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  • 1980-1984  (1)
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    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 1429-1432 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Treatment of the methanol adduct 1a of 5-diazouracil with aqueous potassium cyanide provides 6-cyanouracil (3a) with concomitant evolution of nitrogen. The reaction of aqueous hydrogen cyanide with 1 a forms 6-cyano-5-diazo-1,6-dihydrouracil (2a) which decomposes in alkaline solution to yield also 6-cyanouracil (3a) and nitrogen. In a similar way 6-cyano-1,3-dimethyluracil (3b) is obtained from the 5-diazo-1,3-dimethyluracil derivative 1b via the 6-cyanoadduct 2b. Monosubstituted diazenes are suggested as labile intermediates in this reaction.
    Notes: Einwirkung von wäßriger Kaliumcyanidlösung auf das 5-Diazouracil-Methanoladdukt 1a führt unter Stickstoffabspaltung zum 6-Cyanuracil (3a). Mit wäßrigem Cyanwasserstoff ergibt 1a zu-nächst 6-Cyan-5-diazo-1,6-dihydrouracil (2a), das in wäßrig-alkalischem Medium ebenfalls in 3a übergeht. In gleicher Weise erhält man aus dem 5-Diazo-1,3-dimethyluracilderivat 1b über das 6-Cyanaddukt 2b 6-Cyan-1,3-dimethyluracil (3b). Als instabile Zwischenprodukte dieser Reaktion werden monosubstituierte Diazene vorgeschlagen.
    Type of Medium: Electronic Resource
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