Heteropolyacides as green and reusable catalysts for the synthesis of [3,4-&lt;i&gt;b&lt;/i&gt;][1,3,4] thiadiazines

Hakimi, Fatemeh; Hassanabadi, Alireza; Tabatabaee, Masoumeh; Heravi, Majid M.

doi:10.4314/bcse.v28i1.8

Cited by 8 publications

(6 citation statements)

References 30 publications

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“…In addition, some attempts have been made to use sensitizers on the surface of photocatalyst or couple with other semiconductors in order to modify the physiochemical and electronic properties of photocatalyst (Marcì, García-López & Palmisano, 2014). Heteropoly acids (HPA), as green and eco-friendly catalysts, have been proposed as potential candidates to be used as surface modifiers of TiO 2 intended for photocatalytic degradation (Hakimi et al, 2014; Li, Vorontsov & Jing, 2015). The compound catalyst could eliminate the difficulties for recycling heteropoly acids and prevent the recombination of hole-electron pairs for both catalysts when heteropoly acids were carried on semiconductors such as TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

An overview report on the application of heteropoly acids on supporting materials in the photocatalytic degradation of organic pollutants from aqueous solutions

Nikoonahad

Djahed

Norzaee

et al. 2018

PeerJ

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Organic pollutants contaminate water resources and the environment when discharged into water streams. Also, the presence of these materials in incompletely treated or untreated wastewater leads to serious environmental hazards. The hydroxyl radicals and holes are regarded as the most oxidant species in the degradation of organic pollutants using the studied composites. The results of this review show that heteropoly acids on supporting materials could be considered as appropriate photocatalysts in the removal of organic pollutant from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

An overview report on the application of heteropoly acids on supporting materials in the photocatalytic degradation of organic pollutants from aqueous solutions

Nikoonahad

Djahed

Norzaee

et al. 2018

PeerJ

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“…One of the most important advantages of heterogeneous catalysis over the homogeneous counterpart is the possibility of reusing the catalyst by simple filtration, without loss of activity [38][39][40]. We have studied the recyclability and reusability of the catalyst.…”

Section: Resultsmentioning

confidence: 99%

Succinimide-N-sulfonic acid as an efficient recyclable catalyst for the synthesis of some fused indolo pyrano pyrimidinone derivatives

Mansoor¹,

Logaiya²,

Sudhan³

et al. 2015

Bull. Chem. Soc. Eth.

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ABSTRACT.A new, simple, thermally efficient and solvent-free condensation of 2-amino-4,5-dihydro-4-phenylpyrano[3,2-b]indole-3-carbonitrile derivatives with coumarin-3-carboxylic acid employing succinimide-Nsulfonic acid (SuSA) as catalyst for the synthesis of a series of 5,6-dihydro-2-(2-oxo-2H-chromen-3-yl)-5-phenylindolo[2',3':5,6]pyrano[2,3-d]pyrimidin-4(3H)-one derivatives is described. This method has the advantages of high yield, simple methodology, and short reaction time, as well as being green in terms of avoiding the use of toxic catalysts and solvents. Furthermore, the catalyst could be recycled and reused four times without significant loss of activity. Thiourea dioxide (TUD) catalyzed efficient three-component coupling reactions of aromatic aldehydes, 3-hydroxyindole and malononitrile in water at 70 ºC was described as the preparation of 2-amino-4,5-dihydro-4-phenylpyrano[3,2-b]indole-3-carbonitrile derivatives.

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“…It was reported that H 3 PW 12 O 40 was used both in bulk and supported on silica as a catalyst in a reaction involving 2-aminobenzenethiols (1 mmol), acetylenic esters (1 mmol), malonate esters (3 mmol), and HPA (0.1 mmol or 100 mg of supported HPA) in i-PrOH (3 mL) at 50 • C for 7 h. In total, 11 compounds were obtained with yields of 81 to 92% (Scheme 40). Hakimi et al [129] studied the synthesis of [3,4- Gharib et al [132] presented the synthesis of polysubstituted quinolines in the presence of silica-supported Preyssler nanoparticles, H 14 [NaP 5 W 30 O 110 ]/SiO 2 (SiO 2 /P 5 W 30 ). A mixture of 2-aminoaryl ketone (1.0 mmol), α-methylene ketone (1 mmol) and heteropolyacid as catalyst (0.05 mmol) and water (1.0 mL) was refluxed for 2 h. In these conditions 29 substituted quinolines were obtained with yields of 89 to 96% (Scheme 44).…”

Section: Diazinesmentioning

confidence: 99%

Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020

et al. 2021

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Over the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they have very strong Bronsted acidity, approaching the region of a superacid, and second, they are efficient oxidizers that exhibit rapid redox transformations under fairly mild conditions. Their structural mobility is also highlighted, since they are complex molecules that can be modified by changing their structure or the elements that compose them to model their size, charge density, redox potentials, acidity, and solubility. Finally, they can be used in substoichiometric amounts and reused without an appreciable loss of catalytic activity, all of which postulate them as versatile, economic and ecological catalysts. Therefore, in 2009, we wrote a review article highlighting the great variety of organic reactions, mainly in the area of the synthesis of bioactive heterocycles in which they can be used, and this new review completes that article with the contributions made in the same area for the period 2010 to 2020. The synthesized heterocycles to be covered include pyrimidines, pyridines, pyrroles, indoles, chromenes, xanthenes, pyrans, azlactones, azoles, diazines, azepines, flavones, and formylchromones, among others.

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Heteropolyacides as green and reusable catalysts for the synthesis of [3,4-<i>b</i>][1,3,4] thiadiazines

Cited by 8 publications

References 30 publications

An overview report on the application of heteropoly acids on supporting materials in the photocatalytic degradation of organic pollutants from aqueous solutions

An overview report on the application of heteropoly acids on supporting materials in the photocatalytic degradation of organic pollutants from aqueous solutions

Succinimide-N-sulfonic acid as an efficient recyclable catalyst for the synthesis of some fused indolo pyrano pyrimidinone derivatives

Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020

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