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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Phosphorus Compounds, 65. The Selective Elimination of Allyl Groups from Allylphosphonium, -arsonium and -sulfonium Salts and from Allyl sulfones by CyanolysisKCN cleaves allylphosphonium, -arsonium, and -sulfonium salts to give methacrylonitrile and tertiary phosphines, tertiary arsines or thioethers, respectively. Phosphonium and arsonium salts with four different ligands can be built up by alternate cyanolysis and quaternization. Allylammonium salts do not undergo the reaction, nor do allylphosphine oxides and dialkyl allylphosphonates. On the other hand, ally sulfones react with KCN to afford good yields of methacrylonitrile and sulfinic acids.
    Notes: KCN spaltet Allylphosphonium-, -arsonium- und -sulfoniumsalze in Methacrylnitril und tertiäre Phosphine, tertiäre Arsine und Thioäther auf. Durch alternierende Cyanolyse und Quartärisierung können Phosphonium- und Arsoniumsalze mit vier verschiedenen Liganden aufgebaut werden. Allylammoniumsalze, Allylphosphinoxide und -phosphonsäureester können nicht gespalten werden. Dagegen liefern Allylsulfone mit KCN in guten Ausbeuten Methacrylnitril und Sulfinsäuren.
    Additional Material: 4 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1582-1588 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Phosphorus Compounds, 64. Allyl-Propenyl Rearrangements. The Electrochemical Behaviour of some Propenyl CompoundsAllyl aryl sulfones, allyldiphenylphosphine oxide, diethyl allylphosphonate, allyltriphenylphosphonium bromide and allyltriphenylarsonium bromide undergo rearrangement on basic Al2O3 (the last-named allyl compound only to a limited extent) to give the corresponding 1-propenyl compounds. Allyldiphenylphosphine and diallylphenylphosphine also rearrange on treatment with sodium ethoxide to give the corresponding 1-propenyl compounds. The allyl and 1-propenyl compounds are characterised by i.r. and n.m.r. spectroscopy as well as polarographically.  -  Cathodic cleavage of (1-propenyl)triphenylphosphonium bromide, affords triphenylphosphine and propene in 92% yield. 1-Propenyl phenyl sulfone is cleaved electrochemically to propene and benzenesulfinic acid.
    Notes: Allyl-aryl-sulfone, Allyl-diphenyl-phosphinoxid, Allylphosphonsäure-diäthylester, Allyl-triphenyl-phosphoniumbromid und Allyl-triphenyl-arsoniumbromid lagern sich an basischem Al2O3 in die entsprechenden 1-Propenyl-Verbindungen um. Allyl-diphenyl-phosphin und Diallyl-phenyl-phosphin isomerisieren sich unter Mitwirkung von Natriumäthylat zu den entsprechenden 1-Propenyl-Verbindungen. Die Allyl- und 1-Propenyl-Verbindungen werden IR- und NMR-spektroskopisch sowie polarographisch charakterisiert.  -  Bei der kathodischen Spaltung von 1-Propenyltriphenyl-phosphoniumbromid entstehen 92% Triphenylphosphin und Propen. 1-Propenyl-phenyl-sulfon wird elektrochemisch in Propen und Benzol-sulfinsäure aufgespalten.
    Additional Material: 2 Tab.
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