Startseite Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent
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Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent

  • M. Percino EMAIL logo , Víctor Chapela , Ling-Fa Montiel , Enrique Pérez-Gutiérrez und José Maldonado
Veröffentlicht/Copyright: 31. März 2010
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Chemical Papers
Aus der Zeitschrift Chemical Papers Band 64 Heft 3

Abstract

An efficient Knoevenagel route using green chemistry conditions was applied for the synthesis of halogen- and cyano- substituted pyridinevinylene compounds. Absorption and fluorescence emission spectra of these conjugated compounds were recorded and compared in order to evaluate the effect of substituents on the electronic properties of pyridinevinylene compounds. The substituents studied were terminal Cl and F, two or three aromatic rings, as well as a cyano group attached to a C=C double bond. The compounds synthesized are: (E)-2-(4-fluorostyryl)pyridine, (E)-2-(4-chlorostyryl)pyridine, (E)-4-(4-chlorostyryl)pyridine, 2,3-diphenylacrylonitrile, 3-phenyl-2-(pyridin-2-yl)acrylonitrile, 3-phenyl-2-(pyridin-3-yl)acrylonitrile, 2-phenyl-3-(pyridin-2-yl)acrylonitrile, 3,3′-(1,4-phenylene)bis(2-phenylacrylonitrile), 3,3′-(1,4-phenylene)bis(2-(pyridin-2-yl)acrylonitrile), and 3,3′-(1,4-phenylene)bis(2-(pyridin-3-yl)acrylonitrile). The solvent-free method used in this work allows obtaining each compound by controlling the reaction temperature. The compounds were characterized by infrared spectroscopy and 1H-NMR spectroscopy.

Keywords: pyridinevinylenes; solvent free synthesis; Knoevenagel condensation

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Published Online: 2010-3-31
Published in Print: 2010-6-1

© 2009 Institute of Chemistry, Slovak Academy of Sciences

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  3. A simple turbidimetric flow injection system for saccharin determination in sweetener products
  4. Determination of metoprolol tartrate by capillary isotachophoresis
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  7. Synthesis, DNA binding, and antimicrobial studies of novel metal complexes containing a pyrazolone derivative Schiff base
  8. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 4-cyanopyridine Cu4OBrnCl(6−n)(4-CNpy)4 complexes
  9. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 3-cyanopyridine Cu4OBrnCl(6−n)(3-CNpy)4 complexes
  10. Deposition and release of chlorhexidine from non-ionic and anionic polymer matrices
  11. Synthesis of new antimicrobial 4-aminosubstituted 3-nitrocoumarins
  12. Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent
  13. Chemical composition and antimicrobial activity of Erodium species: E. ciconium L., E. cicutarium L., and E. absinthoides Willd. (Geraniaceae)
  14. Photo-Fenton and photo-Fenton-like processes for the degradation of methyl orange in aqueous medium: Influence of oxidation states of iron
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https://doi.org/10.2478/s11696-010-0012-z
Schlagwörter für diesen Artikel
pyridinevinylenes; solvent free synthesis; Knoevenagel condensation

Artikel in diesem Heft

  1. A proposal of reference values for relative uncertainty increase in spectrophotometric analysis of pharmaceutical formulations
  2. Spectrophotometric quantification of fluoxetine hydrochloride: Application to quality control and quality assurance processes
  3. A simple turbidimetric flow injection system for saccharin determination in sweetener products
  4. Determination of metoprolol tartrate by capillary isotachophoresis
  5. Model predictive control of a CSTR: A hybrid modeling approach
  6. Application of extended NRTL equation for ternary liquid-liquid and vapor-liquid-liquid equilibria description
  7. Synthesis, DNA binding, and antimicrobial studies of novel metal complexes containing a pyrazolone derivative Schiff base
  8. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 4-cyanopyridine Cu4OBrnCl(6−n)(4-CNpy)4 complexes
  9. Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 3-cyanopyridine Cu4OBrnCl(6−n)(3-CNpy)4 complexes
  10. Deposition and release of chlorhexidine from non-ionic and anionic polymer matrices
  11. Synthesis of new antimicrobial 4-aminosubstituted 3-nitrocoumarins
  12. Spectroscopic characterization of halogen- and cyano-substituted pyridinevinylenes synthesized without catalyst or solvent
  13. Chemical composition and antimicrobial activity of Erodium species: E. ciconium L., E. cicutarium L., and E. absinthoides Willd. (Geraniaceae)
  14. Photo-Fenton and photo-Fenton-like processes for the degradation of methyl orange in aqueous medium: Influence of oxidation states of iron
  15. Voltammetry of resazurin at a mercury electrode
  16. Effect of dielectric medium on angiotensin converting enzyme inhibitors binding to Zn2+
  17. HPLC analysis of a syrup containing nimesulide and its hydrolytic degradation product
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