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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 219-226 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Lithium Alkynolates and Lithio KetenesLithium phenylalkynolate (7a) was obtained from 3,4-diphenylisoxazole (5a) via 3,4-diphenyl-5-isoxazolyllithium (5b). Compound 7a was trapped with chlorotrimethylsilane as phenyltrimethylsilylketene (8 a) and with aldehydes and ketones as p-lactones 11.-3-Phenylisoxazole (5c) afforded the dilithio ketene (8d) (lithium tetramethylpiperidide as metalating agent). 8d was trapped as bis(trimethylsilyl)ketene or bis(trimethylstannyl)ketene (8b or c).-Other heterocyclic precursors for lithium alkynolates were examined.
    Notes: Aus 3,4-Diphenylisoxazol (5a) erhielt man über 3,4-Diphenyl-5-isoxazolyllithium (5b) Lithiumphenylethinolat (1a). Dieses wurde mit Chlortrimethylsilan zu Phenyl(trimethylsilyl)keten (8a), mit Aldehyden und Ketonen zu ß-lactonen 11 umgesetzt.-Aus 3-Phenylisoxazol (5c) entstand (mit Lithium-tetramethylpiperidid als Metallierungsmittel) Dillithioketen (8d), das als Bis(tri-methylsilyl)- oder Bis(trimethylstannyl)keten (8b bzw. c) nachgewiesen wurde.-Andere hetero-cyclische Vorstufen für Lithiumalkinolate wurden erprobt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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