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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 54 (1982), S. 596-598 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-193X
    Keywords: Strained molecules ; 1-Vinyltricyclo[4.1.0.02,7]heptanes ; Electrophilic additions ; Rearrangements ; Cyclic ketene imine ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of 1-vinyltricyclo[4.1.0.02,7]heptanes 4 has been obtained by Ni0-catalyzed cross-coupling reactions of the corresponding Grignard reagent with vinyl halides or via reaction of 4b with various electrophiles. Selected model compounds 4 were treated with tetracyanoethylene (TCNE), N-phenyl-1,2,4-triazoline-3,5-dione (PTAD), and dimethyl acetylenedicarboxylate (DMAD). Product studies revealed that TCNE and PTAD attacked the CC double bond forming a zwitterion, which in most cases underwent several carbenium ion rearrangements until internal bond formation of the ionic centers took place. The main reaction path of DMAD and 4 led via attack at the bicyclo[1.1.0]butane bridgehead to a biradical of type 38, which after H abstraction and CC bond formation gave rise to the tricyclic system 37.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Steroidal Compounds of Phosphorus, VII1). -Dimethylphosphinates and Dimethylthiophosphinates of HydroxysteroidsHydroxysteroids 1a-7a are converted in high yields into the dimethylphosphinates 1b-7b by dimethylphosphinic chloride or N,N-(dimethyl)dimethylphosphinic amide. Dimethylthiophosphinic chloride reacts uniformly and completely in presence of triethylamine to give the corresponding dimethylthiophosphinates 1c-7c, 8, and 9.
    Notes: Hydroxysteroide1a-7a werden durch Dimethylphosphinsäurechlorid oder N,N-(Dimethyl)-dimethylphosphinsäureamid mit hohen Ausbeuten in die Dimethylphosphinsäureester 1b-7b übergeführt. Dimethylthiophosphinsäurechlorid reagiert in Gegenwart von Triethylamin einheitlich und vollständig zu den entsprechenden Dimethylthiophosphinsäureestern 1c-7c, 8 und 9.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 2-Metalated Diaziridinyl and 1,2,3,5-Tetrazinyl Radicals from 3-Chlorodiazirines with Bis(trimethylsilyl)- and Bis(trimethylgermyl)mercuryThe thermal or photochemical reaction of 3-substituted 3-chlorodiazirines 1 with (Me3M)2Hg (M = Si, Ge) leads to the formation of N1-metalated diaziridinyl radicals (ESR) 3 and 5. Analogously, 3-chloro-3-phenyldiazirine (1b) reacts under irradiation (λ ≧ 400 nm) giving N2-metalated 1,2,3,5-tetrazinyl radicals (ESR), most likely via the above mentioned diaziridinyl radicals. The tetrazinyl radicals are in equilibrium with the corresponding dimers and are thermo-labile. They decompose on attempted isolation.Hydroxysteroids 1a-7a are converted in high yields into the dimethylphosphinates 1b-7b by dimethylphosphinic chloride or N,N-(dimethyl)dimethylphosphinic amide. Dimethylthiophosphinic chloride reacts uniformly and completely in presence of triethylamine to give the corresponding dimethylthiophosphinates 1c-7c, 8, and 9.
    Notes: Aus den 3-substituierten 3-Chlordiazirinen 1 und (Me3M)2Hg (M = Si, Ge) entstehen teils thermisch, teils photochemisch die N-metallierten Diaziridinylradikale (ESR) 3 und 5. Analog reagiert 3-Chlor-3-phenyldiazirin (1b) unter Bestrahlung (λ ≧ 400 nm), wahrscheinlich über die genannten Radikale, zu N2-metallierten 1,2,3,5-Tetrazinylradikalen (ESR). Diese stehen im Gleichgewicht mit ihren Dimeren und sind thermolabil. Versuche der Isolierung führten zur Zersetzung.Hydroxysteroide1a-7a werden durch Dimethylphosphinsäurechlorid oder N,N-(Dimethyl)-dimethylphosphinsäureamid mit hohen Ausbeuten in die Dimethylphosphinsäureester 1b-7b übergeführt. Dimethylthiophosphinsäurechlorid reagiert in Gegenwart von Triethylamin einheitlich und vollständig zu den entsprechenden Dimethylthiophosphinsäureestern 1c-7c, 8 und 9.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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