H14[NaP5W30O110] catalyzed one-pot three-component synthesis of dihydropyrano[2,3-c]pyrazole and pyrano[2,3-d]pyrimidine derivatives |
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| Authors: | M M Heravi A Ghods F Derikvand K Bakhtiari F F Bamoharram |
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| Institution: | 1. Department of Chemistry, School of Sciences, Azzahra University, Vanak, Tehran, Iran
2. Department of Chemistry, Islamic Azad University-Mashhad Branch, Mashhad, Iran
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| Abstract: | This is a report of an efficient, clean and facile method for the synthesis of 1,4-dihydropyrano2,3-c] pyrazole and pyrano2,3- d]pyrimidine derivatives via three-component one-pot condensation of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one or barbituric acid, aldehydes and malononitrile in the presence of a catalytic amount of preyssler type heteropolyacid as a green and reusable catalyst in water or ethanol under refluxing conditions. |
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