New Palladium Carbene Catalysts for the Heck Reaction of Aryl Chlorides in Ionic Liquids

The Heck reaction of aryl chlorides was investigated in the presence of defined monocarbenepalladium(0) complexes. Activated and nonactivated aryl chlorides provide the corresponding cinnamic esters and stilbenes in nBu4NBr as a ionic liquid in good to excellent yields.