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  • 1965-1969  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 96 (1965), S. 1209-1213 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract N-unsymmetrically substituted borazines were prepared by reacting a mixture of ammonium chloride and methylammonium chloride with BCl3. The 2,4,6-chloroborazine derivatives have been alkylated and separated. 2,4,6-Trimethylborazine and 2,4,6,4′6′-pentamethylbiborazinyl-1,2′ were obtained by Grignardmethylation of 2,4,6-chloroborazine, and IR assignements were made.
    Notes: Zusammenfassung Die Darstellung von N-unsymmetrisch substituierten Borazinderivaten durch Umsetzung eines Gemisches von Ammoniumchlorid und Methylammoniumchlorid mit BCl3 wird beschrieben. Die entstehenden 2,4,6-Trichlorborazinderivate werden in 2,4,6-Alkylborazine übergeführt und diese getrennt. Eine der Nebenreaktionen wird durch die Umsetzung von 2,4,6-Trichlorborazin mit CH3MgBr, wobei 2,4,6-Trimethylborazin und 2,4,6,4′6′-Pentamethylbiborazinyl-1,2′ erhalten wurden, untersucht. IR-Zuordnungen für die beiden letztgenannten Verbindungen werden gegeben.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 24 (1968), S. 11-12 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new antifungal polyene antibiotic flavomycoine is described. By structural investigations it was shown that this antibiotic belongs to a new type of polyene antibiotics in which the pentaene chromophore is conjugated to the lactone carbonyl group.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 213 (1965), S. 401-404 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird eine Vorschrift angegeben zur Darstellung der α-Methoxy-2-naphthylessigsäure aus 2-Methylnaphthalin. Die dargestellte Säure ist auf ihre analytische Verwendbarkeit zur Alkalimetallbestimmung geprÜft worden. Die Versuche zeigen, daß eine spezifische quantitative Natriumbestimmung in Anwesenheit aller anderen Alkalimetallionen ohne Schwierigkeiten möglich ist. Die Fehlergrenze liegt bei ±1%.
    Notes: Summary α-Methoxy-2-naphthyl-acetic acid has been examined for its applicability to the determination of alkali metals and its preparation from 2-methylnaphthalene has been described. It has been shown that the determination of sodium can be performed in presence of all other alkali metals without any difficulties by means of this reagent. The limit of error is ±1%.
    Type of Medium: Electronic Resource
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