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'UV spectra' in keywords Facet   Publication Year 1983  [X]
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1983[X]
1Author    Jürgen Schallenberg, Eckart MeyerRequires cookie*
 Title    Simple Syntheses of 3-Substituted Indoles and their Application for High Yield 14 C-Labelling  
 Abstract    Methods are described which allow the synthesis of several plant indole alkaloids and their metabolites at different scales. Compounds synthesized include gramine (1) (3-di-methylaminomethylindole) which is directly derived from indole, while its biosynthetic precursors 3-aminomethylindole (3) and 3-methylaminomethylindole (2) as well as indole-3-carboxylic acid (7) are synthesized via indole-3-aldehyde (6). Slight changes of the experimental conditions allow syntheses with high yields not only at the molar but also at the /imolar level. This is extremely useful when isotope labelled compounds of high specific radioactivity are required for studies of plant metabolism. 
  Reference    (Z. Naturforsch. 38b, 108—112 [1983]; received July 22 1982) 
  Published    1983 
  Keywords    3-Substituted Indoles, Indole Alkaloids, UV Spectra, MS Spectra, 1 H NMR spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0108.pdf 
 Identifier    ZNB-1983-38b-0108 
 Volume    38 
2Author    Jochen Ellermann, AlfonsA M DemuthRequires cookie*
 Title    Chemistry of Poly functional Molecules, 75 [1] The Reaction of 5-Bromo-uracil with Sodium Diphenylphosphide  
 Abstract    5-Bromo-uracil (1) reacts with sodium diphenylphosphide or a mixture of sodium diphenylphosphide and sodium amide in liquid ammonia to give sodium 5-bromo-uracilate (5 a). From water 5 a crystallizes with one mole H2O yielding 5b. Treatment of 5 a with D2O yields sodium 5-bromo-N-deutero-uracilate-D20 (1/1) (5 c). With chlorodiphenyl-phosphine 5a forms 1-diphenylphosphino-uracil (2). 5a, b, c show N(l)-N(3)-(H/D)-tauto-merism in concentrated D2O solutions already, but in DMSO or Dö-DMSO only in dilute solutions. All the compounds were characterized by infrared, Raman, X H NMR, UV spectra and conductometry. 
  Reference    Z. Naturforsch. 38b, 1568—1574 (1983); eingegangen am 6. Juni/2. August 1983 
  Published    1983 
  Keywords    Sodium 5-Bromo-uracilates, Deutero Derivatives, Tautomerism, NMR Spectra, UV Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1568.pdf 
 Identifier    ZNB-1983-38b-1568 
 Volume    38