1: sodium cyanide / water / 30 - 45 °C 2: hydrogenchloride / 20 °C 3: 1H-imidazole / dichloromethane / 25 - 30 °C 4: N-bromosuccinmide / acetone / -10 - 15 °C 5: sodium hydrogencarbonate; sodium hypochlorite; Aliquatreg; 336; potassium bromide; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical / dichloromethane / -10 - 20 °C 6: potassium carbonate / dichloromethane / -10 - 10 °C View Scheme