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1999[X]
1Author    SanaaM. EldinRequires cookie*
 Title    Reactions of Cyanothioacetamide Derivatives with 2-Hydrazinothiazol-4(5//)-one: Synthesis, Cyclization and Biological Evaluation of Several New Annelated Pyran, Thiazole, 1,2,4-Triazole and 1,2,4-Triazine Derivatives  
 Abstract    The thiocarboxamidocinnamonitriles (2) reacted with 2-hydrazinothiazol-4(5//)-one (3) to afford the corresponding pyrano[2,3-d]thiazoles (6). Compounds 6 were used for the synthe­ sis of several new annelated pyran, thiazole, 1,2,4-triazole and 1,2,4-triazine derivatives via their reactions with chloroacetic acid, ethyl chloroformate, diethyl oxalate and acetylacetone. Structures were established based on elemental and spectral data studies. Some of the newly synthesized heterocyclic derivatives were tested for their antimicrobial activity. 
  Reference    Z. Naturforsch. 54b, 1589—1597 (1999); received July 2 1999 
  Published    1999 
  Keywords    Thiocaboxamidocinnamonitriles, Pyrans, Thiazoles, 1, 2, 4-Triazoles, 1, 2, 4-Triazines 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1589.pdf 
 Identifier    ZNB-1999-54b-1589 
 Volume    54 
2Author    Joachim Pickardt, Benedikt StaubRequires cookie*
 Title    Metallkomplexe mit 2,2'-Dipyridylamin als Liganden: Kristallstrukturen der Komplexe mit CdX2 (X = Cl, Br, I) und CuCN Metal Complexes with 2,2'-Dipyridylamine as Ligand: Crystal Structures o f the Com plexes with CdX2 (X = Cl, Br, I) and CuCN  
 Abstract    Reactions of 2,2'-dipyridylamine (dpyam) with cadmium halides yield crystals of [Cd(dpyam)(H20)C l2] (1), [Cd(dpyam)Br2] (2), and [Cd(dpyam)I2] (3). With CuCl2 and KCN a complex [C u(dpyam)C N ]H 20 (4) is obtained. Depending on the size of the halide ions the coordination changes from octahedral in 1 to trigonal bipyramidal in 2 and tetrahedral in 3. The coordination in 4 is trigonal. Due to the geometric strain imposed by the ligand all coordination polyhedra show significant distortions. 1 and 2 form dimers by halide bridges. With the excep­ tion of 3 all compounds form "supramolecular" structures via hydrogen bonds, e.g. chains or networks. 
  Reference    Z. Naturforsch. 54b, 329—336 (1999); eingegangen am 10. Dezember 1998 
  Published    1999 
  Keywords    2, 2'-Dipyridylamine Complexes, Cadmium Halides, Copper(I) Cyanide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0329.pdf 
 Identifier    ZNB-1999-54b-0329 
 Volume    54 
3Author    R. An D, H. Swellem, YehiaA A Lla, G. Alal, A.M N Aw, W. ArRequires cookie*
 Title    Cinnamoylacetonitrile in Heterocyclic Synthesis, Part 7 [1]. Simple Synthesis of Benzothiazepines, Pyrones and Oxazolopyridine  
 Abstract    A facile synthesis of the entitled compounds is reported starting with cinnamonitrile. 
  Reference    Z. Naturforsch. 54b, 1197—1201 (1999); received March 3 1999 
  Published    1999 
  Keywords    Cinnamoylacetonitrile, 2, 4-Diarylbenzothiazepines, Dehydrogenation, Tetra-chloro-o-benzoquinone, Acylation 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1197.pdf 
 Identifier    ZNB-1999-54b-1197 
 Volume    54 
4Author    A. Rto, M. Aaninena, R. Ené, T. B. Oeré, Tristram Chivers0, M. Asood ParvezcRequires cookie*
 Title    Preparation and X-Ray Structure of 4-N,N'-Bis(trimethylsilyl)- amino-3,5-diisopropylphenylselenium Trichloride  
 Abstract    The reaction of SeCU or SeCF with /V,/V'-bis(trimethylsilyl)-2,6-diisopropylaniline occurs not at the nitrogen atom but by electrophilic aromatic substitution at C-4 of the phenyl ring to give [(CH3)3Si]2NC6 H2('Pr:)SeCl3, which crystallizes as the chloro-bridged dimer in the triclinic system, space group P i, a -10.2598(17), b = 13.665(3), c = 9.7838(10) A, a = 90.056(13), ß = 102.439(11), 7 = 70.922(14)°, V = 1262.3(4) A \ Z = 1. The dimer contains an essentially planar CUSe^-Cl^SeCU unit, with trans apical (Me3SihNC6H2('Pr)2 groups, resulting in approximately square pyramidal geometry at Se. The bridging Se-Cl distances are unequal at 2.587(2) and 2.749(2) A. 
  Reference    Z. Naturforsch. 54b, 1170—1174 (1999); received April 22 1999 
  Published    1999 
  Keywords    Crystal Structure, 2, 6-Diisopropylaniline, Aryl Selenium Trichloride, Bridging Chloride, NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1170.pdf 
 Identifier    ZNB-1999-54b-1170 
 Volume    54 
5Author    R. Balamurali, K.J Rajendra PrasadRequires cookie*
 Title    A Facile Synthesis of Quino[2,3-fl]carbazoles  
 Abstract    Condensation of l-oxo-l,2,3,4-tetrahydrocarba-zoles la-e and o-aminoacetophenone 2 under acid catalysis afforded a new class of quino[2,3-a]car-bazoles 3a-e in good yields. A plausible mecha­ nism for the product formation is also proposed. 
  Reference    Z. Naturforsch. 54b, 1618—1620 (1999); received June 14 1999 
  Published    1999 
  Keywords    l-Oxo-l, 2, 34-tetrahydrocarbazole, o-Amino-acetophenone Condensation, Cyclisation, Aerial Oxidation 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1618_n.pdf 
 Identifier    ZNB-1999-54b-1618_n 
 Volume    54 
6Author    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