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  • 1
    Electronic Resource
    Electronic Resource
    1,2-bis-Dipyrrinon-9-yl-ethene — a novelb-homo-verdian chromophore: the reaction of 9-methyl-10H-dipyrrin-1-ones with bromine (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 983-991 
    Details
    ISSN: 1434-4475
    Keywords: 1,2-bis-Dipyrrinon-9-yl-ethene ; b-homo-Verdin ; Mesobiliverdin-XIIIα
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von 9-Methyl-10H-dipyrrin-1-onen mit Brom in Dichlormethan ergab in mäßigen Ausbeuten rotgefärbte Gallenfarbstoffderivate. Sie konnten strukturell als 1,2-bis-Dipyrrinon-ethene zugeordnet werden, die ein Beispiel für die bisher unbekanntenb-Homoverdine darstellen. Darüber hinaus konnten aus der Reaktionsmischung die entsprechenden Mesobiliverdine-XIIIα isoliert werden. Die mechanistischen Aspekte dieser Reaktion werden diskutiert.
    Notes: Summary Upon treatment of 9-methyl-10H-dipyrrin-1-ones with bromine in dichloromethane, red bile pigment derivatives were obtained in moderate yields. They were structurally assigned as 1,2-bis-dipyrrinon-9-yl-ethenes, which are examples of the hitherto unknownb-homo-verdins. In addition, the correspondingmeso-biliverdins-XIIIα could be isolated from the reaction mixture. The mechanistic aspects of the reaction are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811018
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  • 2
    Electronic Resource
    Electronic Resource
    On the chemistry of pyrrole pigments, XCV: 1,4-bis-(dipyrrinone-9-ylidene)-butene-2 — A novelb-homo-verdin chromophore (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 1323-1329 
    Details
    ISSN: 1434-4475
    Keywords: 1,4-bis-(Dipyrrinone-9-ylidene)-1,3-butene ; Dipyrrinone ; b-homo-Verdin ; Synthesis ; Spectroscopy ; Protonation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung 1,4-bis-(Dipyrrinon-9-yliden)-buten-2, ein verdinoides, in Position 10 extendiertes System, wurde durch Kondensation eines in Position 9 unsubstituierten Dipyrrinons mit 2,5-Dihydro-2,5-dimethoxy-furan oder 2,5-Dimethoxy-tetrahydrofuran synthetisiert. Die chemischen und spektroskopischen Eigenschaften dieses neuen chromophoren Systems werden diskutiert.
    Notes: Summary 1,4-bis-(Dipyrrinone-9-ylidene)-butene-2, a verdinoid system extended at C-10, was synthesized by condensing a dipyrrinone unsubstituted in position 9 with 2,5-dihydro-2,5-dimethoxyfuran or 2,5-dimethoxy-tetrahydrofuran. The chemical and spectroscopic properties of this novel chromophoric system are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807061
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    Paper (German National Licenses)
    Fulltext
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