1.1: 96 percent / silver nitrate / ethanol; H2O / 0.5 h / Heating 2.1: potassium tert-butoxide / tetrahydrofuran / 0.08 h 2.2: 61 percent / tetrahydrofuran / 25 °C 3.1: 93 percent / tetrakis(triphenylphosphine)palladium(0); sodium carbonate / 1,2-dimethoxy-ethane; ethanol; H2O / 16 h / Heating 4.1: 98 percent / bis(tricyclohexylphosphine)(benzylidene)ruthenium dichloride / CH2Cl2 / 23 h / 35 °C View Scheme