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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 194-199 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: E,Z-Rearrangements of 2,3-Dichloroacrylic Acid Derivatives and Synthesis of E,Z-2-Bromo-4,5-dichloro-2,4-pentadienoic AcidThe configuration of the stereoisomeric acrylic acids 1a and 2a is confirmed by 13C-NMR spectroscopic investigations. Rearrangements E-Z, probably due to the cis-effect of the chlorine atoms in Z-isomers, were observed in the preparation of the acid chloride 1d from 2a and the aldehyde 1f from 2d and 2g.-The synthesis of the pentadienoic acid 5 from 1f via 3 and 4 is described.
    Notes: Die Konfiguration der stereoisomeren Dichloracrylsäuren 1a und Za wird durch 13C-NMR-spektroskopische Untersuchungen festgelegt. Umlagerungen E-*Z die wahrscheinlich durch den cis-Effekt der Chloratome in den Z-Isomeren verursacht sind, wurden bei der Darstellung des Säurechlorids 1d aus 2a sowie der des Aldehyds If aus 2d und 2g beobachtet.-Die Synthese der Pentadiensäure 5 aus 1f über 3 und 4 wird beschrieben.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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