1: 80 percent / Jones reagent 2: 86 percent / 60percent HClO4 / tetrahydrofuran / 0.83 h / 50 °C 3: 17 percent / N-bromosuccinimide / aq. acetic acid / 1 h / 25 °C 4: 1.) H2, 2.) potassium carbonate / 1.) 5percent Pd-C / 1.) acetone 5: 80 percent / copper(II) nitrate / acetic anhydride / -20 °C View Scheme