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  • Inorganic Chemistry  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 400-407 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Stevens Rearrangement of Benzylsuccinimidosulfonium Salts - Starting Point for a Simple Synthesis of N-(1-Chloroalkyl)succinimidesIn the Stevens rearrangement of benzylmethylsuccinimidosulfonium chloride (3b) two isomers 5b and 6b are isolated. By following the rearrangement by 1H NMR spectroscopy at -40°C the imidate 7b can be shown to exist, which changes into 5b at -20°C. Products 5d-h without any isomers are obtained from suitable benzylsulfonium salts 3d-h. The chlorolysis of 5d-h is a simple procedure for the synthesis of N-(1-chloroalkyl)succinimides 16.
    Notes: Bei der Stevens-Umlagerung an Benzylmethylsuccinimidosulfoniumchlorid (3b) lassen sich zwei Isomere 5b und 6b isolieren. Durch 1H-NMR-spektroskopische Verfolgung der Umlagerung bei -40°C kann zusätzlich das Imidat 7b nachgewiesen werden, das bereits ab -20°C in 5b übergeht. Aus geeigneten Benzylsulfoniumsalzen 3d-h lassen sich isomerenfreie Umlagerungsprodukte 5d-h herstellen. Die Chlorolyse von 5d-h ist ein einfaches Verfahren zur Synthese von N-(1-Chloralkyl)succinimiden 16.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 2231-2242 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation and Rearrangement of Succinimidosulfonium Salts from Sulfides with Lower Nucleophilic CharacterThe presence of antimony pentachloride is necessary for the formation of succinimidosulfonium salts 4 from N-chlorosuccinimide (2) and the sulfides 1b-g. The arylmethyl salts 4b-d and the methyl(methoxycarbonylemethyl) salt 4e react with tertiary amines to give the imidates 7b-e. With the allylsulfonium salts 4f, g only the products 6f, g of an [1.2]-shift may be isolated. The additional formation of an imidate 7f from 4f is shown by low temperature 1H NMR spectroscopy.
    Notes: Zur Darstellung der Succinimidosulfonium-Salze 4 aus N-Chlorsuccinimid (2) und den Sulfiden 1b-g ist die Zugabe von Antimonpentachlorid notwendig. Die Arylmethyl-Salze 4b-d und das Methyl(methoxycarbonylmethyl)-Salz 4e führen mit tert. Aminen zu den Imidaten 7b-e. Bei den Allylsulfonium-Salzen 4f, g sind nur die Produkte 6f, g aus einer [1.2]-Umlagerung isolierbar. Durch Tieftemperatur-1H-NMR-Spektroskopie läßt sich die zusätzliche Entstehung eines Imidats 7f aus 4f nachweisen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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