Nano-Silica phosphoric acid: an efficient catalyst for one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones (thiones) under solvent-free or sonication conditions
الموضوعات : Iranian Journal of CatalysisAbdolhamid Bamoniri 1 , Bi Bi Fatemeh Mirjalili 2 , Sedigheh Nazemian 3
1 - Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R.Iran.
2 - Department of Chemistry, College of Science, Yazd University, I. R. Iran .
3 - Department of Chemistry, College of Science, Yazd University, I. R. Iran .
الکلمات المفتاحية: 3, Heterogeneous catalyst, Biginelli reaction, 4-Dihydropyrimidin-2(1H)-ones, 4-Dihydropyrimidin-2(1H)-thiones, Multi-component reactions, Nano silica phosphoric acid, Sonication condition,
ملخص المقالة :
Two simple protocols for the synthesis of three-component condensation reaction of an aldehyde, β-ketoester and urea or thiourea to obtain the 3, 4-dihydropyrimidin-2(1H)-ones (thiones) using nano silica phosphoric acid are reported. Short reaction times, high yields, reusability of catalyst and easy workup are some advantages of these protocols.
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