1: 1.) Br2, 2.) H2O / 1.) CCl4, reflux, 15 min, irradiation, 2.) dioxan, reflux, 4.5 h 2: 210 mg / pyridinium chlorochromate / CH2Cl2 / 3 h 3: 67 mg / LiI / hexamethylphosphoric acid triamide / 40 h / Heating View Scheme