Cyanoacetic acid → n-(6-Amino-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-2-cyanoacetamide

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Reaction Steps

A mixture of 5,6-diamino-1,3-dimethyluracil hydrate (19.0 g, 0.11 mole) and cyanoacetic acid (19.0 g, 0.22 mole) is heated to 120°-130° C. under a nitrogen atmosphere. The mixture melts and resolidifies within thirty minutes. The resolidified residue is cooled to room temperature and is taken up in acetone. The residue is collected on a filter, recrystallized in water using decolorizing carbon, dried, and triturated under vacuum to yield 5-cyanoacetamido-6-amino-1,3-dimethyluracil as a solid (14.2 g; 54%).

Provenance & Evidence