Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... 1, 3-Disubstituted 5-acylamino-6-methyluracils (2a-e) were transformed into 1, 2-disubstituted 4-alkylcarbamoyl-5-methyl-1 -imidazoles (3a-e) by treatment with 5% aqueous sodium hydroxide in ethanol. Similarly, reaction of 5-acylamino-6-methyl-3-phenyl-4-(3 )-pyrimidinones ...