1: 53.6 g / sodium borohydride / ethanol / 0.5 h 2: pyridine / tetrahydrofuran / 0.67 h / 0 °C 3: 71 percent / tetra-n-butylammonium acetate / 18 h / 105 °C 4: 1.) osmium tetraoxide, t-butyl hydroperoxide, tetraethylammonium acetate tetrahydrate, 2.) acetic anhydride, pyridine, 3.) 9percent methanolic hydrogen chloride View Scheme

1: 10 percent / active MnO2 / NaCN / acetic acid / 5 h 2: 1.3 percent / 60 percent aqueous HClO4 / 20 h / Heating View Scheme

1: 10 percent / active MnO2 / NaCN / acetic acid / 5 h 2: 75 percent / HClO4 / acetone; H2O / 20 h / Heating View Scheme

1: 10 percent / active MnO2 / NaCN / acetic acid / 5 h 2: 3.3 percent / 60 percent aqueous HClO4 / 20 h / Heating View Scheme

sodium tetrahydroborate in ethanol T=-40°C;