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1984 (1)
1979 (1)
1Author    DennisG. Brown, WilliamJ. HughesRequires cookie*
 Title    Copper(II) Complexes Containing 3-n-Nonylcatechol: Preparation and Ligand Oxidation  
 Abstract    Ternary copper(II) complexes containing the dianion of 3-n-nonylcatechol and a number of bidentate nitrogen containing counter ligands have been prepared and charac-terized. It has been demonstrated that, in the presence of oxygen, the catecholato ligand undergoes intradiol ring cleavage in a fashion similar to that carried out by intradiol aromatic dioxygenases. The 3-n-nonylcatecholato ligand was chosen as an analog for the naturally occuring 3-pentadecylcatechols or "urushiols" which are the active allergens in plants such as poison ivy. 
  Reference    Z. Naturforsch. 34b, 1408—1412 (1979); received June 19 1979 
  Published    1979 
  Keywords    Copper, Dioxygenase, Urushiol Model, Catechol 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1408.pdf 
 Identifier    ZNB-1979-34b-1408 
 Volume    34 
2Author    R. R. Br, G. Spribille, ForkmannRequires cookie*
 Title    Conversion of Dihydroflavonols to Flavonols with Enzyme Extracts from Flower Buds of Matthiola incana  
 Abstract    Soluble enzyme preparations from flower buds of Matthiola incana catalysed the conversion of dihydrokaempferol to kaempferol and of dihydroquercetin to quercetin. The reaction required 2-oxoglutarate, ascorbate and Fe2+ as cofactors and had a pH-optimum at about 7.0. Highest enzyme activity was already present in the youngest buds followed by a rapid decline during bud and flower development. Furthermore, a substantial correlation was observed between the enzyme activity for flavonol formation and the flavonol content of the buds and flowers. 
  Reference    Z. Naturforsch. 39c, 714—719 (1984); received April 4/May 23 1984 
  Published    1984 
  Keywords    Dioxygenase, Flavonoid Biosynthesis, Flavonols, Matthiola incana 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-0714.pdf 
 Identifier    ZNC-1984-39c-0714 
 Volume    39