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Sodium selenate efficiently catalyzes the three-component Biginelli reaction of an aldehyde, a,β-keto ester and urea or thiourea under solvent-free conditions to afford the corresponding 3,4-dihydropyrimidin-2(1 H )-ones or –thiones in excellent yields. KEY WORDS : Dihydropyrimidinones, Sodium selenate, Biginelli reaction, Three component reaction Bull. Chem. Soc. Ethiop. 2009 , 23(1), 141-144.

bulletin of the chemical society of ethiopia

&lt;b&gt;EFFICIENT SODIUM SELENATE-CATALYZED SYNTHESIS OF 3,4-DIHYDRO-2(1&lt;i&gt;H&lt;/i&gt;)-PYRIMIDINONES AND –THIONES UNDER SOLVENT-FREE CONDITIONS&lt;/b&gt;