View all references, [9b]19. Mojtahedi , MM , Sharifi , A. , Mohsenzadeh , F. and Saidi , MR 2000. Synth. Commun., 30: 69 [Taylor & Francis Online], [Web of Science ®] View all references we now report an operationally simple and fast method for the preparation of substituted uracils and thiouracils by one-pot condensation reaction of methyl or ethyl β-ketoesters and urea (or thiourea) in solvent-free conditions under microwave irradiation and in short time, ...