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  • Articles  (2)
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  • Articles  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 625-639 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nucleoside Transformations, V. Transformation of Guanosine into 2′-Deoxy, 3′-Deoxy-, 2′,3′-Anhydro- and xylo-Guanosine3′-und 2′-deoxyguanosine (12 and 13, respectively) are obtained from guanosine (1) upon reaction with trimethyl orthoacetate, pivaloyl chloride/pyridine, tributyltin hydride and sodium methylate through the intermediates 2, 3a/4a. 2-N,5′-O-Dipivaloyl-2′,3′-anhydroguanosine (14) is formed on treatment of the 3′-iodoguanosine derivative 10 with potassium phthalimide. The 2′.3′-anhydroderivatives 14-16 form N-3 → C-3′-cyclonucleosides in aqueous solution. Stirring of 14 with a boron trifluoride etherate solution yields xylo-guanosine derivative 22.
    Notes: 3′-und 2′-Desoxyguanosin (12 bzw. 13) werden, ausgehend von Guanosin (1), durch Umsetzung mit Orthoessigsäure-trimethylester, Pivaloylchlorid/Pyridin, Tributylzinnhydrid und Natriummethylat über die Zwischenstufen 2, 3a/4a dargestellt. 2-N,5′-O-Dipivaloyl-2′,3′-anhydroguanosin (14) entsteht bei Behandlung des 3′-Iodguanosin-Derivats 10 mit Phthalimidkalium. In wäßriger Lösung zeigen die 2′,3′-Anhydroguanosin-Derivate 14-16 N-3 → C-3′-Cyclonucleosid-Bildung. Das xylo-Guanosin-Derivat 22 entsteht aus 14 beim Rühren mit einer Bortrifluoridetherat-Lösung.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1585-1596 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nucleoside Transformations, III. - Transformation of Inosine into 2′- and 3′-Deoxy- and 2′,3′-AnhydroinosineReaction of inosine (1) with trimethyl orthoacetate, pivaloyl chloride/pyridine and tributyltin hydride leads via the intermediates-2, 3/4, and 11/13 to 2′- and 3′-deoxyinosine (14 and 12, respectively). Treatment of the 3′-iodohypoxanthin derivative 8 with sodium methoxide yields 2′,3′-anhydroinosine (16) which forms an N-3 → C-3′ cyclonucleoside in aqueous solution.
    Notes: 2′- und 3′-Desoxyinosin (14 bzw. 12) werden ausgehend von Inosin (1) durch Umsetzung mit Orthoessigsäure-trimethylester, Pivaloylchlorid/Pyridin und Tributylzinnhydrid über die Zwischenstufen 2, 3/4 und 11/13 dargestellt. 2′,3′-Anhydroinosin (16) entsteht bei der Behandlung des 3′-Iodhypoxanthin-Derivats 8 mit Natriummethylat. In wäßriger Lösung zeigt 16 (N-3 → C-3′)-Cyclonucleosidbildung.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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