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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1989 (1989), S. 1081-1083 
    ISSN: 0170-2041
    Keywords: Alkylation, enantioselective ; β-Ketophosphonate, chiral ; Oxazolidinones ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Einfache Darstellung von Dimethyl-[(3S)-3-methyl-2-oxo-5-octinyl]phosphonatDie diastereoselektive Alkylierung des chiralen Evans-Intermediates 2 mit 1-Iod-2-pentin (3) gibt das Oxazolidinon 4. Titanalkoxid-katalysierte Spaltung des Produktes zum Ethylester 5 und Acylierung von Methanphosphonsäure-dimethylester ergibt das chirale Phosphonat 6. Die optische Reinheit des Phosphonates 6 wird durch Trennung der Enantiomeren an einer chiralen HPLC-Säule und durch Umsetzung zum Bromketon 8 - einem Zwischenprodukt für das Prostacylin-Analoge ZK 96480 - belegt.
    Notes: The diastereoselective alkylation of the chiral Evans intermediate 2 with 1-iodo-2-pentyne (3) gives the oxazolidinone 4. Titanium alkoxide-catalysed cleavage yields the ethyl ester 5, which is used to acylate dimethyl methanephosphonate to the chiral phosphonate 6. The optical purity of phosphonate 6 is checked by separation on a chiral HPLC column and by conversion into the bromo ketone 8, an intermediate for the prostacyclin analogue ZK 96480.
    Type of Medium: Electronic Resource
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