sodium hydroxide; jones reagent 1.) acetone, 0 deg C, 15 min, 2.) methanol, RT, 1 h; Yield given. Multistep reaction;

Multi-step reaction with 5 steps 1: 82 percent / chromium trioxide, conc. sulfuric acid / acetone / 1 h / 0 °C2: 1.) (S)-Alpine Borane, 2.) sodium hydroxide, 30 percent hydrogen peroxide / 1.) THF, 23 deg C, 16 h, 2.) THF, 40 deg C, 3 h3: 90 percent / pyridine / pyridine / 48 h / 23 °C4: 96 percent / hydrogen / 5percent Pd/BaSO4 / pyridine / 6 h / 23 °C5: 40 percent / ozone / CH2Cl2 / 3 h / -78 °C