1: 66 percent / sodium acetate, N-bromosuccinimide / tetrahydrofuran; H2O / 0.5 h / 0 °C 2: 60 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 5 h / Ambient temperature 3: 90 percent / CeCl3*7H2O, NaBH4 / methanol / 0.17 h / 0 °C 4: 87 percent / diethyl azodicarboxylate, triphenylphosphine / tetrahydrofuran / 5 h / Ambient temperature 5: 100 percent / potassium carbonate / methanol / 2 h / Ambient temperature 6: 100 percent / 4-dimethylaminopyridine, pyridine / CH2Cl2 / 1 h / 0 °C 7: 96 percent / acetic acid, water / tetrahydrofuran / 24 h / Ambient temperature 8: 91 percent / PCC, sodium acetate, Celite / CH2Cl2 / 1 h / Ambient temperature View Scheme