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CoNiFe 2 O 4 @ Silica‐SO 3 H nanoparticles: New recyclable magnetic nanocatalyst for the one‐pot synthesis of 3,4‐dihydropyrimidin‐2( 1 H )‐ones/thiones under solvent‐free conditions
Author(s) -
Karimian Azam,
Rad Masoud Saadati,
Mahdavi Elham
Publication year - 2020
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.202000229
Subject(s) - chemistry , catalysis , thiourea , fourier transform infrared spectroscopy , nuclear chemistry , spectroscopy , nanoparticle , magnetic nanoparticles , scanning electron microscope , elemental analysis , infrared spectroscopy , yield (engineering) , urea , proton nmr , solvent , analytical chemistry (journal) , chemical engineering , organic chemistry , nanotechnology , materials science , metallurgy , physics , quantum mechanics , engineering , composite material
A useful and green synthesis of 3,4‐dihydropyrimidin‐2(1 H )‐ones/thiones derivatives were achieved by one‐pot cyclocondensation between substituted aryl aldehydes, diketone/ketoester, and urea/thiourea using magnetic CoNiFe 2 O 4 @Silica‐SO 3 H 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 CoNiFe 2 O 4 @Silica‐SO 3 H 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, 1 H NMR, 13 C NMR, mass spectrometry, and the elemental analysis.