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  • 1980-1984  (4)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 1746-1754 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Configuration of 1,3,3-Trialkyl-2-methyleneindolines with Substituents on the Methylene GroupThe 1,3,3-trialkyl-2-methyleneindolines 3a-f, 4, and 5 have been synthesized and 1H and 13C NMR spectroscopically investigated. The resulting correlations between 1H and 13C chemical shifts of the 1,3,3-alkyl groups and the (E)- or (Z)-configuration of the enamine double bond allow the determination of the unknown configuration of the halogenophosphanes and -arsanes 1.
    Notes: Die 1,3,3-Trialkyl-2-methylenindoline 3a-f, 4 und 5 werden synthetisiert und 1H- und 13C-NMR-spektroskopisch untersucht. Die dabei gewonnenen Zuordnungskriterien zwischen 1H- und 13C-chemischen Verschiebungen der 1,3,3-Alkylgruppen und der (E)-bzw. (Z)-Konfiguration an der Enamin-Doppelbindung erlauben die Festlegung der bisher unbekannten Konfiguration der Halogenphosphane bzw. Halogenarsane 1.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 391-394 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An Improved Method for the Synthesis of 1,3,3-Triethyl-2-methyleneindoline1,3,3-Triethyl-2-methyleneindoline (8) has been synthesized in 40% yield by alkylation of 2-methylindole with iodoethane in ethanol at 100 - 110°C/50 bar using an improved separation procedure. The 1H- and 13C-NMR spectra of 8 and its tetrafluoroborate salt are examined.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 3289-3305 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of β-Arsa-trimethinecyanine Dyes with Indoline End Groups1)The reaction of 1,3,3-trialkyl-2-methylenindolines 4 and 5 with arsenic (III) halides yields the halogeno-arsanes 6a-d by a twofold nucleophilic substitution. 6a-d react with trimethyl-oxonium tetrafluoroborate to give the β-arsa-trimethinecyanine dyes 3a, b. These are the first higher methinylogous representatives to the arsa-monomethinecyanine dyes 1 containing arsenic in the oxidation state + 3 and with coordination number 2. - The 1H, 13C NMR, and UV/Visspectra of these β-arsa-cyanines 3a, b as well as the results of an X-ray analysis of 3b are discussed and compared with those of the analogous β-“carba”-, β-aza-, and β-phospha-trimethinecyanines.
    Notes: Durch Umsetzung der 1,3,3-Trialkyl-2-methylenindoline 4 und 5 mit Arsen (III)-halogeniden wurden durch zweifache nucleophile Substitution die Halogenarsane 6a-d erhalten, die bei der Umsetzung mit Trimethyloxonium-tetrafluoroborat die β-Arsa-trimethincyanin-Farbstoffe 3a, b ergeben. Dies sind die ersten höher-methinylogen Vertreter der Arsa-monomethincyanine 1 mit Arsen in der Oxidationsstufe + 3 und der Koordinationszahl 2. - Die 1H-, 13C-NMR- und UV/Vis-Spektren der β-Arsa-cyanine 3a, b sowie die Ergebnisse der Röntgenstrukturanalyse von 3b wurden diskutiert und mit denen der analogen β-“Carba”-, Aza- und β-Phospha-trimethincyanine verglichen.
    Additional Material: 4 Ill.
    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: Synthesis and Properties of β-Phospha-trimethinecyanine Dyes with Indoline End GroupsHerrn Prof. Dr. Karl Dimroth zum 70. Geburtstag gewidmet.Reaction of 1,3,3-trialkyl-2-methyleneindolines 4 and 5 with phosphorus(III) halides yields, by a twofold nucleophilic substitution, the halogeno-phosphanes 6a - c, which in turn react with tri-methyloxonium tetrafluoroborate to give the β-phospha-trimethinecyanine dyes 3a, b. These β-phospha-cyanines 3a, b are the first higher-methinylogous representatives of the phospha-monomethinecyanine dyes 1, synthesized in 1964 by Dimroth and Hoffmann as the first compounds containing phosphorus in the oxidation state + 3 and with coordination number 2.  -  The 1H-, 13C-, 31P-NMR- as well as the UV/VIS spectra of these β-phospha-cyanines 3a, b and of the analogous β-“carba”-, β-aza- and β-arsa-trimethinecyanines are discussed with respect to their constitution, configuration, and π-electron-density distribution.
    Notes: Durch Umsetzung der 1,3,3-Trialkyl-2-methylenindoline 4 und 5 mit Phosphor(III)-halogeniden werden durch zweifache nucleophile Substitution die Halogenphosphane 6a - c erhalten, die beim Umsatz mit Trimethyloxonium-tetrafluoroborat die β-Phospha-trimethincyanin-Farbstoffe 3a, b ergeben. Diese β-Phospha-cyanine 3a, b sind die ersten höher-methinylogen Vertreter der 1964 von Dimroth und Hoffmann dargestellten Phospha-monomethincyanine  -  den ersten Verbindungen mit Phosphor in der Oxidationsstufe + 3 und mit der Koordinatonszahl 2.  -  Die 1H-, 13C-, 31P-NMR- und die UV/VIS-Spektren der β-Phospha-cyanine 3a, b und der analogen β-,„Carba“-, β-Aza- und β-Arsa-trimethincyanine werden in bezug auf Konstitution, Konfiguration und π-Elektronendichte-Verteilung diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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