Conversion of acids to benzimidazoles with transition metal/zeolites |
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Authors: | M Zendehdel A Mobinikhaledi F Hasanvand Jamshidi |
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Institution: | (1) Department of Chemistry, Faculty of Science, Arak University, Arak, Iran |
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Abstract: | Transition metal/Y zeolites were prepared using microwave solid state and aqueous solution ion exchange methods. The activity
of these zeolites was investigated in a conversion of acids to benzimidazoles reaction between 4-methyl-1, 2-phenylenediamine and 3-nitrobenzoic acid. The yield of these reactions increased in order of CuY < Fe2+Y < NiY < CoY < NaY < CrY < MnY < ZnY for both methods. The solid state ion-exchanged zeolites showed higher activity in comparison
to the aqueous solution exchange. Yields of products in the presence of the ZnY zeolite were of the order of 69–83%. It seems
that the Lewis sites are better sites compared to the Bronsted sites for this reaction. |
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Keywords: | Benzimidazole Ion-exchange Acid sites Zeolite |
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