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'13 C NMR Spectra' in keywords
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1980 (7)
21Author    Michael Morr, Ludger Ernst, Lutz GrotjRequires cookie*
 Title    2' ,3' -Dideoxy-3' -C-(phosphonomethyl)adenosine, the Phosphonate Analogue of 2'-Deoxyadenosine 3'-Phosphate  
 Abstract    The title compound 7 is prepared in a five-step synthesis starting from l,2-di-0-acetyl-5-0-benzoyl-3-deoxy-3-0-(diethoxyphosphonomethyl)-/3-D-ribofuranose (2). The preferred conformation of 7 is derived from its X H and 13 C NMR data. 
  Reference    Z. Naturforsch. 38b, 1665—1668 (1983); received July 6 1983 
  Published    1983 
  Keywords    Nucleotide Analogue, Phosphonate, !H NMR Spectra, 13 C NMR Spectra, 31 P NMR Spectra, Conformation 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1665.pdf 
 Identifier    ZNB-1983-38b-1665 
 Volume    38 
22Author    Gerhard Maas, Berndt SingerRequires cookie*
 Title    Dikationether  
 Abstract    , 6 [1] Spektroskopische Vergleiche von 9,9'-Oxy-bis(acridinium)-und 9,9'-Thio-bis(acridinium)-Salzen mit anderen 9-substituierten Acridinium-Ionen Dication Ethers, 6 [1] Spectroscopic Comparisons of 9,9'-Oxy-bis(acridinium)-and 9,9'-Thio-bis(acridinium) Salts with Other 9-Substituted Acridinium Ions 
  Reference    (Z. Naturforsch. 40b, 90—99 [1985]; eingegangen am 18. Juli 1984) 
  Published    1985 
  Keywords    Bis(acridinium) Ethers, 9-Substituted Acridinium Ions, 13 C NMR Spectra, UV Spectra, 'H NMR Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0090.pdf 
 Identifier    ZNB-1985-40b-0090 
 Volume    40 
23Author    Wolfgang Voelter, AdemirFarias Morel, Atta-Ur-Rahman, Muhammad Munawer, QureshiH E JRequires cookie*
 Title    Studies on the Peptide Alkaloids of Discaria febrifuga  
 Abstract    A new tryptophan-containing peptide alkaloid, "discarin-K", has been isolated from Discaria febrifuga, a shrub growing in Brazil, Argentina and Uruguay. Its structure has been determined as 1 on the basis of spectral studies. Another peptide alkaloid, franganin, was also isolated from the same plant and its 'H NMR and 13 C NMR have been studied using COSY-45, 2 D-J resolved and DEPT techniques. 
  Reference    Z. Naturforsch. 42b, 467—472 (1987); received November 28 1986 
  Published    1987 
  Keywords    Discaria febrifuga, Discarin-K, Franganin, 13 C NMR Spectra, 2D NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0467.pdf 
 Identifier    ZNB-1987-42b-0467 
 Volume    42 
24Author    ViqarUddin Ahmad, Q. Najmus-Saqib, K. Usmanghani, W. Fuchs, W. VoelterRequires cookie*
 Title    New Triterpenoid from Primula denticulata  
 Abstract    From the alcoholic extract of the plant Primula denticulata four main compounds could be isolated by column chromatography: Pri-dentigenin A, B, C and D. Several spectroscopic methods and the synthesis of several derivatives allow to determine the structure of Pridenti-genin B. 
  Reference    Z. Naturforsch. 35b, 511—512 (1980); eingegangen am 27. Dezember 1979 
  Published    1980 
  Keywords    Triterpenoids, Primula denticulata, Structure Elucidation, X H NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0511_n.pdf 
 Identifier    ZNB-1980-35b-0511_n 
 Volume    35 
25Author    Rolf Appel, Ulrich BaumeisterRequires cookie*
 Title    Darstellung Diorganylamino-substituierter Carbodiphosphorane [1] Synthesis of Diorganylamino Substituted Carbodiphosphoranes [1]  
 Abstract    Aminolysis of the P-chlorofunctional carbodiphosphorane Ph3P = C = PPI12CI (1) affords the diorganylamino substituted phosphonium salts PI13P—CH—PPh2(NR2)] + Cl~ (3a-e, R = alkyl), which can be dehydrohalogenated in good yield by NaH to give the neutral compounds Ph3P = C — PPli2(NR2) (4a-e). The structure of the hitherto unknown amino-carbodiphosphoranes has been confirmed by 31 P{ 1 H} and 13 C{ 1 H} NMR data as well as by hydrolysis to give 5, hydrochlorination to 6b, e and methylation to 7 a, e. 
