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  • Articles  (3)
  • 1980-1984  (3)
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  • Articles  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Einführung der (Dimethylhydrazono)ethylgruppe in methylenaktive Verbindungen und Phenole (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 970-978 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Introduction of the (Dimethylhydrazono)ethyl Group into Methylene Active Compounds and PhenolsIn [2-(dimethylhydrazono)ethyl]trimethylammonium iodide the trimethylammonium group can be substituted by several nucleophiles. With this reagent (dimethylhydrazono)ethyl derivatives of CH-acidic compounds, phenols, and indole can be prepared.
    Notes: In [2-(Dimethylhydrazono)ethyl]trimethylammonium-iodid (19) läßt sich die Trimethylammoniumgruppe durch verschiedenartige Nucleophile verdrängen. CH-acide Verbindungen sowie Phenole und Indole kann man mit diesem Reagenz zu den entsprechenden Hydrazonoethyl-Derivaten umsetzen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130316
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  • 2
    Electronic Resource
    Electronic Resource
    Umsetzungen von Dimethylhydrazonen ungesättigter Aldehyde mit elektrophilen Reagenzien (1984)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 2875-2885 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Unsaturated Aldehyde Dimethylhydrazones with Electrophilic ReagentsCrotonaldehyde dimethylhydrazone (1) is substituted at C-3 by electrophiles such as chlorine, bromine, iodine, arylsulfenyl chloride, phenylsulfinyl chloride, and nitronium tetrafluoroborate to form the products 10a  -  c, 18a, b, 25, and 26. In contrast, from 1 and p-nitrobenzoyl chloride the dienehydrazide 3 is obtained. Acrolein dimethylhydrazone reacts with diazoacetic ester to give the cyclopropane derivative 29. Isoxazole 32 is obtained from 28 and p-chlorobenzonitrile oxide.
    Notes: Crotonaldehyd-dimethylhydrazon (1) wird durch elektrophile Reagenzien wie Chlor, Brom, Iod, N-Chlorsuccinimid, Arylsulfenylchlorid, Phenylsulfinylchlorid oder Nitryl-tetrafluoroborat and C-3 unter Bildung der Produkte 10a  -  c, 18a, b, 25 und 26 substituiert. Bei Einwirkung von p-Nitrobenzoylchlorid auf 1 erhält man dagegen das Dienhydrazid 3. Acrolein-dimethylhydrazon (28) reagiert mit Diazoessigester zum Cyclopropanderivat 29, mit p-Chlorbenzonitriloxid zum Isoxazolin 32.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19841170909
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  • 3
    Electronic Resource
    Electronic Resource
    Umsetzung CH-acider Verbindungen mit Dichloracetaldehyd-oxim zu (Hydroxyimino)ethyliden-Derivaten (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2796-2801 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (Hydroxyimino)ethylidene Derivatives of CH-acidic Compounds by Reaction with Dichloroacetaldehyde OximeCH-acidic compounds react with dichloroacetaldehyde oxime (15) and piperidinium acetate to give (hydroxyimino)ethylidene derivatives 20. Compounds like 2-formylcyclohexanone react thereby under elimination of the formyl group. The same products are available from enamines and 15.
    Notes: CH-acide Verbindungen lassen sich mit Dichloracetaldehyd-oxim (15) und Piperidinium-acetat zu (Hydroxyimino)ethyliden-Derivaten 20 umsetzen. Verbindungen wie 2-Formylcyclohexanon reagieren dabei unter Abspaltung der Formylgruppe. Aus Enaminen und 15 erhält man die gleichen Produkte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130824
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