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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 200-209 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Epoxide with Isocyanates, II1b)-Preparation and Characterization of 2-OxazolidinonesIsocyanates react with epoxides to yield 2-oxazolidinones. The reaction of isocyanates with un-symmetrically substituted epoxides 1 was studied in order to investigate differences in the direction of ring opening of the epoxides as a function of the type of catalyst (nucleophilic or electrophilic). With the exception of styrene oxides, where 4- and 5-substituted 2-oxazolidinones 4 and8 are formed, all other epoxides examined lead to 5-substituted 2-oxazolidinones, independent of the catalyst, e.g. 2a-c.
    Notes: Isocyanate reagieren mit Epoxiden zu 2-Oxazolidinonen. Um auf die Öffnungsrichtung des Epoxidringes in Abhängigkeit vom Katalysator (nucleophil oder elektrophil) schließen zu können, wurden Umsetzungen von Isocyanaten mit unsymmetrisch substituierten Epoxiden 1untersucht; dabei konnte festgestellt werden, daß nur aus Styroloxid auch in 4-Stellung substituierte2-Oxazolidinone 4 und 8 gebildet werden. Alle anderen untersuchten Epoxide führen unabhängig vom Katalysator ausschließlich zu 5-substituierten 2-Oxazolidinonen, z. B. 2a-c.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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