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1995 (1)
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1Author    Dieter StrackRequires cookie*
 Title    Enzymatic Synthesis of 1-Sinapoylglucose from Free Sinapic Acid and UDP-Glucose by a Cell-Free System from Raphanus sativus Seedlings  
 Abstract    Protein extracts from seedlings of Raphanus sativus catalyze the transfer of the glucosyl moiety of UDP-glucose to the carboxyl group o f phenolic acids. Enzymatic activity was determined spec-trophotometrically by measuring the increase in absorbance at 360 nm and/or by the aid of high performance liquid chromatography (HPLC). From 12 phenolic acids tested as acceptors, sinapic acid was by far the best substrate. The glu-cosyltransfer to sinapic acid has a pH optimum near 7 and requires as SH group for activity, p-Chloromercuribenzoate (PCMB) inhibits activity, which can be restored by the addition of di-thiothreitol (DTT). The formation o f 1-sinapoylglucose was found to be a reversible reaction, sin­ ce the addition of UDP results in a breakdown o f the ester. 
  Reference    Z. Naturforsch. 35c, 204—2 (1980); received December 28 1979 
  Published    1980 
  Keywords    Raphanus, Brassicaceae, Phenylpropanoid Metabolism, Glucose Ester, Esterification 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0204.pdf 
 Identifier    ZNC-1980-35c-0204 
 Volume    35 
2Author    W. Aldemar, A., Chrisostomos Babatsikos3, Giuseppe CilentobRequires cookie*
 Title    Functionalized 1,2-Dioxetanes as Potentially Useful Biological and Chemotherapeutic Agents  
 Abstract    H ydroxym ethyl-substituted 1,2-dioxetanes (3) have been converted in reasonable yields (10—40%) into the carboxylate-substituted 1,2-dioxetanes (4) by means of the Brew ster—Ciotti or 
  Reference    Z. Naturforsch. 39b, 679 (1984); received D ecem ber 8 1983 
  Published    1984 
  Keywords    D ioxetanes, Esterification, Photoaffinity Labeling, Excited Carbonyl Products, Chemi-energization 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0679.pdf 
 Identifier    ZNB-1984-39b-0679 
 Volume    39 
3Author    ProfRequires cookie*
 Title    Funktionalisierte tripod-Liganden mit Neopentan-Grundgerüst: Umsetzung von HOCH2C(CH2PR 2)3 mit Elektrophilen  
 Abstract    Several ways to functionalize hydroxy-rn'pod-ligands (H O C H 2C (C H 2PR2)3) by activation with electrophiles are presented. The use o f carboxylic halides and anhydrides is shown to be generally successful for esterification reactions in a one-pot synthesis starting from the oxetanes 0 (C H 2)2C(CH2PR2)2. Facial coordinaton of the related esters towards iron(II) and molybdenum(O) can be achieved depending on the nature of the phosphane donor groups. If methyliodide or trimethylsilylchloride are used as electrophiles in order to functionalize the hydroxy group in H O CH 2C (CH 2PR2)3, it is necessary to proctect the phosphane groups by formation of the tris-borane adduct. All new compounds have been fully characterized by the usual analytical techniques as well as by X-ray analyses on selected examples. 
  Reference    Z. Naturforsch. 50b, 1287—1306 (1995); eingegangen am 20. Januar 1995 
  Published    1995 
  Keywords    Functionalized Neopentane Compound, Esterification, Phosphane-Boranes, Iron Complexes, M olybdenum Complexes 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1287.pdf 
 Identifier    ZNB-1995-50b-1287 
 Volume    50