Nano-ZrO2 sulfuric acid: a heterogeneous solid acid nano catalyst for Biginelli reaction under solvent free conditionsElectronic supplementary information (ESI) available. See DOI: 10.1039/c5ra19350h

Nano-ZrO 2 sulfuric acid [n-ZrO 2 -SO 3 H (n-ZrSA)] has been synthesized from the reaction of nano-ZrO 2 with chlorosulfonic acid as sulfonating agent. This catalyst was characterized via FT-IR, XRD, TGA, FESEM, TEM, EDX, BET, BJH, ICP and pH analysis. We show that n-ZrSA catalyzed the Biginelli rea...

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Main Authors: Kolvari, Eskandar, Koukabi, Nadiya, Hosseini, Maliheh M, Vahidian, Mitra, Ghobadi, Elham
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Summary:Nano-ZrO 2 sulfuric acid [n-ZrO 2 -SO 3 H (n-ZrSA)] has been synthesized from the reaction of nano-ZrO 2 with chlorosulfonic acid as sulfonating agent. This catalyst was characterized via FT-IR, XRD, TGA, FESEM, TEM, EDX, BET, BJH, ICP and pH analysis. We show that n-ZrSA catalyzed the Biginelli reaction for the synthesis of 3,4-dihydropyrimidin-2(1 H )one derivatives in high yields under solvent-free conditions by the reaction of aldehyde, β-diketoester and urea (or thiourea). The main advantages of the catalyst are its non-toxic nature, high stability and reusability. Nano-ZrO 2 sulfuric acid [n-ZrO 2 -SO 3 H (n-ZrSA)] has been synthesized from the reaction of nano-ZrO 2 with chlorosulfonic acid as sulfonating agent.
ISSN:2046-2069
DOI:10.1039/c5ra19350h