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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 295-300 
    ISSN: 0009-2940
    Keywords: 5(4H)-Isoxazolones, 4-arylidene- ; Münchnones ; Pyrrole-3-carboxylic acids ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloadditions Reaktionen von 3-Methyloxazolium-5-olaten an 4-Aryliden-5(4H)-isoxazoloneDie instabilen Cycloaddukte, die aus den Benzylidenisoxazolen 2 und Oxazolium-5-olaten 1 gebildet werden, erleiden CO2-Eliminierung zu den stereoisomer substituierten 3,7-Diazaspiro-[4,4]nonan-Derivaten 3, die in einem Fall (3a, b) isoliert wurden. Durch weitere Reaktionen werden die Verbindungen 3 in die Pyrrol-3-carbonsäuren 4 übergeführt. Reaktionswege und regiochemisches Verhalten werden diskutiert.
    Notes: The unstable cycloadducts formed from benzylideneisoxazolones 2 and oxazolium-5-olates 1 undergo CO2 elimination to afford the stereoisomeric substituted 3,7-diazaspiro[4,4]nonane derivatives 3, which were isolated in one case (3a, b). On further reaction, compounds 3 are transformed into pyrrole-3-carboxylic acids 4. Reaction paths and regiochemical behaviour are discussed.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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