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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1976 (1976), S. 30-35 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the 1,3-Dipolarophilic Reaction Behaviour of EthylenetetracarbonitrileReaction of ethylenetetracarbonitrile as well as that of ethyl cyanoformate with 2-[3,3-bis-(trifluoromethyl)-1 -pyrazolin-1-ylio]-l,l,l,3,3,3-hexafluoro-2-propanides 1 yields 〈4,4.8,8-tetrakis(trifluoromethyl)- 1,3,5-triazabicyclo[3.3.0]oct-2-en-2-yl〉ethylenetricarbonitriles and ethyl 4,4,8,8-tetrakis(trifluoromethyl)-1,3,5-triazabicyclo[3.3.0]oct-2-ene-2-carboxylates 2a-f, respectively. The orientation of the nitrile function with respect to the 1,3-dipolar species in compounds 2 is shown by 19F-NMR spectroscopy.
    Notes: Die Umsetzung von Äthylentetracarbonitril wie auch von Cyanameisensäure-äthylester mit 2-[3,3-Bis(trifluormethyl)-l-pyrazolin-l -ylio]-1, 1,1,3,3,3-hexafluor-2-propaniden 1 liefert 〈4,4,8,8-Tetrakis(trifluormethyl)-l,3,5-triazabicyclo[3.3.0]oct-2-en-2-yl〉äthylentricarbonitrile bzw. 4,4,8,8-Tetrakis(trifluormethyl)-l,3,5-triazabicyclo[3.3.0]oct-2-en-2-carbonsäure-äthylester 2a bis f. Die Orientierung der Nitrilfunktion bezüglich der 1,3-dipolaren Spezies in den Verbindungen 2 wird durch 19F-NMR-Spektroskopie bewiesen.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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