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1979 (1)
1Author    Heinz Falk, Klaus ThirringRequires cookie*
 Title    Beiträge zur Chemie der Pyrrolpigmente, XXXIII [1] Darstellung, Struktur und Eigenschaften von isomeren N-Methyl-Bilatrienen-abc (N-Methyl-etiobiliverdine-IV-y) On the Chemistry of Pyrrole Pigments, XXXIII [1] Synthesis, Structure and Properties of Isomeric N-Methyl-bilatrienes-abc (N-Methyl-etiobiliverdines-IV-y)  
 Abstract    Methylation of etiobiliverdin-IV-y yields a ring-A N-methylated product the structure of which was proven by comparison with the corresponding monolactimether and the ring-B methylated product which was synthesized on an independent route. The configura-tion (Z,Z,Z) was deduced by iH-NMR experiments and a more or less helical conformation which is most twisted at the ring-A methine fragment was found. Photoisomerization exclusively takes place at this position giving the (E,Z,Z) diastereomer, a reaction which is discussed in terms of the correlation of light absorption, methine single bond twist and photochemical selectivity. 
  Reference    Z. Naturforsch. 34b, 1448—1453 (1979); eingegangen am 25. Mai 1979 
  Published    1979 
  Keywords    UY-VIS, iH-NMR, Photoisomerization, Configuration, Conformation 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1448.pdf 
 Identifier    ZNB-1979-34b-1448 
 Volume    34