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'Pyridine' in keywords Facet   Publication Year 1999  [X]
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1Author    BerndW. Rackmeyer1 ', Saqib Alib, Wolfgang Storch0, Martina VosteencRequires cookie*
 Title    2-[N,N-Bis(trimethylstannyl)amino]pyridine and Bis[N-(N-trimethyIsiIyI- 2-aminopyridyI)]dimethyltin -Intramolecular N-Sn Co-ordination  
 Abstract    2-[N,N-Bis(trimethylstannyl)amino]pyridine (1), bis[N-(N-trimethylsilyl-2-aminopyridyl)]-dimethyltin (2) and bis[N-(N-trimethylsilyl-2-amino-3-methyl-pyridyl)]dimethyltin (3) were prepared and characterized by 'H, i3C, l5N, 29Si and ll9Sn NMR spectroscopy. In the case of 1, intramolecular pyridine-N-Sn co-ordination was established by the low temperature ll9Sn NMR spectra which show two resonance signals, one for a penta-co-ordinate and one for a tetra-co-ordinate tin site. In the cases of 2 and 3, intramolecular pyridine-N-Sn co-ordination follows conclusively from l3C, l5N and ll9Sn NMR parameters. In contrast with the known behaviour of the corresponding trimethyltin derivative, the methyl group in 3-position of the pyridine ring does not prevent this type of co-ordination in 3. 
  Reference    Z. Naturforsch. 54b, 1165—1169 (1999); received June 17 1999 
  Published    1999 
  Keywords    Tin, Amines, Pyridine, Co-ordination, NMR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1165.pdf 
 Identifier    ZNB-1999-54b-1165 
 Volume    54 
2Author    SanaaM. EldinRequires cookie*
 Title    Cyanothioacetamide and its Derivatives in Heterocyclic Synthesis: A New Route for the Synthesis of Several Pyridine and Thieno[2,3-b]pyridine Derivatives and their Biological Evaluation  
 Abstract    Several new pyridine and thieno[2,3-b]pyridine derivatives were synthesized via the reac­ tions of some pyridinethiones, obtained by the action of acetylacetone on some thiocarbox-amidocinnamonitriles, with halogenated esters and ketones. Structures were established based on elemental and spectral data. All the synthesized compounds were tested for their biological activity. 
  Reference    Z. Naturforsch. 54b, 674 (1999); received N ovem ber 9 1998 
  Published    1999 
  Keywords    Pyridines, Thieno[2, 3-b]pyridines, Cyanothioacetamide, Thiocarboxamido-cinnamonitriles, Michael Condensations 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0674.pdf 
 Identifier    ZNB-1999-54b-0674 
 Volume    54 
3Author    M. M. Mashaly3, M. HammoudabRequires cookie*
 Title    New Simple and One-Pot Synthetic Routes to Polyfunctionally Substituted Pyridines; 1,4-Dihydropyridazines and 4H-l,2-Oxazine  
  Reference    Z. Naturforsch. 54b, 1205—1209 (1999); received February 15 1999 
  Published    1999 
  Keywords    Arylidenemalononitriles, 2-Cyano-1, 1 -diaminoethene, Arylhydrazones, s_y«-2-Pyridinealdoxime, Pyridines 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1205.pdf 
 Identifier    ZNB-1999-54b-1205 
 Volume    54