FIELD: organic chemistry. SUBSTANCE: product: 5-[methyl,6-63H]-2,4-(1H, 3H)-pyrimidinedione. Thymine or 5-hydroxymethyluracil applied on the palladium catalyst (5% Pd per BaSO4) is treated with gaseous tritium at 145-200 C for 40 min. Synthesized compound is used in biochemistry. EFFECT: improved method of synthesis. 2 cl, 2 tbl
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