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  • 1
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nikotinamid-Coenzym-Modelle, I.  -  Synthese und Molekülstruktur von vier isomeren Bis(methoxycarbonyl)[2.2](2,5)pyridinophaneAls Nikotinamid-Coenzym-Modelle wurden die [2.2](2,5)Pyridinophane 3-6 dargestellt, die jeweils zwei in Wechselwirkung stehende Nikotinester-Einheiten in den vier verschiedenen möglichen Orientierungen enthalten. 3-6 wurden durch photolytische Schwefel-Extrusion aus den entsprechenden Dithia[3.3](2,5)pyridinophanen 18-21 erhalten, deren Synthesen beschrieben werden.  -  Die Molekülstruktur wurde für alle vier Isomeren 3-6 durch Röntgen-Strukturanalyse bestimmt. Die sterischen Wechselwirkungen und einige spektroskopische Eigenschaften werden auf der Grundlage der Strukturbestimmungen diskutiert.
    Notes: As nicotinamide coenzyme models the [2.2](2,5)pyridinophanes 3-6 were prepared which consist of two interacting nicotinic ester units in the four different orientations possible. 3-6 were obtained by photolytic sulfur extrusion from the corresponding dithia-[3.3](2,5)pyridinophanes 18-21 the syntheses of which are described.  -  The molecular structures for all four isomers 3-6 were determined by X-ray analysis. The sterical interactions and some spectroscopic properties of these compounds are discussed on the basis of the structure determinations.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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