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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1989 (1989), S. 863-881 
    ISSN: 0170-2041
    Keywords: Alteromonas luteo-violaceus ; Bromopyrrole ; Marine bacteria ; Pentabromopseudiline ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Marine Bacteria, I. - Synthesis of Pentabromopseudiline, a Cytotoxic Phenylpyrrole from Alteromonas luteo-violaceusA new synthesis of 2,3,4-tribromo-5-(3,5-dibromo-2-hydroxyphenyl)pyrrole (1a, pentabromopseudiline), an antibiotic, enzymeinhibitory and cytotoxic active constituent of the marine bacterium Alteromonas luteo-violaceus, is described. For investigation of structure-activity relationships further 2-phenylpyrroles are investigated. Key step in their synthesis is the Grignard reaction of 2-(1,3-dioxan-2-yl)ethylmagnesium bromide (9d) with benzoyl chlorides yielding γ-phenyl-γ-ketoaldehydes 24, and the Paal-Knorr cyclisation of the latter.
    Notes: Eine neue Synthese für 2,3,4-Tribrom-5-(3,5-dibrom-2-hydroxyphenyl)pyrrol (1a, Pentabrompseudilin), einem antibakteriell, enzyminhibitorisch und cytotoxisch wirksamen Inhaltsstoff aus dem marinen Bakterium Alteromonas luteo-violaceus, wird beschrieben. Für die Untersuchung von Struktur-Wirkungs-Beziehungen werden zahlreiche weitere 2-Phenylpyrrole in einer Reaktionsfolge hergestellt, deren Schlüsselschritte die Grignard-Reaktion von 2-(1,3-Dioxan-2-yl)ethylmagnesiumbromid (9d) mit Benzoylchloriden zu γ-Phenyl-γ-ketoaldehyden 24 und deren Paal-Knorr-Cyclisierung sind.
    Additional Material: 11 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1990 (1990), S. 423-432 
    ISSN: 0170-2041
    Keywords: Alteromonas luteo-violaceus ; Marine bacteria ; Bromopyrrole ; Pentabromopseudiline ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Marine Bacteria, II.  -  Synthesis of Cyclic and Steric Hindered PseudilinesFor structure-activity studies, various derivatives of pentabromopseudiline (1) were synthesized with distorted (3a) or hetero-cis-arranged rings (30c). The pyrrole 30c was accessible by Paal-Knorr cyclization of the 4-keto aldehyde 25d, which was obtained in a 5-step synthesis starting from 18.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0170-2041
    Keywords: Haloperoxidase ; Enzymes ; Bromination ; Pentabromopseudilin ; Pseudilins ; Bromopyrroles ; Pyrroles, bromo ; Streptomyces aureofaciens ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Marine Bacteria, VII. - Enzymatic Bromination of Pseudilins and Related Heteroarylphenols with a Chloroperoxidase from Streptomyces aureofaciens Tü 24During the bromination of various substituted synthetic phenyl pyrroles with a chloroperoxidase from Streptomyces aureofaciens Tü 24, mixtures of bromopyrroles are obtained which are not easily accessible by chemical methods. According to the structure of the pyrroles and the kinetics of their transformation, the reaction centre of the enzyme is situated in a slitlike cavity of about 4 × 7 × 8 Ä.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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