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Current Nanoscience


ISSN (Print): 1573-4137
ISSN (Online): 1875-6786

Preparation of 1,4-dihydropyridine Derivatives Using Perchloric Acid Adsorbed on Magnetic Fe3O4 Nanoparticles Coated with Silica

Author(s): Mohammad Reza Mohammad Shafiee, Majid Ghashang and Abbas Fazlinia

Volume 9 , Issue 2 , 2013

Page: [197 - 201] Pages: 5

DOI: 10.2174/1573413711309020006

Price: $65


Perchloric acid adsorbed on magnetic Fe3O4 nano-particles coated with silica (Fe3O4@SiO2-HClO4) as a magnetically separable nano-catalyst was prepared and used for the preparation of 1,4-dihydropyridine derivatives via multi-component reaction of cinnamaldehyde, aromatic amines and methyl / ethyl acetoacetate in high yields. Quantitative conversion of the reactants was achieved under solvent-free conditions; recycle of the catalyst, through convenient magnetic decantation, shows non-significant loss in activity. The prepared nano-composite has been subjected for thorough characterization with X-ray diffraction (XRD) and Field Emission Scanning Electron Microscope (FE-SEM) techniques. The average particle size of nano-particles was obtained as 70 nm.

Keywords: Fe3O4 nano-particles, Fe3O4@SiO2-HClO4, 1, 4-dihydropyridine, Hantzsch reaction, magnetically separable nano-catalyst, cinnamaldehyde.

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