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  • 1
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of 2-Aryl-(4-R)-arsenines by Cyclohexadienol → Arsabenzene RearrangementKOH/[18]crown-6 phase-transfer catalyzed addition of arylarsines (phenylarsine, p-tolylarsine) to the (3-R)-3-methoxy-1,4-pentadiynes 13 yields the cis/trans isomeric 1-aryl-1,4-dihydro-(4-R)-4-methoxyarsenines, the 1H-NMR- and 13C-NMR spectra of which are discussed. - The addition of BF3-etherate or p-toluenesulfonic acid to the 1,4-dihydroarsenines 14, 15 causes rearrangement under 1,2-aryl migration to the 2-aryl-(4-R)-arsenines 22, 24. This rearrangement represents the first element-organic analogue of the cyclohexadienol → benzene rearrangement. The 1H-NMR, 13C-NMR, UV, and mass spectra of the synthesized arsenines 22, 24 are discussed.
    Notes: Durch KOH/[18]Krone-6 phasentransfer-katalysierte Addition von Arylarsanen (Phenylarsan, p-Tolylarsan) an (3-R)-3-Methoxy-1,4-pentadiine 13 werden cis/trans-isomere 1-Aryl-1,4-dihydro-(4-R)-4-methoxyarsenine 14 und 15 erhalten, deren 1H-NMR- und 13C-NMR-Spektren diskutiert werden. - Die 1,4-Dihydroarsenine 14 und 15 lagern sich bei Umsetzung mit BF3-Etherat oder p-Toluolsulfonsäure unter 1,2-Arylverschiebung in die 2-Aryl-(4-R)-arsenine 22 bzw. 24 um. Diese Umlagerung stellt das erste elementorganische Analogon zur Cyclohexadienol → Benzol-Umlagerung dar. Die 1H-NMR-, 13C-NMR-, UV- und Massenspektren der dargestellten Arsenine 22 und 24 werden diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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