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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 725 (1969), S. 73-86 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ketene Derivatives, XVI1). Electrophilic Substitution of Simple Ketene S,N-AcetalsSimple ketene S,N-acetals [R-CH=C(SCH3)NR′ 2; R=Horalkyl] react with electrophiles such as acid chlorides, activated vinyl chlorides, ketene mercaptals, ethoxymethylene sulfonic acid amides, dinitrofluorobenzene, trichloro-s-triazine and o-nitrobenzenesulfenyl chloride to give β-substituted ketene S,N-acetals. In some cases products of secondary reactions are isolated; acid chlorides, for instance, sometimes give substituted β-acyloxyacrylic acid thioamides.
    Notes: Einfache Keten-S.N-acetale [R-CH=C(SCH3)NR′2; R=H oder Alkyl] reagieren mit Elektrophilen - z. B. mit Säurechloriden (zu 4), aktivierten Vinylchloriden (zu 12), Ketenmercaptalen (zu 14), Äthoxymethylensulfonamiden (zu 22, 23), Dinitrofluorbenzol (zu 19), Cyanurchlorid (zu 18) und o-Nitro-benzolsulfensäurechlorid (zu 20, 21) - zu β-substituierten Keten-S.N-acetalen. In einigen Fällen isoliert man Produkte von Folgereaktionen; mit Säurechloriden erhält man z. T. substituierte β-Acyloxy-acrylsäurethioamide (z. B. 8).
    Additional Material: 13 Tab.
    Type of Medium: Electronic Resource
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