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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 48, 2018 - Issue 2
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Original Articles

Heteropoly acid supported on activated natural clay-catalyzed synthesis of 3,4-dihydropyrimidinones/thiones through Biginelli reaction under solvent-free conditions

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Pages 223-232 | Received 24 Aug 2017, Published online: 26 Dec 2017
 

ABSTRACT

Dihydropyrimidinones/thiones (DHPM’s) have been prepared by one-pot condensation of methyl acetoacetate, aldehydes, urea/thiourea in the presence of heteropoly-11-tungsto-1-vanadophosphoric acid, H4[PVW11O40] · 32H2O, (HPV) supported on activated natural clay (HPVAC) under solvent-free reaction condition have been proposed. The DHPM derivatives were identified through elemental analysis and melting point measurements and characterized by FT-IR, 1H-NMR, 13C-NMR spectroscopic methods.

GRAPHICAL ABSTRACT

Additional information

Funding

The authors Ponnusamy Sami and Karuppaiah Selvakumar thank University Grants Commission, New Delhi, India, for the award of major research project (F. No. 42-349/2013(SR)) and financial assistance. We also thank Managing Board, VHNSN College, Virudhunagar for infrastructural facilities.

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