N-heterocyclic carbene catalyzed etherification

Due to their catalytic properties toward organic reactions, synthesis of transitionmetal complexes with N-heterocyclic carbene (NHC) ligands have gained lots ofattention lately. These type of complexes could be used in C-C coupling reactions, suchas Suzuki, Heck and Sonogashira, olefin metathesis, hydrosilylation, C-H, C-N and C-Obond activation as a catalyst. The biarylethers which obtained from C-O bond formationhave been used in polymer industry, antitumor compounds and in science. The catalyticactivity has been changed depending upon structure and the number of NHC?s and thestructure of substituted NHC ring. For this reason, cyclohexyl substituted carbeneprecursors and their palladium complexes have beeen prapared in this work. Thesebenzimidazolium salts have been tested catalytic activity in C-O bond formation.