ChemInform Abstract: A New Solid Acid Catalyst FeCl<sub>3</sub>/Bentonite for Aldol Condensation under Solvent‐Free Condition.

Muthuvel, I.; Dineshkumar, S.; Thirumurthy, K.; Rajasri, S.; Thirunarayanan, Ganesamoorthy

doi:10.1002/chin.201626098

Cited by 5 publications

(5 citation statements)

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“…The corresponding d‐spacing is shown in Table no.1. The increased in d‐spacing signifies that Fe(III) incorporated into interlayer space of bentonite [100,101] by replacing of interlayer cations Na and Ca. The intense peak at 2θ=20.91 ° in raw bentonite attributes to its SiO 2 crystalline nature [102] .…”

Section: Resultsmentioning

confidence: 99%

“…FT‐IR spectra of raw bentonite and 10, 20 and 30 % Fe(III)/bent are shown in Figure 2. In the raw bentonite, a strong band at 1006.84 cm −1 corresponds to Si−O stretching vibrations and bending vibration of Al−Al−OH appears at 921 cm −1 [100,101,107] . Bands of Si−O−Al and Si−O−Si attribute between 521–800 cm −1 [108,109] .…”

Section: Resultsmentioning

confidence: 99%

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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%

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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“…A synthesis of chalcone from aryl methyl ketone and substituted benzaldehyde was realized in green catalyst fly ash: H2SO4 by microwave irradiation at 160-800 watt [20]. Another method assisted by microwave irradiation was reported [21]. In this method, a new solid acid catalyst (FeCl3/bentonite) has been used for the synthesis of aryl chalcones under solvent-free conditions.…”

Section: Green Synthesis Of Biologically Active Chalcones By Claisen-...mentioning

confidence: 99%

Green synthesis of biologically active chalcones by Claisen-Schmidt condensation under mild conditions

Chtourou¹,

Trabelsi²

2021

Japan J Res

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“…In this study, Fe 3+ present within S-GO is leached as ferric chloride (FeCl 3 ). The ferric chloride (FeCl 3 ) has promising catalytic abilities, then, it has been used as an acid catalyst in many processes [43,44]. The aqueous FeCl 3 solutions have the property to acidify the reactional medium, due to hydrolysis processes, since contact between FeCl 3 and H 2 O favors H + release.…”

Section: Leaching Experimentsmentioning

confidence: 99%

CO2 sequestration by pH-swing mineral carbonation based on HCl/NH4OH system using iron-rich lizardite 1T

Ferrufino

Okamoto

Santos

et al. 2018

Journal of CO2 Utilization

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In pH-swing mineral carbonation, several acid/base systems has been investigated. Currently the main acid/base systems employed are HCl/NaOH and NH 4 HSO 4 /NH 4 OH. However, the use of a HCl/NH 4 OH system was not yet elucidated. This study proposes to evaluate the feasibility of a pH-swing mineral carbonation based on HCl/ NH 4 OH system at atmospheric pressure and moderate temperatures using mining waste from asbestos production from Goiás State, Brazil (S-GO) for two conditions (i.e. stoichiometric conditions (T2E) and acid excess (T2)). Results indicated that the Fe 3+ content in S-GO acted as a catalyst, due to FeCl 3 hydrolysis in aqueous solutions. Thus, high Mg and Fe extraction efficiency (95 ± 2%), were achieved in the leaching stage for both conditions. The S 1 solid residue was mainly SiO 2 with 90 ± 1% purity content. In the purification stage 91.7 ± 1.9% of Fe t were removed, however, a loss of Mg of 13.6 ± 2.3% was also detected. On the carbonation stage, high purity hydromagnesite was formed in T2E; this stage had a 85% efficiency, thus, 36.7% of CO 2 was fixed. On T2, excess H 2 O and CO 2 promoted dypingite formation and reduced hydromagnesite formation. After carbonation, the formation of crystals was observed in the NH 4 Cl aqueous solution at 25°C, indicating NH 4 Cl supersaturation. The results of mass balance indicate that 4 ton of mineral waste will be employed for each ton of captured CO 2 , as well as 2.6 ton of HCl, and 4.5 ton of NH 4 OH. However, 1.7 ton of SiO 2 , 0.55 ton of iron oxides, and 2.7 ton of hydromagnesite could be produced.

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ChemInform Abstract: A New Solid Acid Catalyst FeCl₃/Bentonite for Aldol Condensation under Solvent‐Free Condition.

Abstract: A series of diarylpropenones is synthesized under microwave‐assisted solvent‐free conditions using FeCl3/bentonite as a stable acid catalyst system which can be reused several times without iron leaching.

Cited by 5 publications

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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

Green synthesis of biologically active chalcones by Claisen-Schmidt condensation under mild conditions

CO2 sequestration by pH-swing mineral carbonation based on HCl/NH4OH system using iron-rich lizardite 1T

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ChemInform Abstract: A New Solid Acid Catalyst FeCl3/Bentonite for Aldol Condensation under Solvent‐Free Condition.

Abstract: A series of diarylpropenones is synthesized under microwave‐assisted solvent‐free conditions using FeCl3/bentonite as a stable acid catalyst system which can be reused several times without iron leaching.

Cited by 5 publications

References 0 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

Green synthesis of biologically active chalcones by Claisen-Schmidt condensation under mild conditions

CO2 sequestration by pH-swing mineral carbonation based on HCl/NH4OH system using iron-rich lizardite 1T

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ChemInform Abstract: A New Solid Acid Catalyst FeCl₃/Bentonite for Aldol Condensation under Solvent‐Free Condition.