Pd nanoparticle catalyzed heck arylation of 1,1-disubstituted alkenes in ionic liquid. Study on factors affecting the regioselectivity of the coupling process (Articolo in rivista)

Type
Label
  • Pd nanoparticle catalyzed heck arylation of 1,1-disubstituted alkenes in ionic liquid. Study on factors affecting the regioselectivity of the coupling process (Articolo in rivista) (literal)
Anno
  • 2003-01-01T00:00:00+01:00 (literal)
Alternative label
  • Calo´ V., Nacci A., Monopoli A., Detomaso A., Iliade P. (2003)
    Pd nanoparticle catalyzed heck arylation of 1,1-disubstituted alkenes in ionic liquid. Study on factors affecting the regioselectivity of the coupling process
    in Organometallics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Calo´ V., Nacci A., Monopoli A., Detomaso A., Iliade P. (literal)
Pagina inizio
  • 4193 (literal)
Pagina fine
  • 4197 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 22 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • fascicolo (21) (literal)
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Pd nanoparticle catalyzed heck arylation of 1,1-disubstituted alkenes in ionic liquid. Study on factors affecting the regioselectivity of the coupling process (literal)
Abstract
  • The Heck reaction of neutral or electron-rich aryl bromides with the 1,1-disubstituted olefins butyl methacrylate and á-methylstyrene catalyzed by Pd nanoparticles in tetrabutylammonium bromide as solvent and tetrabutylammonium acetate as base leads to a prevalent formation of the terminal olefin. In contrast, reaction of p-bromoacetophenone leads to the internal olefin. Whereas the solvent stabilizes the metal nanoclusters, the base is responsible for a fast neutralization of the PdH impeding the hybride readdition to reaction products and avoiding the olefin interconversion. The terminal olefins are efficiently converted into more stable internal E isomers by using tetrabutylammonium pivalate as catalyst. (literal)
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