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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 121 (1990), S. 85-87 
    ISSN: 1434-4475
    Keywords: 3-Acetyl-3,4-dihydrocoumarin ; Photochemical dehydrogenation ; Coumarin derivatives ; photochemical properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bei UV-Bestrahlung von alkoholischen Lösungen von 3-Acetyl-3,4-dihydrocumarin (1) unter O2 werden 3-Acetylcumarin (2) und 3,3′-Diacetyl-3,3′,4,4′-biscumarin (3) gebildet. Die Anwesenheit von molekularem O2 ist für die Photodehydrierung erforderlich, wobei die Umsetzung an Silikagel quantitativ verläuft.
    Notes: Summary The ultraviolet irradiation of air-saturated alcoholic solutions of 3-acetyl-3,4-dihydrocoumarin (1) leads to the formation of 3-acetylcoumarin (2) and 3,3′-diacetyl-3,3′,4,4′-tetrahydro-4,4′-biscoumarin (3). The presence of molecular oxygen is an indispensable condition for the occurrence of a photodehydrogenation process, which is quantitatively when effected on silica gel.
    Type of Medium: Electronic Resource
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