SciELO - Scientific Electronic Library Online

 
vol.65SnO2/SiO2 nanocomposite catalyzed one-pot, four-component synthesis of 2-amino-3-cyanopyridinesUtilization of ionic liquids for the separation of organic liquids from industrial effluents índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


South African Journal of Chemistry

versión On-line ISSN 1996-840X
versión impresa ISSN 0379-4350

Resumen

RAFIEE, Ezzat; ZOLFAGHARIFAR, Zohreh; JOSHAGHANI, Mohammad  y  EAVANI, Sara. Dodecatungstocobaltate and Sn (IV)-substituted polyoxometalate: Preparation, characterization and catalytic performances in solventless synthesis of bis(indolyl)methanes. S.Afr.j.chem. (Online) [online]. 2012, vol.65, pp.138-144. ISSN 1996-840X.

Electrophilic substitution reaction of indole with various aldehydes and cyclohexanone were carried out in the presence of electron-transfer (K5CoW12O40.3H2O) and green Lewis acid ([(n-C4H9)4N]3PMo2W9(Sn4+.H2O)O39) catalysts. These catalysts were characterized by N2-adsorption measurements, FT-IR, UV-Vis, 31P NMR, TGA, cyclic voltammetry and elemental analysis. Mechanisms for their catalytic activity are proposed. Both of these catalysts can be recovered and reused.

Palabras clave : Dodecatungstocobaltate; Sn (IV)-substituted polyoxometalate; bis(indolyl)methanes; electrophilic substitution; solvent-free conditions.

        · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons