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Issue 0, 1973
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Heterocyclic imines and amines. Part XVI. 2,6-Diaminopyrazine and its 1-oxide from iminodiacetonitrile

Abstract

With palladium–charcoal, 2,6-bishydroxyiminopiperazine (made from iminodiacetonitrile and hydroxylamine at 70°) underwent hydrogen transfer to yield 2,6-diaminopyrazine, characterised as the diacetyl derivative. From iminodiacetonitrile and hydroxylamine in the cold, the bis(amide oxime) resulted but in the hot with added hydroxylamine hydrochloride—conditions which effected a cycloaddition even to nitrilotriacetonitrile—a hydrated complex of 2,6-bishydroxyiminopiperazine and hydroxylamine hydrochloride was formed, together with 2-amino-6-hydroxyaminopyrazine 1-oxide. Reduction of the latter afforded 2,6-diaminopyrazine 1-oxide, which was acetylated to 2,6-diacetamidopyrazine 1-oxide; the latter was deoxygenated to 2,6-diacetamidopyrazine. Attempts to prepare the mono(amide oxime) of iminodiacetonitrile led to a self-condensation product of aminoacetamide oxime, namely 2,5-bishydroxyiminopiperazine. In comparative experiments, o-cyanobenzyl cyanide gave with hydroxylamine 1-amino-3-hydroxyaminoisoquinoline, and with a mixture of hydroxylamine and its hydrochloride in the hot, 1,2,3,4-tetrahydro-1,3-bishydroxyiminoisoquinoline. Aspects of the mass spectra of the various compounds are reported.

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Article type: Paper
DOI: 10.1039/P19730000606
J. Chem. Soc., Perkin Trans. 1, 1973, 606-612

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    Heterocyclic imines and amines. Part XVI. 2,6-Diaminopyrazine and its 1-oxide from iminodiacetonitrile

    N. R. Barot and J. A. Elvidge, J. Chem. Soc., Perkin Trans. 1, 1973, 606
    DOI: 10.1039/P19730000606

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