ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3767-3773 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions with Allylidenephosphoranes, III. Novel Resonance-stabilized Phosphorus YlidesVia the simultaneous reaction of the α- and the γ-position, the allylidenephosphoranes 4 are converted by dicarboxylic acid dichlorides into five- and six-membered isocyclic phosphoranylidenediones 1, 2; by phenyl isothiocyanate into the dithioxo- or iminothioxophosphoranylidene-pyridines 8 and 9, 10, respectively. These systems are stabilized by charge delocalization. With monocarboxylic acid chlorides, acylation occurs at the α-position only, to yield the 2-phosphor-anylidene-3-buten-1-ones 5. Subsequent reductive removal of the phosphorane group of 5 leads to the β,γ-unsaturated ketones 6.
    Notes: Die Allylidenphosphorane 4 bilden durch α,γ-Reaktion mit Dicarbonsäuredichloriden fünf-und sechsgliedrige isocyclische Phosphoranylidendione 1, 2; mit Phenylisothiocyanat die Dithioxo- bzw. Iminothioxophosphoranylidenpyridine 8 bzw. 9, 10. Diese Systeme sind durch Ladungsdelokalisierung stabilisiert. Mit Monocarbonsäurechloriden erfolgt die Acylierung nur in der α-Stellung unter Bildung der 2-Phosphoranyliden-3-buten-1-one 5. Durch reduktiven Abbau der Phosphorangruppe werden diese in die β,γ-ungesättigten Ketone 6 übergeführt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...