potassium carbonate; lithium chloride; palladium diacetate in N,N-dimethyl-formamide T=65°C;

silver hexafluoroantimonate; [Ru2(p-PriC6H4Me)2(μ-Cl)Cl]2; copper (II) acetate monohydrate in methanol; dichloromethane T=100°C; 12 h; Inert atmosphere; regioselective reaction;

[Ru2(p-PriC6H4Me)2(μ-Cl)Cl]2; copper (II) acetate monohydrate in 1,1-dimethylpropan-1-ol T=120°C; 22 h; Inert atmosphere;

1: 1.) Me2SO4, 2.) EtONa / 1.) EtOH, RT, 2.) EtOH, reflux, 5 h 2: 6 N aq. HCl / 18 h / Heating 3: H2SO4 conc. / 3 h / Heating 4: 66 percent / parachloranile / xylene / 16 h / Heating View Scheme

1: 6 N aq. HCl / 18 h / Heating 2: H2SO4 conc. / 3 h / Heating 3: 66 percent / parachloranile / xylene / 16 h / Heating View Scheme

silica gel in ethyl acetate; pentane gel column chromatography;

1.1: silver hexafluoroantimonate; [{(η5-C5Me5)RhCl}2(μ-Cl)2]; copper diacetate / 1,2-dichloro-ethane / 16 h / 120 °C / Inert atmosphere; closed reactor 1.2: 1 h / 20 °C / Inert atmosphere 2.1: silica gel / ethyl acetate; pentane / gel column chromatography View Scheme