1: 93 percent / NaI / acetone / 12 h / Heating 2: 80 percent / tributyltin hydride, 2,2'-azobisisobutyronitrile / benzene / 2 h / Heating 3: OsO4, NaIO4 4: KMnO4 5: 82 percent / dimethylformamide; acetic acid / 1 h / 80 °C 6: 85 percent / aq. (NH4)2Ce(NO3)6 / acetonitrile / 0.75 h / -5 °C View Scheme