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Title Zirconia Sulfuric Acid: An Efficient Heterogeneous Catalyst for the One-Pot Synthesis of 3,4-Dihydropyrimidinones Under Solvent-Free Conditions
Type JournalPaper
Keywords Zirconia sulfuric acid  Solid acid catalyst  Biginelli  3,4-Dihydropyrimidinones  Recyclability
Abstract In this article, zirconia sulfuric acid (ZrSA) has been synthesized from the reaction of ZrO2 with chlorosulfonic acid. It was characterized by (FT-IR, XRD, TGA, SEM, EDS, BET, BJH, ICP and pH analysis). This catalyst was employed for the synthesis of 3,4-dihydropyrimidinones via cyclocondensation of b-ketoester, aromatic aldehydes and urea/thiourea under solvent-free conditions. Main advantages of the catalyst were non toxic nature, high stability and reusability.
Researchers ma z (Fifth Researcher), Maryam Ziyaei (Fourth Researcher), Nadia Koukabi (Third Researcher), Eskandar Kolvari (Second Researcher), Maliheh Hosseini (First Researcher)