One-pot synthesis of polyhydropyridine derivatives via Hantzsch four component condensation in water medium: Use of a recyclable Lewis acid [Ce(SO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;.4H&lt;sub&gt;2&lt;/sub&gt;O] catalyst

Mosaddegh, Elaheh; Hassankhani, Asadollah

doi:10.4314/bcse.v26i3.16

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…Compounds of rare-earth elements with tetrahedral anions attract researchers’ attention as they exhibit many interesting properties. − In recent years, more and more attention is paid to simple and complex sulfates as functional materials. Among them are phosphors, − catalysts, − and gas adsorbents. − The decisive aspects of the functionalization of rare-earth sulfates are such issues as polymorphism, isomorphism, and crystal-chemical transformations in the technological processes. − …”

Section: Introductionmentioning

confidence: 99%

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)

Denisenko,

Molokeev,

Jiang

et al. 2023

Inorg. Chem.

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New polymorphic modifications of double sulfates β-AEu(SO4)2 (A–Rb+, Cs+) were obtained by the hydrothermal method, the structure of which differs significantly from the monoclinic modifications obtained earlier by solid-state methods. According to single-crystal diffraction data, it was found that the compounds crystallize in the orthorhombic system, space group Pnna, with parameters β-RbEu(SO4)2: a = 9.4667(4) Å, b = 13.0786(5) Å, c = 5.3760(2) Å, V = 665.61(5) Å3; β-CsEu(SO4)2: a = 9.5278(5) Å, b = 13.8385(7) Å, c = 5.3783(3) Å, V = 709.13(7) Å3. The asymmetric part of the unit cell contains one-half Rb+/Cs+ ion, one-half Eu3+ ion, both in special sites, and one SO4 2– ion. Both compounds exhibit nonlinear negative thermal expansion. According to the X-ray structural analysis and theoretical calculations, the polarizing effect of the alkali metal ion has a decisive influence on the demonstration of this phenomenon. Experimental indirect band gaps of β-Rb and β-Cs are 4.05 and 4.11 eV, respectively, while the direct band gaps are 4.48 and 4.54 eV, respectively. The best agreement with theoretical calculations is obtained using the ABINIT package employing PAW pseudopotentials with hybrid PBE0 functional, while norm-conserving pseudopotentials used in the frame of CASTEP code and LCAO approach in the Crystal package gave worse agreement. The properties of alkali ions also significantly affect the luminescent properties of the compounds, which leads to a strong temperature dependence of the intensity of the 5D0 → 7F4 transition in β-CsEu(SO4)2 in contrast to much weaker dependence of this kind in β-RbEu(SO4)2.

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Section: Introductionmentioning

confidence: 99%

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)

Denisenko,

Molokeev,

Jiang

et al. 2023

Inorg. Chem.

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“…Multi component reactions (MCRs) allow the creation of several bonds in a single operation and are attracting increasing attention as one of the most powerful emerging synthetic tools for the creation of molecular diversity and complexity [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and in vitro antimicrobial evaluation of 5-amino-7-aryl-6-cyano-4H- pyrano[3,2,b]pyrrole derivatives catalyzed by reusable ZrOCl2•8H2O

Hussain¹,

Mansoor²,

Aswin³

et al. 2014

Bull. Chem. Soc. Eth.

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ABSTRACT. An efficient synthesis of a new series of 5-amino-7-aryl-6-cyano-4H-pyrano[3,2-b]pyrrole derivatives from the reaction of 3-hydroxypyrrole, malononitrile, and various aromatic aldehydes using ZrOCl2·8H2O, an environmentally friendly catalyst under a thermal solvent-free green procedure is described. This simple protocol offer advantages such as shorter reaction times, simple work-up and excellent yield. The catalyst ZrOCl2·8H2O can be reused. The reusability of the catalyst has been studied for the synthesis of 5-amino-7-aryl-6-cyano-4H-pyrano[3,2-b]pyrrole. All the compounds were screened for their antibacterial and antifungal activity.

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“…We have also reported the application of TUD for the synthesis of 3,4-dihydropyrano[c]chromenes and 6-amino-5-cyano-4-aryl-2-methyl-4H-pyrans in water [26]. Multicomponent reactions (MCRs) allow the creation of several bonds in a single operation and are attracting increasing attention as one of the most powerful emerging synthetic tools for the creation of molecular diversity and complexity [32][33][34].…”

Section: Introductionmentioning

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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One-pot synthesis of polyhydropyridine derivatives via Hantzsch four component condensation in water medium: Use of a recyclable Lewis acid [Ce(SO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O] catalyst

Cited by 13 publications

References 18 publications

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)

Synthesis and <i>in vitro</i> antimicrobial evaluation of 5-amino-7-aryl-6-cyano-4<i>H</i>- pyrano[3,2,<i>b</i>]pyrrole derivatives catalyzed by reusable ZrOCl<sub>2</sub>•8H<sub>2</sub>O

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

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One-pot synthesis of polyhydropyridine derivatives via Hantzsch four component condensation in water medium: Use of a recyclable Lewis acid [Ce(SO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O] catalyst

Cited by 13 publications

References 18 publications

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO4)2 (A–Rb+, Cs+)

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO4)2 (A–Rb+, Cs+)

Synthesis and <i>in vitro</i> antimicrobial evaluation of 5-amino-7-aryl-6-cyano-4<i>H</i>- pyrano[3,2,<i>b</i>]pyrrole derivatives catalyzed by reusable ZrOCl<sub>2</sub>•8H<sub>2</sub>O

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

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Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)

Negative Thermal Expansion in the Polymorphic Modification of Double Sulfate β-AEu(SO₄)₂ (A–Rb⁺, Cs⁺)