1: 96 percent / Ti(O-iPr)4, t-butyl hydroperoxide, (-)-diethyl (2S,3S)-tartrate / CH2Cl2 / 48 h / -20 °C 2: 77 percent / dimethylsulfoxide; H2O / 3 h / 55 °C 3: Et3N / toluene / 0.5 h / 0 °C 4: 15percent aq. KOH / toluene / 2 h / 0 °C 5: 72 percent / NaOH / dimethylsulfoxide / 3 h / 80 °C 6: 98 percent / Na2WO4*2H2O, aq. H2O2, aq. HCl / toluene / 1 h / 60 °C 7: 42 percent / 0.5 M aq. NaOH / 14 h / 45 °C View Scheme