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Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate as an efficient and reusable catalyst for one-pot synthesis of 3,4-dihydropyrimidones under solvent-free conditions

✍ Scribed by Xin-Bin Yang; Xiang-Kai Fu; Yu Huang; Ren-Quan Zeng

Book ID: 111491526
Publisher: Versita
Year: 2011
Tongue: English
Weight: 194 KB
Volume: 65
Category: Article
ISSN: 0366-6352
DOI: 10.2478/s11696-011-0091-5

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✦ Synopsis

Abstract

Zirconium(IV) 4-sulphophenylethyliminobismethylphosphonate (ZSBEDP) was prepared and characterised by elemental analysis, IR, TG-DSC, and XRD. ZSBEDP was found to be an efficient catalyst for the Biginelli reaction of aromatic aldehyde, ethyl acetoacetate, and urea or thiourea under solvent-free conditions so as to give 3,4-dihydropyrimidones in good to excellent yields. The catalyst can be separated by simple filtration and reused without significant loss of its catalytic activity.

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