Abstract:The efficiency of various heteropoly compounds as well-known solid acids is investigated for the three-component condensation reaction of an aldehyde, b-ketoester and urea to afford the dihydropyrimidinones (DHPM). Compared to the classical Biginelli reaction conditions, this new method consistently has the advantage of excellent yields and short reaction time. The objective of this study is the use of Keggin heteropolyacid (HPAs) noted H3PMo12O40 and its ammonium salts H3-2xCuxPMo12O40 and (NH4)3-2xCuxPMo12O4… Show more
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