Transformations of 5-azauracil in reactions with some nucleophiles

Heating 5-azauracil 1 with 3-methyl-1-phenylpyrazol-5-one 2 in boiling butanol gave dipyrazolylmethane 3 and biuret 4; under similar conditions, indoles 5 react with 1 to yield stable 6-indolyl derivatives of 2,4-dioxohexahydro-s-triazine 6.1Fax: +7 3432 22 0781.