1.1: triphenylphosphine; carbon tetrabromide / CH2Cl2 / 0.17 h / 0 °C 1.2: 73.7 percent / triethylamine / CH2Cl2 / 120 h / 4 °C 2.1: hydroquinine 1,4-phthalazinediyl diether; K3Fe(CN)6; K2OsO4*2H2O / K2CO3; methanesulfonamide / H2O; 2-methyl-propan-2-ol / 168 h / 4 °C 3.1: 60 mg / p-toluenesulfonic acid / CH2Cl2 / 3 h / 20 °C 4.1: 100 percent / H2; palladium(II) chloride / methanol / 0.5 h / 20 °C 5.1: 94.3 percent / hydrochloric acid / H2O; tetrahydrofuran / 20 h / 20 °C View Scheme