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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 55-65 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloaddition Reactions of Heterocumulenes, XXVI. Cycloadducts from Aryl Isothiocyanates and 2,2-Disubstituted EnaminesAryl isothiocyanates 1 react with enamines 2 to give two types of 2:1 cycloadducts. Below 50°C, 1a - g and 2 give rise to 6-imino-1,3-thiazine-2-thiones 5, the constitutions of which are proved by an X-ray analysis of 5c. Above 50°C or starting from 4-nitrophenyl isothiocyanate (1h),2,4-dithiouracils 6 are formed. 1:1 cycloadducts of the reactants are detected spectroscopically; on workup, they hydrolyze to give 2-formylthiopropionanilides 9.
    Notes: Arylisothiocyanate 1 und Enamine 2 reagieren zu zwei Typen von 2:1-Cycloaddukten. Unterhalb von 50°C entstehen aus 1a - g und 2 6-Imino-1,3-thiazin-2-thione 5, deren Konstitution durch die Röntgenstrukturanalyse von 5c bewiesen wurde. Oberhalb 50°C oder aus 4-Nitrophenylisothio-cyanat (1h) bilden sich 2,4-Dithiouracile 6. 1:1-Cycloaddukte der Reaktanten lassen sich spektroskopisch nachweisen; bei der Aufarbeitung hydrolysieren sie zu 2-Formylthiopropionaniliden 9.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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