1.1: sodium tetrahydroborate / methanol / 1.5 h / 0 - 10 °C 2.1: methanol; water / 1 h / 0 - 20 °C 2.2: 2 h / 0 - 20 °C 3.1: hydrogenchloride / water / 24 h / 20 °C 4.1: sodium tetrahydroborate; trifluoroacetic acid / dichloromethane / 25 h / 0 - 20 °C 5.1: iodine; potassium acetate / ethanol / 3 h / 80 °C View Scheme

1.1: sodium tetrahydroborate / methanol / 1.5 h / 0 - 10 °C 2.1: methanol; water / 1 h / 0 - 20 °C 2.2: 2 h / 0 - 20 °C 3.1: hydrogenchloride / water / 24 h / 20 °C 4.1: sodium tetrahydroborate; trifluoroacetic acid / dichloromethane / 25 h / 0 - 20 °C View Scheme

With  sodium tetrahydroborate in  methanol  

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