Magnetic Fe-C-O-Mo alloy nano-rods prepared from chemical decomposition of a screw (a top-down approach): An efficient and cheap catalyst for the preparation of dihydropyridine and dihydropyrimidone derivatives

Wu, Pei Ying; Feng, Li; Liang, Yicong; Zhang, Xia; Mahmoudi, Boshra; Kazemnejadi, Milad

doi:10.1016/j.apcata.2019.117301

Cited by 19 publications

(10 citation statements)

References 47 publications

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“…Reaction conditions: Benzaldehyde (2 mmol), ethylacetoacetate (2 mmol), urea (2.4 mmol), acetonitrile (25 ml), temperature 80 °C and reaction time 7 h. M.P. of compounds: 1 : 230–232 (233–235) [111] 2 : 214–216 (215–216) [110] 3 : 214–217 (215–216) [112] 4 : 200–203 (200–201) [112] 5 : 176–180 (177–179) [111] 6 : 256–260(255–256) [113] 7 : 208–211 (210) [112] 8 : 226–230 (227–228) [112] 9 : 210–214 (213–214) [112] 10 : 183–185 (184–186) [114] 11 : 206–209 (206–208) [114] 12 : 202–204(204–205) [115] 13 : 203–206 (205–206) [112] 14 : 210–212 (210–211) [112] …”

Section: Resultsmentioning

confidence: 99%

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Chopda

Dave

2020

ChemistrySelect

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Fe(III) immobilized over natural bentonite (bent) using the impregnation method. Prepared catalysts were well characterized by XRD, FT-IR and FeSEM. The catalytic activity of three catalysts 10, 20 and 30 % Fe(III)/bent evaluated for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones known as Biginelli reaction. The catalyst 30 % Fe(III)/bent exhibited a high yield of the product towards the synthesis of a variety of dihydropyrimidones (DHPMs). The high yield of dihydropyrimidone (DHPM) was obtained in model reaction in ethanol, acetonitrile, DMF and solvent-free condition. The reusability test indicated that 6 % of yield of product decreased after 5 th cycle. Highlights * 10, 20 and 30 % Fe(III) were supported over bentonite clay. The catalysts are well characterized by (XRD), FT-IR, FeSEM and EDS. All charactization method showed that Fe supported over bentonite. * The used catalysts were screened for Biginelli reaction for synthesis dihydropyrimidones. * 30 % Fe(III)/bent exhibited high yield of product towards model Biginelli reaction between benzaldehyde, ethylacetoacetate and urea in ethanol. * 30 % Fe(III)/bent exhibited high yield of product in CH 3 CN, DMF and solvent free-condition. * The catalyst 30 % Fe(III)/bent applied for synthesis of variety of dihydropyrimodone in good yield in CH 3 CN. * Reusability studies show that no great decline in activity after 5 th cycle.

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Section: Resultsmentioning

confidence: 99%

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Chopda

Dave

2020

ChemistrySelect

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“…The catalyst represented very high recyclability and stability even aer eight consecutive runs with a negligible decrease in the efficiency without the sign of any metal leaching. 88 Chitosan is a bactericidal, biocompatible, eco-friendly natural material with notable surface modication potential owing to the presence of hydroxyl and amino functional groups on its structure. It has the capability to activate the reaction by means of hydrogen bonding and lone pairs.…”

Section: Magnetic Nanoparticles/functionalized Magnetic Nanoparticle-mentioning

confidence: 99%

Recent developments in the nanomaterial-catalyzed green synthesis of structurally diverse 1,4-dihydropyridines

Mathur¹,

Negi

Shrivastava

et al. 2021

RSC Adv.

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“…Wua and coworkers (Wu et al, 2020) developed a magnetic nanocatalytic alloy mediated by a wasted screw adopting the topdown method. The catalyst is an alloy combination of iron and molybdenum bridged by carbon and oxygen.…”

Section: Magnetic Nanocatalystsmentioning

confidence: 99%

Recent Progresses in the Multicomponent Synthesis of Dihydropyridines by Applying Sustainable Catalysts Under Green Conditions

et al. 2021

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The synthesis of dihydropyridines, valuable molecules with diverse therapeutic properties, using eco-friendly heterogeneous catalysts as a green alternative received significant consideration. By selecting appropriate precursors, these compounds can be readily modified to induce the desired properties in the target product. This review focused on synthesising diverse dihydropyridine derivatives in single-pot reactions using magnetic, silica, and zirconium-based heterogeneous catalytic systems. The monograph describes preparation techniques for various catalyst materials in detail. It covers facile and benign magnetic, silica, zirconium-based, and ionic liquid catalysts, exhibiting significant efficacy and consistently facilitating excellent yields in short reaction times and in a cost-effective way. Most of the designated protocols employ Hantzsch reactions involving substituted aldehydes, active methylene compounds, and ammonium acetate. These reactions presumably follow Knoevenagel condensation followed by Michael addition and intra-molecular cyclisation. The multicomponent one-pot protocols using green catalysts and solvents have admirably increased the product selectivity and yields while minimising the reaction time. These sustainable catalyst materials retain their viability for several cycles reducing the expenditure are eco-friendly.

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Magnetic Fe-C-O-Mo alloy nano-rods prepared from chemical decomposition of a screw (a top-down approach): An efficient and cheap catalyst for the preparation of dihydropyridine and dihydropyrimidone derivatives

Cited by 19 publications

References 47 publications

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Fe(III)/Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones

Recent developments in the nanomaterial-catalyzed green synthesis of structurally diverse 1,4-dihydropyridines

Recent Progresses in the Multicomponent Synthesis of Dihydropyridines by Applying Sustainable Catalysts Under Green Conditions

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