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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 3411-3421 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloaddition of N-Aryl-tert-butylketenimines to Both Nitrosobenzene and 2-Methyl-2-nitrosopropaneReactions of the ketenimines 1a, b with nitrosobenzene (2a) do not give the appropriate 1,2-oxazetidines such as 3Aa, b, but produce small amounts of the benzoxazoles 4a, b and the 1,4-benzoxazines 5Aa, b. However, from 1a-c and the nitrosoalkane 2b the analogous compounds 5Ba-c and/or 3Ba-c are formed (depending on conditions); mixtures of 1d-f and 2b afford 3Bd-f only. The heterocycles 4 and 5 are believed to arise through the intermediary [4 + 2] cycloadduct 14/14′.
    Notes: Umsetzungen der Ketenimine 1a, b mit Nitrosobenzol (2a) liefern statt entsprechender 1,2-Oxazetidine vom Typ 3A geringe Mengen der Benzoxazole 4a, b sowie der 1,4-Benzoxazine 5Aa, b. Demgegenüber führen Reaktionen von 1a-c mit dem Nitrosoalkan 2b je nach Bedingung zu den analogen Verbindungen 5Ba-c und/oder 3Ba-c; aus 1d-f und 2b resultieren allein 3Bd-f. Das Auftreten von 4 und 5 wird mit der Bildung eines labilen [4 + 2]-Cycloaddukts 14/14′ erklärt, das sich unter N—O-Spaltung umlagert.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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