A facile synthesis of 4-acyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidines (6-acyl uracils) and 4-acyl-6-aryl-2-oxo-2,3-dihydropyrimidines is described where the Friedel–Crafts reaction on 2,6-dichloropyrimidine-4-carbonyl chloride plays a crucial role.
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