sodium hydrogencarbonate in ethanol 1.5 h; Heating;

Multi-step reaction with 2 steps 1: 63.8 g / SO2 / CH2Cl2 / 0.75 h / -10 °C2: 1) O3, 2) Ph3P / 1) CH2Cl2, MeOH, -10 deg C, 40 min, 2) room temperature, 3 h  

Multi-step reaction with 6 steps 1: imidazole / Ambient temperature2: 94 percent / NaHCO3 / aq. ethanol / 1.25 h / Heating3: 54.9 g / SeO2, 4-methylmorpholine N-oxide / methanol / 5.5 h / Heating4: imidazole / CH2Cl2 / 6 h / Ambient temperature5: 63.8 g / SO2 / CH2Cl2 / 0.75 h / -10 °C6: 1) O3, 2) Ph3P / 1) CH2Cl2, MeOH, -10 deg C, 40 min, 2) room temperature, 3 h  

Multi-step reaction with 4 steps 1: 54.9 g / SeO2, 4-methylmorpholine N-oxide / methanol / 5.5 h / Heating2: imidazole / CH2Cl2 / 6 h / Ambient temperature3: 63.8 g / SO2 / CH2Cl2 / 0.75 h / -10 °C4: 1) O3, 2) Ph3P / 1) CH2Cl2, MeOH, -10 deg C, 40 min, 2) room temperature, 3 h