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  • 1970-1974  (2)
  • 1972  (2)
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  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Nucleosid-5′-carbonsäureester als Modelle für die Konformationsanalyse von Nucleosiden und Nucleotiden (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 642-649 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Esters of Nucleoside-5′-carboxylic Acids as Model Compounds for Conformational Analysis of Nucleosides and NucleotidesN.m.r. studies on the nucleoside-5′-carboxylates 5-8 lead to the detection of two rotamers with respect to the C-N-glycosidic bond. A method to distinguish between these syn- and anti-conformers is found in the influence of the conformational chirality (due to hindered rotation) on diastereotopic protons. The conclusions are augmented by o.r.d. and i.r. spectra. Procedures of esterification of the nucleoside-5′-carboxylic acids 1-4 are described.
    Notes: NMR-Studien an den Nucleosid-5′-carbonsäureestern 5-8 führen zum Auffinden von zwei Rotameren in Bezug auf die glykosidische Bindung. Als Methode zur Unterscheidung zwischen diesen syn- und anti-Konformeren wird der Einfluß der durch die Rotationshinderung bedingten konformativen Chiralität auf diastereotope Protonen herangezogen. Die Schlußfolgerungen werden durch ORD- und IR-Spektren unterstützt. Es werden Verfahren zur Veresterung der Nucleosid-5′-carbonsäuren 1-4 beschrieben.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050230
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese von Heterocyclen durch Thermolyse von o-substituierten aromatischen Diazonium-Ionen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1634-1645 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Heterocycles by Thermolysis of o-Substituted Aromatic Diazonium IonsThe thermolysis of o-substituted aromatic diazonium ions 4-8 in nitrile solution affords six and seven membered heterocyclic nitrile adducts 9, 10, 15, 16 and 18. The reactions proceed via nitrilium ions, the formation of which is discussed.
    Notes: Die Thermolyse der o-substituierten aromatischen Diazonium-Ionen 4-8 in Nitril-Lösung liefert sechs- und siebengliedrige Nitril-Addukte 9, 10, 15, 16 und 18. Die Reaktionen verlaufen über Nitrilium-Ionen, deren Bildung diskutiert wird.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050519
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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