Process for regenerating Pd catalysts

摘要

Process for regenerating a Pd catalyst after a homogeneously catalyzed C-C coupling reaction in which the Pd catalyst precipitates, is separated from the reaction mixture and subsequently treated with I₂ or Br₂. The Pd catalyst can then be used in a subsequent reaction run. Preferably between 1 and 3 mole equivalents of I₂ or Br₂, relative to the quantity of Pd catalyst is used The C-C coupling reaction is preferably carried out in the presence of a support material. The C-C coupling reaction may be for example a Heck reaction, a Suzuki reaction or a cross-coupling reaction.