1: 58.7 percent / acetic acid / tetrahydrofuran / 24 h / Ambient temperature 2: 91.7 percent / HCl / dioxane / 0.5 h / Ambient temperature 3: 71.2 percent / acetic acid / tetrahydrofuran / 48 h / Ambient temperature 4: 92.3 percent / HBr / acetic acid / 0.83 h / Ambient temperature 5: 80 percent / acetic acid / tetrahydrofuran / 48 h / Ambient temperature 6: 60 percent / H2 / 5percent Pd/C / methanol; H2O / 24 h / 760 Torr View Scheme