1.1: 82 percent / K2CO3 / acetone / 12 h / Heating 2.1: 57 percent / K2CO3 / dimethylformamide / 12 h / 40 °C 3.1: 66 percent / toluene / 3 h / Heating 4.1: tBuLi / pentane; diethyl ether / 6 h / 20 °C 4.2: 1,2-dibromotetrachloroethane / pentane; diethyl ether / 12 h / 20 °C 5.1: 1.49 percent / aq. HCl / 0.5 h 6.1: toluene / 3 h / Heating 7.1: 1.39 g / NaBH4 / methanol / 2 h / 20 °C 8.1: 96 percent / Et3N / CH2Cl2 / 3 h / 20 °C 9.1: 55 percent / tBuLi / pentane; tetrahydrofuran / 0.5 h / -100 °C 10.1: 82 percent / trifluoroacetic acid; anisole / 48 h / Heating 11.1: 78 percent / BCl3 / CH2Cl2 / 2 h / -78 °C View Scheme

1: 4-dimethylaminopyridine; diisopropylethylamine / tetrahydrofuran / 8 h 2: NaBH4 / H2O; tetrahydrofuran / 0 °C 3: diethyl ether / -78 - 20 °C View Scheme

1: 92 percent / potassium carbonate / acetone / 5 h / Heating 2: 78 percent / lithium aluminium hydride / diethyl ether / 3 h / Ambient temperature View Scheme

1: 41 percent / potassium carbonate / dimethylformamide; toluene / 3 h / Heating 2: 29 percent / diphenyl ether / 1 h / 240 °C 3: 88 percent / piperidine / ethanol / 20 h / Heating View Scheme

1: 53 percent / Zn/Hg, HCl / ethanol 2: 1.) ZnCl2, HCl; 2.) H2O / 1.) ether; 2.) ether, heating View Scheme