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  • 1990-1994  (1)
  • 1965-1969  (1)
  • 1925-1929
  • 1915-1919
  • Organic Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Structure elucidation of a Pyoverdin Produced by Pseudomonas aeruginosa ATCC 27 853 (1993)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 83-87 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The primary structure of a pyoverdin (Pa TII) isolated from an iron deficient culture medium of Pseudomonas aeruginosa ATCC 27 853 has been elucidated by spectroscopic methods and degradation studies. Total assignment of 1H and 13C resonances as well as sequential information were achieved by two-dimensional NMR techniques: HOHAHA1, NOESY, HSQC and HMBC. The structure consists of the common pyoverdin chromophore 5-amino-2,3-dihydro-8,9-dihydroxy-1H-pyrimido [1,2-a]quinoline-1-carboxylic acid with succinic acid bound amidically to its amino group and the carboxyl group linked to the N-terminus of D-Ser-D(CHO) OHOrn-L-Orn-Gly-D-aThr-L-Ser-L-cOHOrn. According to the short-hand nomenclature suggested in [2, 3] the pyoverdin may be described as pyoverdin-Q-so′ OGtaSo′*-SUC.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19933350113
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Welkstoffe und Antibiotika. 34. Mitteilung. Synthese von IsojavanicinDie Bezifferung der Strukturformeln erfolgt aus Gründen der Übersichtlichkeit wie in der Javanicin-Reihe. und vereinfachte. Synthese von Javanicin (1965)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 48 (1965), S. 538-553 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus 1,2,4-Trimethoxybenzol (I) wurde das 2-Methyl-3-acetonyl-7-methoxynaphtazarin (Isojavanicin) (XIIe) synthetisiert, wobei als entscheidende Aufbaureaktion die Einführung des Acetonylrestes durch MICHAEL-Addition von Acetessigsäure-benzylester an das 2-Methyl-5,7,8-trimethoxy-1,4-naphtochinon (VIII) erfolgte. Entgegen unseren früheren Versuchen ermöglichte die analoge Anlagerungsreaktion an 3-Methyl-5,7,8-trimethoxy-1,4-naphtochinon (XVII) eine wesentliche Vereinfachung der Synthese des Javanicins (XXa). Erwartungsgemäss zeigten Javanicin (XXa) und Isojavanicin (XIIe) in UV., IR., NMR. und Massenspektrogramm keine oder nur geringe, strukturell noch nicht interpretierbare Unterschiede, während die Mischprobe der beiden Substanzen eine überraschend grosse Schmelzpunktdepression gab.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19650480312
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    Paper (German National Licenses)
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