1: With [RhCl(η2:η2-cycloocta-1,5-diene)]2; tetrabutyl ammonium fluoride; copper diacetate; triphenylphosphine in toluene T=20°C; 2 h; 2: With water in toluene T=110°C; 12 h;

scandium tris(trifluoromethanesulfonate); [bmim][SbF6] T=85°C; Friedel-Crafts alkenylation; 2 h; Title compound not separated from byproducts;

dipotassium peroxodisulfate; palladium diacetate; acetic acid in acetonitrile T=80°C; 7 h; SolventTime; Overall yield = 84 percent; Overall yield = 515 mg;

dipotassium peroxodisulfate; palladium diacetate; acetic acid T=80°C; 24 h; Overall yield = 76 percent;