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

作者: Karuppaiah Selvakumar , Thangamariyappan Shanmugaprabha , Murugan Kumaresan , Ponnusamy Sami

DOI: 10.1080/00397911.2017.1396614

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摘要: ABSTRACT Dihydropyrimidinones/thiones (DHPM's) have been prepared by one-pot condensation of methyl acetoacetate, aldehydes, urea/thiourea in the presence of …

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