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Relevant academic research and scientific papers

Application of the ultrasound in the mild synthesis of substituted 2,3-dihydroquinazolin-4(1H)-ones catalyzed by heterogeneous metal-MWCNTs nanocomposites

A practical method were applied successfully to synthesize mono- and disubstituted dihydroquinazolinones through three-component condensation of isatoic anhydride, primary amines or ammonium acetate with aromatic aldehydes in the presence of some transiti

Synthesis of pyrazol-quinazolinones and 2,3-dihydroquinazolin-4(1H)-ones using CoAl2O4 nanoparticles as heterogeneous catalyst

Abstract: The preparation and characterization of cobalt aluminate (CoAl2O4) magnetic nanoparticles and its application as a catalyst for the synthesis of a novel class of pyrazol-quinazolinones and 2,3-dihydroquinazolin-4(1H)-ones is described. The structure of the catalyst was studied by Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray diffraction, and vibrating sample magnetometer analysis. The resulting cobalt aluminate (CoAl2O4) was an efficient catalyst and affords the desired products in good to excellent yields. Moreover, the catalyst could be easily recovered by magnetic separation and recycled for four times without significant loss of its catalytic activity. Graphic abstract: 2,3-Dihydroquinazolin-4(1H)-ones and a novel class of pyrazol-quinazolinones were synthesized through one-pot condensation reaction of isatoic anhydride, aromatic aldehydes, and amines using CoAl2O4 as nanoparticle heterogeneous catalyst in refluxing ethanol.[Figure not available: see fulltext.].

The synthesis of 2,3-dihydroquinazolin-4(1H)-ones using zinc oxide nanotubes modified by SiO2 as a catalyst with recyclable effect

Zinc oxid nano tubes have attracted much attention in recent years. Hardly, direct uses of zinc oxid nano tubes which modified by SiO2 as a catalyst with recyclability has been applied for several organic reactions. The average particle size of

Microwave-accelerated three components cyclocondensation in the synthesis of 2,3-dihydroquinazolin-4(1H)-ones promoted by Cu-CNTs

Cu-CNTs efficiently catalyzes condensation reaction of isatoic anhydride, aldehydes, and primary amines or ammonium acetate to afford the corresponding 2,3-dihydroquinazolin-4(1H)-one derivatives successfully in high yield. The protocol proves to be effic

Silica-bonded S-sulfonic acid as a recyclable catalyst for synthesis of 2,3-dihydroquinazolin-4(1H)-ones

2,3-Dihydroquinazolin-4(1H)-one derivatives were synthesized via a one-pot, three component reaction of isatoic anhydride and an aromatic aldehyde with ammonium acetate or primary amine catalyzed by silica-bonded S-sulfonic acid in ethanol at 80°C. The re