1: hydrogenchloride / water / 24 h / 20 °C 2: sodium tetrahydroborate; trifluoroacetic acid / dichloromethane / 25 h / 0 - 20 °C 3: iodine; potassium acetate / ethanol / 3 h / 80 °C View Scheme

Multi-step reaction with 2 steps 1.1: sodium tetrahydroborate / methanol / 1.5 h / 0 - 10 °C2.1: methanol; water / 1 h / 0 - 20 °C2.2: 2 h / 0 - 20 °C  

With  sodium hydroxide in  ethanol; dichloromethane; sulfuric acid; water Show Experimental Procedure  

With  hydrogenchloride in  water T=20°C; 24 h;