Synthesis of 2,4,5-triaryl-1H-imidazoles using a potent, green and reusable nano catalyst (FHS/SiO2)

Iranian Journal of Catalysis

مقاله 6، دوره 5، شماره 3، آذر 2015، صفحه 237-243   

نوع مقاله: Articles

نویسندگان

Mehdi Bakavoli¹؛ Hossein Eshghi¹؛ Ali Mohammadi^{* 1}؛ Hassanali Moradi¹؛ Javad Ebrahimi²

¹Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, P.O. Box 91775-1436, Mashhad, Iran.

²Young Researchers Club, Islamic Azad University, Mashhad Branch

چکیده

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.

کلیدواژه‌ها

2,4,5-Trisubstituted imidazoles؛ Heterogeneous catalyst؛ Solvent-free synthesis؛ Nano Catalyst؛ Ferric hydrogen sulfate

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