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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 729 (1969), S. 124-138 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Triazolylbenzoic Acids and Acylaminoquinazolones from Benzoxazinones and Curbohydrazideso(4-s-Triazolyl)benzoic acids 2 can easily be prepared in good yields from so-called acylanthranils with carbohydrazides in boiling ethanol. In hot benzene, the isomeric 3-acyl-amino-4-quinazolones 1 are formed from the same components. Both reactions proceed via amidrazones 11, which are formed by the reaction of the terminal hydrazide nitrogen atom with the oxazinone nucleus at C-2. - 3,4,5-Trisubstituted s-triazoles can also be made from N-substituted imidoyl chlorides with hydrazides. - s-Triazolo[4,3-a]quinolines of the type 18c are available by intramolecular condensation of certain triazolylbenzoic acids.
    Notes: o-[s-Triazolyl-(4)]-benzoesäuren 2 können präparativ einfach aus [Acylanthranilen] und Carbonsäurehydraziden in siedendem absolutem äthanol gewonnen werden. Aus den gleichen Komponenten bilden sich in Benzol die isomeren 3-Acylamino-chinazolone-(4) 1. Beide Reaktionen verlaufen über Amidrazone 11, gebildet bei der Reaktion des endständigen Hydrazid-Stickstoffs mit dem Kohlenstoff-Atom 2 des Oxazinon-Ringes. - Eine weitere Synthese für den 3.4.5-trisubstituierten s-Triazol-Ring ist mit N-substituierten Imidchloriden 7 und Hydraziden ausführbar. Bestimmte Triazolylbenzosäuren lassen sich zu s-Triazolo[4.3-a]chinolinen vom Typ 18c kondensieren.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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