1: HCl 2: LiAlH4 View Scheme

1: dimethylformamide; H2O / 0.33 h / Ambient temperature 2: 78.4 percent / sodium hydroxide; HCl / methanol; H2O / 1 h / Heating 3: 92 percent / dry hydrogen bromide / tetrahydrothiophene 1,1-dioxide / 3 h / 15 °C 4: sodium hydroxide / methanol; H2O / 1 h / Heating 5: 90 percent / 85percent phosphoric acid / acetic acid / 7 h / Heating 6: 75.1 percent / polyphosphoric acid, water / 1.33 h / 90 °C View Scheme