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  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1985 (1985), S. 2363-2370 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substituted 1,2,4,6-Thiatriazine 1,1-Dioxides, their Synthesis and StructureN2-(Methoxycarbonyl)amidines 4 and analogously substituted O-(alkyl)isoureas 5 yield, on reaction with N-alkylsulfamic chlorides, sulfamides 6 and 7 which can be cyclized to give 1,2,4,6-thiatriazin-3-one 1,1-dioxides 8 or 9, respectively. Their structural assignment  -  with regard to the position of the acidic hydrogen  -  is supported by X-ray analysis of 9a. The compounds 8 and 9 show herbicidal activity.
    Notes: N2-(Methoxycarbonyl)amidine 4 und analog substituierte O-(Alkyl)isoharnstoffe 5 führen bei der Umsetzung mit N-Alkylsulfamidsäurechloriden zu Sulfamiden 6 und 7, die sich zu 1,2,4,6-Thiatriazin-3-on-1,1-dioxiden 8 bzw. 9 cyclisieren lassen. Ihre Strukturzuordnung hinsichtlich der Position des aciden Wasserstoffs wird durch Röntgenstrukturanalyse von 9a abgesichert. 8 und 9 wirken herbizid.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1988 (1988), S. 317-319 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substituted 3-Chloro-2H-1,2,4,6-thiatriazine 1,1-Dioxides, Their Synthesis and Reactions, II1)2H-1,2,4,6-Thiatriazin-3(4H)-one 1,1 -dioxides 4 and 5 react with phosphorus pentachloride to yield novel 3-chloro-2H-1,2,4,6-thia-triazine 1,1-dioxides 6 and 7, which are interesting building blocks for subsequent nucleophilic reactions. The reactivity of the halogen atom is illustrated by the reaction of 7 a with propargyl alcohol to 8, by the rearrangement of intermediate thiophosphoric esters to 9 and by an Arbusov-type reaction of 7 a with trimethyl phosphite to 10. The compounds 6, 7, and 8 are herbicidally active.
    Notes: 2H-1,2,4,6-Thiatriazin-3(4H)-on-1,1-dioxide 4 und 5 führen bei der Umsetzung mit Phosphorpentachlorid zu neuartigen 3-Chlor-2H-1,2,4,6-thiatriazin-1,1-dioxiden 6 und 7, interessanten Synthesebausteinen für nucleophile Folgereaktionen. Die Reaktivität des Halogenatoms wird beispielsweise durch Umsetzung von 7 a mit Propargylalkohol zu 8, die Umlagerung intermediär anfallender Thiophosphorsäureester zu 9 sowie eine Arbusov-analoge Reaktion von 7a mit Trimethylphosphit zu 10 belegt. 6, 7 und 8 wirken herbizid.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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