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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 4806-4820 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Electroreduction of Organic Compounds, 6. Electroreduction of N,N-Disubstituted Thioamides in the Presence of ElectrophilesElectron-uptake by the N,N-disubstituted thioamides 1-4 in aprotic medium and the behaviour of their radical anions depend substantially on the nature of the thioacyl group and the nitrogen substituents as shown by polarographic and cyclovoltammetric measurements. - Good yields of the α-amino thioethers 8-13 are obtained by preparative electroreduction in the presence of alkylating agents. The corresponding α-amino-silyl thioethers 23 are further reduced to α-(trimethylsilyl)benzylamines 24. In the presence of oxygen and ethyl halide S-ethyl thiobenzoate (27) is formed from 2a or c.
    Notes: Polarographische und cyclovoltammetrische Messungen an den N,N-disubstituierten Thioamiden 1-4 im aprotonischen Medium zeigen, daß die Aufnahme von Elektronen und das Verhalten der gebildeten Radikalanionen wesentlich von den Substituenten im Thioacylrest und am Stickstoff abhängen. - Bei präparativen Elektrolysen in Gegenwart von Alkylierungsmitteln entstehen in guten Ausbeuten die α-Amino-thioether 8-13. Die entsprechenden α-Amino-silylthioether 23 werden dagegen zu α-(Trimethylsilyl)benzylaminen 24 weiterreduziert. Ist Sauerstoff und Ethylhalogenid zugegen, so erhält man aus den Thioamiden 2a und c Thiobenzoesäure-S-ethylester (27).
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Electroreduction of Organic Compounds, 1.  -  Condensation Reactions of Acetonitrile with the Aid of Electrogenerated BasesElectrochemical reduction of alkyl benzoates in dry acetonitrile yields benzoylacetonitrile (2). Methyl 3-cyano-2-hydroxy-2-phenylpropionate (7) is obtained from methyl phenylglyoxalate (5) under the same conditions.  -  Analogously β-dialkylaminocinnamonitriles 9 can be obtained from N,N-dialkylthiobenzamides 8. N,N-Dimethylbenzamide (10) yields β-dimethylamino-cinnammonitrile (9a) on electoreduction in the presence of azobenzene as a probase by catalytical generation of acetonitrile anions.
    Notes: Die elektrochemische Reduktion von Benzoesäureestern in wasserfreiem Acetonitril liefert Benzoylacetonitril (2). Aus Phenylglyoxylsäure-methylester (5) entsteht unter gleichen Bedingungen 3-Cyan-2-hydroxy-2-phenylpropionsäure-methylester (7).  -  Analog können aus N,N-Dialkylthiobenzamiden 8 β-Dialkylaminozimtsäurenitrile 9 erhalten werden. Aus N,N-Dimethylbenzamid (10) entsteht β-Dimethylaminozimtsäurenitril (9a) bei der Elektroreduktion in Gegenwart von Azobenzol als Probase durch die katalytische Erzeugung von Acetonitrilanionen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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