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  • 1
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On teh Stereochemistry of Allenes, II1). - Teh Molecular Structure of Allenes and Ketenes I. - Synthesis of Allenecarboxylic Acids by the Phosphonate Method and their Optical ResolutionThe synthesis of allenecarboxylic acids 1 from their corresponding ethyl esters 2 and their optical resolution are reported. The use of phosphonates instead of phosphoranes is shown to be useful especially for the preparation of thermally unstable esters 2. The method of resolution described seems to be quite general for allenecarboxylic acids.
    Notes: Die Darstellung von Allencarbonsäuren 1 über ihre Äthylester 2 und ihre Enantiomerenspaltung werden beschrieben. Dabei erweist es sich besonders für die Synthese thermisch instabiler Ester 2 als vorteilhaft, Phosphonate [α-(Diäthoxyphosphoryl)alkansäureester] anstelle von Phosphoranen zu verwenden. Das beschriebene Verfahren der Enantiomerentrennung scheint Allgemeingültigkeit für Allencarbonsäuren zu besitzen.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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