1: With ammonium cerium(IV) nitrate in dichloromethane T=20°C; 2 h; 2: With ammonium cerium(IV) nitrate; diisobutylaluminium hydride in dichloromethane T=-78 - 0°C;

1.1: 87 percent / potassium ferricyanide; pyridine; potassium carbonate / potassium osmate dihydrate / H2O; 2-methyl-propan-2-ol / 48 h / 20 °C 2.1: cerium(IV) ammonium nitrate / CH2Cl2 / 2 h / 20 °C 2.2: 90 percent / diisobutyl aluminium hydride; cerium(IV) ammonium nitrate / CH2Cl2 / -78 - 0 °C View Scheme