synthesis of 2,4,5-triaryl-1h-imidazoles using a potent, green and reusable nano catalyst (fhs/sio2)
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abstract
a simple, green and efficient method for synthesis of 2,4,5-trisubstituted imidazoles is described via three-component cyclocondensation of benzil or benzoin, aldehyde and ammonium acetate by using the nano sio2-supported ferric hydrogen sulfate (fhs/sio2), as a catalyst, under solvent-free conditions. the nano sio2 support and catalyst were characterized by x-ray diffraction (xrd), transmission electron microscopy (tem) and ir spectroscopy. in this project, the optimum conditions such as: reaction temperature, reaction time and amount of catalyst were investigated. the major advantages of the present method are high yields, shorter reaction times, easy work-up, purification of products by non-chromatographic method and the reusability of the catalyst.
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Journal title:
iranian journal of catalysisPublisher: islamic azad university, shahreza branch
ISSN 2252-0236
volume 5
issue 3 2015
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