Organic Letters · 2006 · 283 citations · 27 references
Natural SciencesChemical EngineeringChemistryCatalysisNanomaterialsSurface ScienceCatalyst CharacterizationCatalyst PreparationCatalyst StabilityCatalytic MaterialsNanocatalysisSurface Functionalization Of NanomaterialsCatalyst ImmobilizationHeck ReactionImmobilized CatalystsNanoparticlesPalladium CatalystsSilica Surface FunctionalizationSurface Chemistry Of SilicaThermal Stability
[reaction: see text] A new concept of simultaneous covalent anchoring of a N-heterocyclic carbene palladium/ionic liquid matrix on the silica surface and the application of the resulting catalyst in the Heck reaction of a variety of different haloarenes is described. The catalyst shows high thermal stability (up to 280 degrees C) and could be recovered and reused for four reaction cycles, giving a total TON congruent with 36 600. Furthermore, TEM coupled with EDX analysis indicate the formation of Pd nanoparticles within the immobilized IL layer.
27