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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 729 (1969), S. 119-123 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Azobarbituric Acid arid Alloxan AzineAzobarbituric acid (2) is formed as a by-product of the reaction between barbituric acid and carbamoylazide (H2NCON3), the main product being 5-aminocarbonylbarbituric acid. It is easily dehydrogenated by bromine water to give alloxan azine (3) which readily undergoes disproportionation yielding 2, diazobarbituric acid (1), and alloxan (5). 2 can be prepared in good yield by coupling diazobarbituric acid with barbituric acid in alkaline medium.
    Notes: Azobarbitursäure (2) tritt als Nebenprodukt der Reaktion zwischen Barbitursäure und Carbamoylazid (H2NCON3) zu 5-Aminocarbonyl-barbitursäure auf. 2 wird durch Bromwasser zu Aloxanazin (3) oxydiert, das leicht disproportioniert, wobei 2, Diazobarbitursäure (1) und Alloxan (5) entstehen. 2 wird in guter Ausbeute durch Kupplung von Diazobarbitursäure mit Barbitursäure in alkalischem Medium dargestellt.
    Type of Medium: Electronic Resource
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