ZnAl2O4 Nanoparticles as Efficient and Reusable Heterogeneous Catalyst for the Synthesis of 12-phenyl-8,12-dihydro-8,10-dimethyl-9H-naphtho[1′,2′:5,6] pyrano[2,3-d] pyrimidine-9,11-(10H)-diones Under Microwave Irradiation

Mohaqeq, Mahboubeh; Safaei‐Ghomi, Javad; Shahbazi‐Alavi, Hossein; Teymuri, Raheleh

doi:10.1080/10406638.2015.1088044

Cited by 12 publications

(8 citation statements)

References 22 publications

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“…A three‐component condensation process of aldehydes, β ‐naphthol, and 1,3‐dimethylbarbituric acid using catalyst ZnAl 2 O 4 nanoparticles was performed for the preparation of naphthopyranopyrimidines. The use of ZnAl 2 O 4 nanoparticles demonstrated strong recyclability of the catalyst with the rapid reaction in a short time [1]. ZnAl 2 O 4 nanoparticles synthesised by the co‐precipitation are employed as the heterogeneous catalysts in the acetylation reaction of amines, alcohols, and phenols.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications

Siragam¹,

Dubey²,

Pappula

2020

Micro & Nano Letters

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This Letter reports the synthesis of nanoceramic composite ZnAl 2 O 4 TiO 2 by using a cost-effective and straight forward sol-gel route. X-ray diffraction (XRD) showed the ZnAl 2 O 4 cubic structure along with the mixed anatase-and rutile-phases of TiO 2. Rietveld refinement is performed using XRD pattern to study the structural parameters. Raman investigation endorsed the corresponding vibration peaks of TiO 2 and ZnO. Field-emission scanning electron microscopy evidenced the agglomerated spherical nanoparticles. Energy-dispersive spectroscopy analysis demonstrated the elementary peaks of Zn, Al, and Ti at 4.5, 1.5, and 1 eV, respectively. LCR measurement revealed the decreased dielectric permittivity with the rise in frequency and temperature. This dielectric characteristic is attributed to the dipole movement of the charge carriers. Furthermore, the authors present the investigation of the conductivity and impedance of the prepared dielectric ceramic material.

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Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications

Siragam¹,

Dubey²,

Pappula

2020

Micro & Nano Letters

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“…In this study, microwave irradiation is utilized as a rapid procedure for the synthesis of dihydrofurans. The reaction is heated from the inside and the microwave energy is transmitted straightly to the substrates and catalyst [38,39]. The nanocatalysts absorb microwave irradiation, hence they can utilize as an internal heat origin for the reactions.…”

Section: Resultsmentioning

confidence: 99%

Ionic liquid attached to colloidal silica nanoparticles: as high performance catalyst for the preparation of dihydrofurans under microwave irradiation

2017

Self Cite

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The preparation of trans-dihydrofurans has been achieved by a one-pot condensation reaction of 4-bromophenacyl bromide, aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione using bis (1(3-trimethoxysilylpropyl)-3-methyl-imidazolium) copper tetrachloride tethered to colloidal silica nanoparticles under microwave irradiation. Ionic liquid tethered to colloidal silica nanoparticles have been characterized by H NMR spectroscopy, scanning electron microscope, energy dispersive spectroscopy, thermogravimetric analysis and dynamic light scattering.

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“…Compared to the above Cu-based NP-catalyzed reaction, in this reaction, the decreased reaction time and higher yield are the major merits of this reaction protocol. 77 synthesized novel analogues of 44a using the same substrates by utilizing heterogeneous catalyst, ZnAl 2 O 4 NPs (0.7 mol %), under microwave irradiation (MWI) of 500 W (Scheme 30). After reaction completion, the product 44a was isolated from the crude mixture.…”

Section: Copper-based Np-catalyzed Synthesismentioning

confidence: 99%

Importance of Hybrid Catalysts toward the Synthesis of 5H-Pyrano[2,3-d]pyrimidine-2-ones/2,4-diones (Thiones)

2023

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The pyranopyrimidine core is a key precursor for medicinal and pharmaceutical industries due to its broader synthetic applications as well as its bioavailability. Among its four possible isomers, we found that 5H-pyrano[2,3-d]pyrimidine scaffolds have a wide range of applicability, and in recent years, they have been intensively investigated, but the development of the main core is found to be more challenging due to its structural existence. In this review article, we cover all of the synthetic pathways that are employed for the development of substituted 4-aryl-octahydropyrano/hexahydrofuro[2,3-d]pyrimidin-2-one (thiones) and 5-aryl-substituted pyrano[2,3-d]pyrimidindione (2-thiones) derivatives through a one-pot multicomponent reaction using diversified hybrid catalysts such as organocatalysts, metal catalysts, ionic liquid catalysts, nanocatalysts, green solvents, catalyst-/solvent-free conditions, and miscellaneous catalysts as well as the mechanism and recyclability of the catalysts. This review mainly focuses on the application of hybrid catalysts (from 1992 to 2022) for the synthesis of 5H-pyrano[2,3-d]pyrimidine scaffolds. This review will definitely attract the world’s leading researchers to utilize broader catalytic applications for the development of lead molecules.

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ZnAl₂O₄ Nanoparticles as Efficient and Reusable Heterogeneous Catalyst for the Synthesis of 12-phenyl-8,12-dihydro-8,10-dimethyl-9H-naphtho[1′,2′:5,6] pyrano[2,3-d] pyrimidine-9,11-(10H)-diones Under Microwave Irradiation

Cited by 12 publications

References 22 publications

Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications

Synthesis and investigation of dielectric properties of nanoceramic composite material for microwave applications

Ionic liquid attached to colloidal silica nanoparticles: as high performance catalyst for the preparation of dihydrofurans under microwave irradiation

Importance of Hybrid Catalysts toward the Synthesis of 5H-Pyrano[2,3-d]pyrimidine-2-ones/2,4-diones (Thiones)

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