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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 703-706 
    ISSN: 1434-193X
    Keywords: 4-Methylpyrimidine ; Ylides ; Quantum chemical calculations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -For the first time in the pyrimidinium ylides series we present a theoretical and experimental study concerning the structure, stability and reactivity of pyrimidinium ylides and interesting correlations between these properties. 4-Methylpyrimidinium ylides are relatively stable compounds, their stability varying with the nature of the ylide carbanion substituent. The more electron-withdrawing these substituents, the more the anionic charge is delocalized and therefore the higher the stability. The data from experiments and quantum chemical calculations are in agreement with each other. The quantum chemical calculations show the possibility of using pyrimidinium ylides as nucleophilic reagents as well as 1,3-dipoles in reaction with appropriate reagents. Eight new pyrimidine compounds (4 salts and 4 ylides) were obtained.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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