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Cover Picture: A Recyclable Nanoparticle‐Supported Palladium Catalyst for the Hydroxycarbonylation of Aryl Halides in Water (Angew. Chem. Int. Ed. 10/2010)
Author(s) -
Wittmann Sebastian,
Schätz Alexander,
Grass Robert N.,
Stark Wendelin J.,
Reiser Oliver
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201000369
Subject(s) - halide , aryl , catalysis , palladium , decantation , nanoparticle , carbene , chemistry , pyrene , bimetallic strip , carbon fibers , magnetic nanoparticles , polymer chemistry , organic chemistry , materials science , nanotechnology , composite material , alkyl , composite number
Temperature‐dependent reversible immobilization of Pd catalysts on carbon‐coated, magnetic Co nanoparticles is facilitated by pyrene‐modified N‐heterocyclic carbene ligands. O. Reiser et al. show in their Communication on page 1867 ff. how this approach allows the efficient palladium‐catalyzed carboxlyation of aryl halides in water at 100 °C: In each of 16 cycles the catalyst is recovered onto the nanoparticles by cooling to room temperature. The nanoparticles are then separated from the mixture by magnetic decantation.