201989-30-2

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Relevant academic research and scientific papers

Stable room temperature magnetic ordering and excellent catalytic activity of mechanically activated high surface area nanosized Ni0.45Zn0.55Fe2O4

Herein we report the structural, microstructural, dc magnetic and hyperfine properties along with catalytic activity of mechanosynthesized nanosized Ni0.45Zn0.55Fe2O4 (～12 nm). The Rietveld refinement of the pow

Polymer-supported 4-aminoformoyldiphenylammonium triflate (PS-AFDPAT): An effective and recyclable catalyst for the Biginelli reaction

Polymer-supported 4-aminoformoyldiphenylammonium triflate (PS-AFDPAT) was used as an effective catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)- ones (DHPMs) via the Biginelli reaction. This immobilized catalyst could be easily recovered by simple

Keggin and Dawson-type polyoxometalates as efficient catalysts for the synthesis of 3,4-dihydropyrimidinones: Experimental and theoretical studies

3,4-Dihydropyrimidinones were synthesized by a multicomponent condensation of an aldehyde, a β-keto ester, and urea, in acetonitrile and ethanol using Keggin and Dawson type polyoxometalates as catalysts. Keggin heteropolyacid, H4SiMO12/s

Eosin Y photocatalyzed access to Biginelli reaction using primary alcohols via domino multicomponent cascade: an approach towards sustainable synthesis of 3,4-dihydropyrimidin-2(1H)-ones

The Eosin Y photocatalyzed Biginelli protocol has been established by a cascade one-pot three-component reaction of primary alcohols, α-ketoester, and urea to provide pharmacologically promising 3,4-dihydropyrimidin-2(1H)-ones in high yields. The key benefits of the present scheme are the capability to allow operational simplicity, readily available substrates, straightforward workup and high yields. This Eosin Y based photocatalytic approach can permit conquering traditional metal-catalyzed reactions in a sustainable manner, thus delivering economic and environmental rewards. Graphical abstract: An environmentally benign protocol for the synthesis of 3,4-DHPMs has been developed using inexpensive molecular oxygen, visible light as green energy source and eosin Y as photoreceptor-cum-sensitizer. The utilized photoreceptor revealed its unique properties in rapid intersystem crossing, high photo and chemical stability, ease of separation and high catalytic efficiency.[Figure not available: see fulltext.].

Fabrication of porous ultrathin carbon nitride nanosheet catalysts with enhanced photocatalytic activity for N- And O-heterocyclic compound synthesis

A simple and efficient photocatalytic method for the synthesis of dihydropyrimidinones (DHPMs) and their derivatives via porous ultrathin carbon nitride nanosheets (p-CNNs) without solvents was demonstrated. The yields of 3,4-dihydropyrimidin-2(1H)-ones/t

Synthesis and Evaluation of Dihydropyrimidinones and Their Derivatives against Meloidogyne incognita

3,4-Dihydropyrimidin-2-ones (DHPMs) were synthesized in good yield using ammonium molybdate as a catalyst under different reaction conditions through ultrasonication technique. Dehydrogenated derivatives of DHPMs, that is, pyrimidin-2-ones were synthesize

Air-stable zirconium (IV)-salophen perfluorooctanesulfonate as a highly efficient and reusable catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones under solvent-free conditions

An air-stable complex of zirconium (IV)-salophen perfluorooctanesulfonate (1) was successfully synthesized by reacting Zr (salphen)Cl2 and C8F17SO3Ag. Complex 1 was characterized and studied by different techniq

Recyclable triphenylbismuth (V) bisperfluorooctanesulfonate catalyzed synthesis of dihydropyrimidinones

– Triphenylbismuth(V) bisperfluorooctanesulfonate Ph3Bi(OSO2C8F17)2 was successfully synthesized by treatment of Ph3BiCl2 with C8Fl7SO2OAg, and was found to have the nature of air-stability, water tolerance, high thermal stability and strong Lewis acidity

Niobium Oxides as Heterogeneous Catalysts for Biginelli Multicomponent Reaction

This study reports a simple, reusable, and recoverable niobium-based heterogeneous catalysts for Biginelli multicomponent reactions. Different methods of catalysts preparation were investigated. For this purpose, HY-340 (Nb2O5·nH2O) and Nb2O5 were chemica

A highly efficient one-pot multicomponent synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones catalyzed by strontium pyroarsenate nano-plates

The present work describes the one-pot multicomponent synthesis of heterocyclic 3,4-dihydropyrimidin-2-(1H)-ones and thiones (DHPMs) under solvent-free conditions by Sr2As2O7 nanocatalyst. Sr2As2Osub