Library

You have 0 saved results.
Mark results and click the "Add To Watchlist" link in order to add them to this list.
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles: DFG German National Licenses  (2)
  • 1985-1989  (2)
  • Inorganic Chemistry  (2)
  • 1,3-Dithietane 1,1,3,3-tetraoxide
Source
  • Articles: DFG German National Licenses  (2)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 689-699 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cycloaddition Reactions of Heterocumulenes, XXIX.  -  Reactions of Thioketenes with IsocyanatesThe [2 + 2] cycloaddition of thioketenes 1a-f to isocyanates 2a-f yields 4-thioxo-2-azetidinones 3 as main products, which may isomerize to 4-imino-2-thietanones 5. In competing reactions, 2,4-azetidinediones 8, N-sulfonylamides 9, and 3H-1,2,4-dithiazoles 15 are formed. Thioketenes 1 react with chlorosulfonyl isocyanate (20b) to give N-unsubstituted 4-thioxo-2-azetidinones 22. Depending on the thioketene 1 and the reaction conditions, compounds 23-26 also result. The constitutions of 15b and 23a were determined by X-ray structural analyses.
    Notes: Die [2 + 2]-Cycloaddition der Thioketene 1a-f an die Isocyanate 2a-f liefert als Hauptprodukt 4-Thioxo-azetidinone 3, die sich zu 4-Imino-2-thietanonen 5 isomerisieren können. In Konkurrenzreaktionen werden 2,4-Azetidindione 8, N-Sulfonylamide 9 und 3H-1,2,4-Dithiazole 15 gebildet. Mit Chlorsulfonylisocyanat (20b) reagieren die Thioketene 1 zu N-unsubstituierten 4-Thioxo-2-azetidinonen 22. Je nach Thioketen 1 und Reaktionsführung resultieren auch die Verbindungen 23-26. Die Konstitution von 15b und 23a wurde durch Röntgenstrukturanalyse bestimmt.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1165-1175 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thioketene Syntheses, VIII.  -  Thioketenes by [3+2] Cycloreversion of 1,3-Dithiolane Derivatives2-Alkylidene-1,3-dithiolanes are transformed into S,S-dioxides 1 and S-ethyl- 2 or S-arylsulfonium salts 3. After deprotonation at C-5 they form in a [3 + 2] cycloreversion thioketenes 5, which can be trapped as thioamides 17, 18. The stabilized thioketenes 5e, i-k afford 1:1 cycloadducts 24a, b, 27a-d with azomethines; in addition, thioketene 5j provides a dimer 28j, which was characterized by an X-ray structural investigation.
    Notes: 2-Alkyliden-1,3-dithiolane werden in S,S-Dioxide 1 und S-Ethyl-2 oder S-Arylsulfonium-Salze 3 übergeführt. Nach Deprotonierung an C-5 bilden sich in einer [3 + 2]-Cycloreversion Thioketene 5, die als Thioamide 17, 18 abgefangen werden können. Die stabilisierten Thioketene 5e,i-k liefern mit Azomethinen 1: 1-Cycloaddukte 24a,b, 27a-d; das Thioketen 5j reagiert daneben zu einem Dimeren 28j, das durch Röntgenstrukturanalyse charakterisiert wurde.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...