1: 69 percent / K2CO3 / acetonitrile / 24 h / Ambient temperature 2: 2.) K2CO3 / 1.) reflux, 2 h, 2.) DMF, RT, 16 h 3: 81 percent / K2CO3 / dimethylformamide / 8 h / Ambient temperature 4: KOH / ethanol; H2O / 0.67 h / Heating 5: copper bronze, quinoline / 185 °C 6: 1.) C-200 (BaCO3*0.8H2O), 2.) H2O / 1.) THF, 2.) THF, reflux, 1 h 7: KOH / ethanol; H2O / 0.67 h / Heating 8: 34 percent / polyphosphoric acid silyl ester (PPSE) / 22 h / 120 °C View Scheme

1: 72 percent / K2CO3 / dimethylformamide / 24 h / Ambient temperature 2: 81 percent / K2CO3 / dimethylformamide / 24 h / 20 °C 3: KOH / ethanol; H2O / 0.67 h / Heating 4: copper bronze, quinoline / 185 °C 5: 1.) C-200 (BaCO3*0.8H2O), 2.) H2O / 1.) THF, 2.) THF, reflux, 1 h 6: KOH / ethanol; H2O / 0.67 h / Heating 7: 42 percent / polyphosphoric acid silyl ester (PPSE) / 24 h / 100 °C View Scheme

1: 86 percent / K2CO3 / dimethylformamide / 24 h / 20 °C 2: KOH / ethanol; H2O / 0.67 h / Heating 3: copper bronze, quinoline / 185 °C 4: K2CO3 / acetonitrile / 24 h / Ambient temperature 5: 1.) C-200 (BaCO3*0.8H2O), 2.) H2O / 1.) THF, 2.) THF, reflux, 1 h 6: KOH / ethanol; H2O / 0.67 h / Heating 7: 44 percent / polyphosphoric acid silyl ester (PPSE) / 5 h / 120 °C View Scheme

1.1: potassium tert-butoxide / tetrahydrofuran / 0.08 h 1.2: 61 percent / tetrahydrofuran / 25 °C 2.1: 93 percent / tetrakis(triphenylphosphine)palladium(0); sodium carbonate / 1,2-dimethoxy-ethane; ethanol; H2O / 16 h / Heating 3.1: 98 percent / bis(tricyclohexylphosphine)(benzylidene)ruthenium dichloride / CH2Cl2 / 23 h / 35 °C View Scheme