期刊
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
卷 67, 期 9, 页码 1702-1714出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.202000229
关键词
Biginelli reaction; CoNiFe2O4@Silica-SO3H; green chemistry
资金
- University of Gonabad Research Council
A useful and green synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives were achieved by one-pot cyclocondensation between substituted aryl aldehydes, diketone/ketoester, and urea/thiourea using magnetic CoNiFe2O4@Silica-SO3H nanoparticles under solvent-free condition. The choice of this approach showed essential advantages such as short reaction time, simple work-up procedure, high activity of the catalyst, high yield of the reaction products, the magnetic properties of the catalyst, and environmentally amiable conditions. In addition, the catalyst recovered and reused four times without notable loss of its activity. The magnetic CoNiFe2O4@Silica-SO3H nanoparticles were described by Fourier-transform infrared spectroscopy (FT-IR), field emission scanning electron microscope, energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and vibrating sample magnetometer. The products were obtained with excellent yields (88-98%). The formation of the products was confirmed and identified with their physical properties (melting points), the FT-IR,H-1 NMR,C-13 NMR, mass spectrometry, and the elemental analysis.
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