Oxalic acid dihydrate catalyzed synthesis of 3,4-dihydropyrimidin-2-(1H)-one derivatives under thermal and solvent-free conditions
الموضوعات : Iranian Journal of CatalysisFarzaneh Mohamad Pour 1 , Malek Taher Maghsoodlou 2 , Reza Heydari 3 , Mojtaba Lashkari 4
1 - Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, P. O. Box 98135-674 Zahedan, Iran.
2 - Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, P. O. Box 98135-674 Zahedan, Iran.
3 - Department of Chemistry, Faculty of Science, University of Sistan and Baluchestan, P. O. Box 98135-674 Zahedan, Iran.
4 - Faculty of Science, Velayat University, Iranshahr, Iran.
الکلمات المفتاحية: 3, Biginelli reaction, Oxalic acid.2H2O, Green methodology, 4-Dihydropyrimidinone,
ملخص المقالة :
Oxalic acid dihydrate as a green, mild and efficient catalyst for the one-pot three-component Biginelli synthesis of 3,4-dihydropyrimidin-2-(1H)-one derivatives from the reaction between β-keto esters (methyl or ethyl acetoacetate), aromatic aldehyde (benzaldehye derivatives) and urea or thiourea under thermal and solvent-free conditions with excellent yields and short reaction time is studied. The most remarkable benefits of this synthetic method include the green methodology, an eco-friendly, inexpensive and non-toxic catalyst, solvent-free conditions, the availability of materials, and a simple operational procedure with no column chromatographic separation. The products were characterized by melting points, IR and 1H NMR spectroscopy.
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