Nano-SiO2 catalyzed three-component preparations of pyrano[2,3-d]pyrimidines, 4H-chromenes,and dihydropyrano[3,2-c]chromenes |
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Authors: | Ebrahim Mollashahi Mohammad Nikraftar |
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Institution: | Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran |
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Abstract: | An efficient one-pot three-component procedure has been developed for the preparation of tetrahydrobenzob]pyrans, dihydropyrano3,2-c]chromenes, and pyrano2,3-d]pyrimidines using nano-SiO2 as catalyst in H2O at 70 °C. This methodology has a number of advantages such as: use of reusable catalyst, easy access, short reaction times, high yields, easy work up and use of non-toxic and green solvent. |
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Keywords: | Corresponding author Fax: 0098-54-33446565 |
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