper (II) and nickel (II) catalyst on the modified MCM-41 using cytosine). The synthesis of tetrazoles and pyranopyrazoles in the presence of these catalysts was performed in green solvents such as water or poly (ethylene glycol) (PEG). All products were obtained in high TOF (turnover frequency) numbers in the presence of these catalysts, which indicate the high efficiency of these catalysts in the synthesis of tetrazole and pyranopyrazole derivatives. The prepared catalysts were characterized by various techniques such as BET, TGA, XRD, FT-IR, SEM, EDS, WDX, TEM, and AAS. Mesoporous structure of these catalysts was confirmed by nitrogen adsorptiondesorption isotherms. These catalysts can be recovered and reused for several runs without significant change in their catalytic activity or metal capacity. The recovered catalysts have been characterized by XRD, SEM, EDS, WDX, FT-IR and AAS techniques, by which their heterogeneous nature has been confirmed. K E Y W O R D S copper (II), mesoporous MCM-41, nickel (II), pyranopyrazoles, tetrazoles

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“…[18] Magnetic nanoparticles as support for ionic liquids and catalytic species have been extensively studied owing to their significant properties such as high surface areas to volume ratio, ease of availability, simple separation from the reaction mixture by an external magnet and excellent chemical and thermal stabilities. [19] Fe 3 O 4 -based magnetic nanocatalysts have been extensively applied in various organic reaction such as Diels-Alder reaction, [20] synthesis cyclopropanes, [21] chromenes, [22] tetrazolo[1,5-a]pyrimidine, [23] α-aminonitriles [24] and indenoquinoline. [25] In continuation of our goals of the research reported to develop new catalysts for organic transformations, [26] in this paper, the potential application of the Fe 3 O 4 @SiO 2 -EPIM was employed as catalyst for synthesis of trisubstituted imidazoles in polyethylene glycol 200 under mild reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Imidazolium‐Based Ionic Liquid on Modified Magnetic Nanoparticles for Application in One‐Pot Synthesis of Trisubstituted Imidazoles

2020

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The core-shell of Fe 3 O 4 @SiO 2 modified by epichlorohydrin and 1-methyl-imidazole (Fe 3 O 4 @SiO 2-EPIM), a new green recyclable nanocatalyst, was designed and prepared. This nanocatalyst was characterized using fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), elemental mapping technique, transmission electron microscopy (TEM), X-ray diffraction (XRD) techniques, thermal gravimetric analysis (TGA), N 2 adsorption-desorption by Brunauer-Emmet-Teller (BET) and vibrating sample magnetometer (VSM). The catalytic activity of Fe 3 O 4 @SiO 2-EPIM was assessed for synthesis of trisubstituted imidazoles via one-pot condensation reactions of benzil, aldehyde and ammonium acetate under the optimal reaction condition (PEG 200, 100°C, 0.02 g catalyst). This nanocatalyst displayed remarkable superiorities, such as environmental friendliness, shorter reaction time, excellent yields, reusability of the catalyst and simple workup procedure.

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Facile synthesis of tetrazolo[1,5-a]pyrimidine with the aid of an effective gallic acid nanomagnetic catalyst

Cited by 58 publications

References 31 publications

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

Preparation of Fe3O4/SiO2/TiO2/CeVO4 Nanocomposites: Investigation of Photocatalytic Effects on Organic Pollutants, Bacterial Environments, and New Potential Therapeutic Candidate Against Cancer Cells

Copper and nickel immobilized on cytosine@MCM‐41: as highly efficient, reusable and organic–inorganic hybrid nanocatalysts for the homoselective synthesis of tetrazoles and pyranopyrazoles

Synthesis of Imidazolium‐Based Ionic Liquid on Modified Magnetic Nanoparticles for Application in One‐Pot Synthesis of Trisubstituted Imidazoles

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