AlCl 3 mediated three component cyclocondensation for the synthesis of 5-unsubstituted 3,4-dihydropyrimidin-2(1 H )-ones

5-Unsubstituted-3,4-dihydropyrimidin-2-(1H)-ones have been synthesized in exeellent yields in aluminium trichloride mediated three component evelocondensation of aldehyde, urea and enolisable ketones.