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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 724 (1969), S. 128-136 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation und Hydrolysis of 4- Halogenomethylen-1.3-dioxolanes4-Halogenomethylen-1,3-dioxolanes (4a-o) are obtained by base-catalyzed addition of formaldehyde to 1-halogen-1-propyn-3-ols (3). Acid hydrolysis of the dioxolane derivatives 4 yields 1-halopropan-3-ol-2-ones (5a-f, i-o), which split off hydrogen halide to give 2,3-diketones 6 and 7a-c, if the hydroxyl group is attached to a primary or secondary carbon atom.
    Notes: Durch basenkatalysierte Addition von Formaldehyd an 1-Halogen-propin-(1)-ole-(3) (3) werden 4-Halogenmethylen-1.3-dioxolane (4a-o) erhalten. Die saure Hydrolyse von 4 führt zu 1-Halogen-propanol-(3)-onen-(2) (5a-f, i-o). Soweit diese eine primäre oder sekundäre Hydroxy-Gruppe enthalten (5a-f), werden sie beim Erwärmen in die 2.3-Diketone 6 bzw. 7a-c und Halogenwasserstoff gespalten.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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