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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 3755-3763 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Conversion of the Esters of 2-Oxo-2H-1-benzopyran-3-carboxylic Acids into Esters of 2-Oxo-4-chromanacetic Acid  -  a New RearrangementEsters of 2-oxo-2H-1-benzopyran-3-carboxylic acid by heating with acetic anhydride in the presence of sodium acetate or triethylamine change to esters of 2-oxo-4-chromanacetic acid. With the anhydrides of other carboxylic acids the esters of 3-substituted 2-oxo-4-chromanacetic acids are obtained. The mechanism of this transformation, so far unknown, is discussed.
    Notes: 2-Oxo-2H-1-benzopyran-3-carbonsäureester gehen beim Erhitzen mit Acetanhydrid in Anwesenheit von Natriumacetat oder Triethylamin in die entsprechenden 2-Oxo-4-chromanessigsäureester über. Mit den Anhydriden anderer Carbonsäuren werden die Ester von 3-substituierten 2-Oxo-4-chromanessigsäuren erhalten. Der Mechanismus dieser bisher unbekannten Umwandlung wird diskutiert.
    Type of Medium: Electronic Resource
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