  Reference    Z. Naturforsch. 35b, 513—516 (1980); eingegangen am 7. Dezember 1979 
  Published    1980 
  Keywords    Carbodiphosphoranes, Diorganylamino Substitution, Base Reaction, 13 C NMR Spectra, 31 P NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0513.pdf 
 Identifier    ZNB-1980-35b-0513 
 Volume    35 
26Author    R. Radeglia, S. L. Spassov, R. Stefanova, S. D. SimovaRequires cookie*
 Title    Verschiebungen in para-substituierten 3-Phenylpropan8äure-methylestern The Transmission of Substituent-Induced 13 C NMR Chemical Shifts in para-Substituted 3-Phenyl Propanoic Acid Methyl Esters  
 Abstract    Carbon-13 chemical shifts have been measured of joara-substituted 3-phenyl propanoic acid methyl esters. The substituent-induced 13 C shifts of the side chain were related to Hammett substituent effects by the dual substituent para-meter method. The transmission of substituent effects and the factors that influence 13 C shifts are discussed. 
  Reference    Z. Naturforsch. 35b, 934—936 (1980); eingegangen am 14. Januar 1980 
  Published    1980 
  Keywords    Dual Substituent Parameters, Polar and Steric Interactions, Conformational Energy, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0934_n.pdf 
 Identifier    ZNB-1980-35b-0934_n 
 Volume    35 
27Author    Gerhard Hägele, Detlef Wendisch, ++, Reiner Luckenbach, Hans-H BechtolsheimerRequires cookie*
 Title    Kernresonanzspektroskopische Untersuchungen an t-Butyl-phenyl-phosphinsäure-(—)-menthylester, II [1] 1 H-, 13 C-und 31 P-NMR-Analyse der absoluten Konfiguration am Phosphoratom NMR Spectroscopic Investigations on £-Butyl-phenyl-phosphinic Acid(—)-Menthyl Ester, II [1] 1 H, 13 C and 31 P NMR Analysis of Absolute Configuration at the Phosphorus Center  
  Reference    Z. Naturforsch. 35b, 1182—1190 (1980); eingegangen am 19. Mai 1980 
  Published    1980 
  Keywords    (—)-Menthol, Diastereomeric Menthylesters of Phosphinic Acids, 31 P NMR Spectra, 13 C NMR Spectra, Double Resonance 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1182.pdf 
 Identifier    ZNB-1980-35b-1182 
 Volume    35 
28Author    Joachim Firl, Heinz Braun, Anton Amann, Robert BarnertRequires cookie*
 Title    und Bindungsverhältnisse von Enaminosulfoniumsalzen Dynamic Behaviour, Conformation and Bonding of Enaminosulfonium Salts  
 Abstract    The rotational barriers about the C-N single bond of the enaminosulfonium salts 1-6 are measured. Their magnitudes are related to the jr-donor strength of the NR2 group. For the unsymmetrically substituted compounds 7-12 the rotational equilibria are determined. In the case of the monoalkyl compounds 7-10 the more crowded s-cis-rotamers turn out to be the more stable conformations. Furthermore, the 13 C chemical shifts of the sulfonium salts 1-16 are reported. The shift differences ö(s-cis-s-trans) for the a-carbons of the N-alkyl groups seem to depend on the dihedral angle between the vinyl group and the C-H(°-c > bonds. Moreover, the spectra reveal that enaminosulfonium salts posses a high degree of ylide character. 
  Reference    Z. Naturforsch. 35b, 1406—1414 (1980); eingegangen am 20. Juni 1980 
  Published    1980 
  Keywords    Enaminosulfonium Salts, 13 C NMR Spectra, Rotational Barriers, Rotational Equilibria, Ylide Character 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1406.pdf 
 Identifier    ZNB-1980-35b-1406 
 Volume    35