1: 83 percent / mercuric oxide, HClO4 / 1,2-dimethoxy-ethane / Heating 2: TsOH, nitrooxide / CH2Cl2 / 1 h / 0 °C 3: 90 percent / piperidine, pyridine / 0.17 h / 100 °C 4: 100 percent / H2 / PtO2 / methanol / 3 h 5: 86 percent / polyphosphonic acid / 0.17 h / 80 - 90 °C 6: 96 percent / H2, sodium acetate / 5percent Pd/C / acetic acid / 2 h View Scheme