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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 105-119 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: α-Trifluoracetamino carbon ions are important fragments in the mass spectra of N-Trifluoracetyl α-amino acids and their derivatives. They fragment by eliminating neutral molecules. This breakdown is mainly influenced by the structure of their substituents. Several of these ions show some remarkable skeletal rearrangements.
    Notes: α-Trifluoracetaminocarbonium-Ionen treten als charakteristische Bruchstücke in den massenspektren von N-Trifluoracetyl-α-aminosäuren und deren Derivaten auf. Sie zerfallen unter Eliminierung stabiler Neutralmolekeln, wobei in erster LInie die Struktur ihres Substituenten entscheidenden Einfluß ausübt. Im Zuge dieser Fragmentierungen kommt es bei einer Reihe von Ionen zu bemerkenswerten Strukturumlagerungen.
    Additional Material: 5 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1969), S. 121-134 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: As a result of high resolution mass measurements, calculation of metastable ions, and investigation of specifically deuterated compounds the fragmentation is discussed of some α-substituted N-methyl benzylamides containing different N-acyl groups. α-Cleavage leads to the formation of N-methyl α-acylamino carbon ions which show skeletal rearrangement. The intensity of the rearranged ions depends on the structure of the N-acyl group. Migration of the α-methyl group is observed in the mass spectra of N-acetyl and N-p-Cl-benzoyl N-methyl-α-phenylethylamide.
    Notes: Der massenspektrometrische Zerfall einiger α-substituierter N-Methylbenzylamide mit verschiedenen N-Acylgruppen wird anhand der Ergebnisse aus hochauflösender Massenbestimmung, Berechnung der metastabilen Ionen Untersuchung spezifisch deuterierter Verbindungen diskutitert. Dabei wird die Strukturumlagerung der durch α-Spaltung entstandenen N-Methyl-α-acylaminocarboniu-Ionen nachgewiesen. Sie ist von der Art der N-Acylgruppe abhängig. In den Massenspektren von N-Acetyl-bzw. N-p-Cl-Benzoyl-methyl-α-phenyläthylamid wird die Wanderung der α-Methylgruppen beobachtet.
    Additional Material: 8 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 17 (1988), S. 415-416 
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 209-213 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Als Antamanid bezeichnen wir einen Inhaltsstoff des grünen Knollenblätterpilzes, Amanita phalloides, der an der weißen Maus die tödliche Wirkung der Amanitatoxine Phalloidin und α-Amanitin bei spätestens gleichzeitiger Verabreichung aufhebt. Die Konzentration im Pilz ist allerdings so gering, daß dessen Giftwirkung überwiegt. Antamanid ist ein cyclisches Dekapeptid aus den L-Aminosäuren Alanin, Phenylalanin, Prolin und Valin, die zueinander im Molverhältnis von 1:4:4:1 stehen. Die Sequenz wurde durch Gaschromatographie-Massenspektrometrie aufgeklärt. Die Synthese auf einem klassischen Weg der Peptidchemie bewies die Richtigkeit der Strukturformel.
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 26 (1893), S. 1114-1121 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0570-0833
    Keywords: Antamanide ; Natural products ; Peptides ; Amanita phalloides ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Antamanide is the name we have given to a constituent of the fungus Amanita phalloides. This substance counteracts the lethal action of the Amanita toxins phalloidine and α-amanatine if administered to the white mouse before, or simultaneously with, the poisons. Its concentration in the fungus is, however, so low that the toxic action of the latter predominates. Antamanide is a cyclic decapeptide formed from the L-amino acids alanine, phenylalanine, proline, and valine in the molar ratio 1:4:4:1. The amino-acid sequence was determined by a combination of gas chromatography and mass spectrometry. The structural formula assigned was confirmed by synthesis according to a classic route of peptide chemistry.
    Additional Material: 2 Ill.
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