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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 387-391 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocycles by Annelation to 4-Pyridinols, II.  -  Thieno[3,2-c]pyridin-3-olsHerrn Prof. Dr. Werner Schultheis zum 75. Geburtstag gewidmet.Thieno[3,2-c]pyridin-3-ols 4 are accessible from 4-hydroxy-3-pyridine carboxylates 1 via their 4-chloro derivatives 2 on replacement of the chlorine by mercaptoacetic esters and simultaneous ring-closure. Thioacetamide transforms the 4-chloropyridines 2 into 4-pyridinethiols 3, which likewise yield thieno[3,2-c]pyridin-3-ols 4 on reaction with chloroacetonitrile. The alkali salts of 4 are transformed into enol esters 5 by reaction with acid chlorides.
    Notes: Thieno[3,2-c]pyridin-3-ole 4 werden aus 4-Hydroxy-3-pyridincarbonsäureestern 1 über deren 4-Chlorderivate 2 und Austausch des Chlors mit Mercaptoessigsäureester bei gleichzeitigem Ringschluß erhalten. Thioacetamid überführt die 4-Chlorpyridine 2 in 4-Pyridinthiole 3, die mit Chloracetonitril ebenfalls Thieno[3,2-c]pyridin-3-ole 4 liefern. Die Alkalisalze von 4 werden mit Säurechloriden in Enolester 5 übergeführt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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