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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 335-337 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bei niedriger Temperatur reagieren Sulfonylisocyanate 1 und Keten-O,N-acetale 2 zu 1,4-Dipolen 3. Beim Erwärmen lagern sich die Dipole 3 in einer formalen O→N-Methyl-Wanderung zu Malonamiden 4 um. Ausgehend von 2a und 2b mit deuterierter O-Methyl-Gruppe gab ein Kreuzungsversuch halbdeuterierte Produkte und bewies so, daß die Methyl-Verschiebung intermolekular verläuft.
    Notes: At low temperature, sulfonyl isocyanates 1 react with ketene O,N-acetals 2 to give 1,4-dipoles 3. On warming, dipoles 3 rearrange in a formal O→N methyl sift to give malonamides 4. A crossover experiment starting from 2a and 2b with a deuterated O-methyl group gave scrambling of the label and thus confirmed the intermolecular nature of the methyl transfer.
    Type of Medium: Electronic Resource
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