1: With RuCl2(tricyclohexylphosphine)2(benzylidene) in benzene T=40°C; 2 h; Inert atmosphere; 2: With tert.-butylhydroperoxide in decane; benzene 3.25 h; Inert atmosphere; regioselective reaction;

bis(tricyclohexylphosphine)benzylidene ruthenium(IV) dichloride in dichloromethane 2 h; Ambient temperature;