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81Author    Ferdinand BelajRequires cookie*
 Title    Struktur von C2C16N4P2, dem R eaktionsprodukt von D icyandiam id mit PC15 Structure of C 2C16N4P2, the Reaction Product of Dicyandiamide with PC15  
 Abstract    The reaction product of dicyanodiamide with PC15 (1:2) is 2,2,4-trichloro-2,2-dihydro-6-trichlorophosphazeno-1.3,5,2A5-triazaphosphorine and not 2.4,6-trichloro-2,2-dihydro-2-trichlorophosphazeno-l,3,5,2A5-triazaphosphorine as reported in the literature. This is con­ firmed by an X-ray structure determination at 90K: Space group P 2,/c, a = 17.258(5), b = 9.664(3), c = 15.070(4) Ä, ß = 114.05(2)°, Z = 8, R = 3.99%. Both molecules of the asymmetric unit show about the same conformation with approximate C s-m -symmetry as was also obtai­ ned by semi-empirical MNDO calculations. The thermal motion analysis establishes that the molecules cannot be described as 'rigid bodies', and that the easy deformability of the exocyclic C-N-P angles allows the 'rigid' NPC13 tetrahedra to perform almost isotropic librations. 
  Reference    Z. Naturforsch. 51b, 1428—1432 (1996); eingegangen am 20. Februar 1996 
  Published    1996 
  Keywords    2, 24-Trichloro-2, 2-dihydro-6-trichlorophosphazeno-l, 3, 5, 2A5-triazaphosphorine Phosphaze­ ne, Crystal Structure, Thermal Motion Analysis 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1428.pdf 
 Identifier    ZNB-1996-51b-1428 
 Volume    51 
82Author    K. Shanm, K.J R Ajendra, PrasadRequires cookie*
 Title    Synthesis of 3-Phenylisoxazolo[3,4-a]carbazoles  
  Reference    Z. Naturforsch. 54b, 1202—1204 (1999); received April 19 1999 
  Published    1999 
  Keywords    l-Hydroxyimino-l, 2, 3, 4-tetrahydrocarbazoles, Claisen Aroylation, Aerial Oxidation, 3-Phenylisoxazolo[34-a]carbazoles 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1202.pdf 
 Identifier    ZNB-1999-54b-1202 
 Volume    54 
83Author    Hans Rausch, GeorgG. GrossRequires cookie*
 Title    Preparation of [14C]-LabeIled l,2,3,4,6-Penta-0-Gal!oyl-/?-D-Glucose and Related Gallotannins  
 Abstract    [U -14C]-Labelled 1,2,3,4,6-penta-O-galloyl-ß-D-glucose was prepared by photoassimilation of 14C 0 2 with leaves from staghorn sumac (Rhus typhina) in the presence of the herbicide glyphosate. Extracts of the plant material were partitioned against ethyl acetate and chro­ matographed on Sephadex LH-20, yielding a series o f crude tri-to decagalloylglucoses. The pentagalloylglucose fraction among these was further purified by HPLC to >99% purity and a specific radioactivity of 130 kBq (3.5 fiCi) per fimol. The ratio of the radioactivities in the glucose and galloyl moieties, respectively, suggested a uniform labelling pattern of the product. 
  Reference    Z. Naturforsch. 51c, 473 (1996); received February 8/March 8 1996 
  Published    1996 
  Keywords    [I4C]l, 2, 3, 4, 6-Penta-0-galloyl-ß-D-glucopyranose, Gallotannins, Photosynthesis, Rhus typhina, Staghorn Sumac 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0473.pdf 
 Identifier    ZNC-1996-51c-0473 
 Volume    51 
84Author    Martin Semara, HeidrunA. Nke3, Wolf-Rüdiger Arendholzb, Robert Veiten0, Wolfgang Steglich0Requires cookie*
 Title    Lachnellins A, B, C, D, and Naphthalene-l,3,8-triol, Biologically Active Compounds from a Lachnellula Species (Ascomycetes)  
 Abstract    In the course of our search for new biologically active metabolites, lachnellin A (1), a metabolite with high cytotoxic and antimicrobial activities, the structurally related lachnellins B. C and D (3, 4, 7), and naphthalene-l,3,8-triol (8), an inhibitor of malate synthase (EC 4.1.3.2), were isolated from submerged cultures o f the ascomycete Lachnellula sp. A 3 2 -8 9 . The antimicrobial, cytotoxic and phytotoxic activities of lachnellin A depended on its reactiv­ ity and could be abolished by the addition of cysteine. The enzyme inhibiting activity of (8) was due to reactive intermediates during melanization and was no longer observed in the presence of serum albumin. In addition, rac-scytalone (9), (+)-fra/7s-3,4-dihydro-3,4,8-trihy-droxy-l(2//)-naphtha!enone (10). 2,5-dihydroxytoluene (11), and (/?)-(-)-5-methylmellein (12) were obtained from the same source and biologically characterized. 
  Reference    Z. Naturforsch. 51c, 500 (1996); received March 1/April 29 1996 
  Published    1996 
  Keywords    Lachnellin A, B, C D Glyoxylate Cycle, N aphthalene-1, 3, 8-triol, Malate Synthase, Melanization, Lachnellula sp 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0500.pdf 
 Identifier    ZNC-1996-51c-0500 
 Volume    51 
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