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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 3427-3436 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Reaction of (Nitrobenzyl)pyridinium Salts with PhenylhydroxylamineOn reaction with pheylhydroxylamine, (4-nitrobenzyl)pyridinium salts are first attacked at the nitro group. Elimination of pyridine yields nitrones of azoxy- and azobenzene derivatives. The structures assigned to the new compounds are confirmed by alternate synthesis.
    Notes: 4-Nitro-benzylpyridiniumsalze werden von Phenylhydroxylamin zuerst an der Nitrogruppe angegriffen. Unter Pyridin-Abspaltung entstehen Nitrone von Derivaten des Azoxy- und des Azobenzols, deren Konstitution durch unabhängige Synthesen gesichert wird.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 3437-3441 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Rearrangements of Azoxy CompoundsOn treatment with alkoxides, benzylidene dichlorides with arylazoxy groups in ortho-position yield the corresponding azocarbonic acids or esters. In the case of 4-nitro-2-(benzeneazoxy)-benzylidendichloride an indazolone derivative is formed additionally, which can also be obtained by heating the corresponding aldonitrone. The underlying common reaction seems to be a rearrangement with migration of oxygen from the azoxy group to the neighbouring aldehyde group.
    Notes: Behandelt man Benzylidendichloride, die in ortho-Stellung einen Arylazoxy-Rest enthalten, mit Alkalialkoholaten, so entstehen die entsprechenden Azobenzolcarbonsäuren bzw. deren Ester. Im Falle des 4-Nitro-2-benzolazoxy-benzylidendichlorids wird daneben ein Indazolon-Derivat gebildet, das auch thermisch zugehörigen Aldonitron zugänglich ist. Diese Befunde deuten auf eine zugrunde liegende gemeinsame Umlagerung unter Übertragung des Sauerstoffs der Azoxy- auf die Aldehyd-Gruppe hin.
    Type of Medium: Electronic Resource
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