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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 2114-2123 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sulfur Heterocycles, I. Synthesis and Reaction Behaviour of 2H-1,3-ThiazetesThe reaction of thiocarboxamides with hexafluoroacetone in the presence of trifluoroacetic anhydride/pyridine yields 6H-1,3,5-oxathiazines 1. Thermolysis of 1 affords 2H-1,3-thiazetes 3 which are in a thermally mobile equilibrium with N-(perfluoroisopropylidene)thiocarboxamides 2. This opens simple synthetic pathways to 3H-1,2,4-dithiazoles 6, 5-imino-2-thiazolines 7, 5,6-dihydro-4H-1,3-thiazines 8-10, 4H-1,3-thiazines 11 as well as 4H-1,3,5-thiadiazines 12.
    Notes: Durch Umsetzung von Thiocarbonsäureamiden mit Hexafluoraceton in Gegenwart von Trifluor-essigsäureanhydrid/Pyridin werden 6H-1,3,5-Oxathiazine 1 gewonnen. Die Thermolyse von 1 liefert 2H-1,3-Thiazete 3, die in einem thermisch mobilen Gleichgewicht mit N-(Perfluorisopropyliden)thiocarbonsäureamiden 2 stehen. Dies eröffnet einfache Synthesewege für 3H-1,2,4-Dithiazole 6, 5-Imino-2-thiazoline 7, 5,6-Dihydro-4H-1,3-thiazine 8-10, 4H-1,3-Thiazine 11 sowie 4H-1,3,5-Thiadiazine 12.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
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