in toluene 5 h; Heating;

1: 1.) sodium methoxide / 1.) MeOH, 0.5 h, 2.) MeOH, reflux, 18 h 2: 100 percent / sulfuryl chloride / 1.) 0 deg C, 2.) reflux, 5 h 3: 97.3 percent / conc. HCl / acetic acid / 4 h / Heating 4: 83 percent / ethanol / 17 h / Heating 5: 91.7 percent / NaIO4 / methanol; H2O / 1.) 0 deg C, 0.5 h, 2.) room temperature, 19 h 6: 91 percent / toluene / 5 h / Heating View Scheme

1: 83 percent / ethanol / 17 h / Heating 2: 91.7 percent / NaIO4 / methanol; H2O / 1.) 0 deg C, 0.5 h, 2.) room temperature, 19 h 3: 91 percent / toluene / 5 h / Heating View Scheme

1: 100 percent / sulfuryl chloride / 1.) 0 deg C, 2.) reflux, 5 h 2: 97.3 percent / conc. HCl / acetic acid / 4 h / Heating 3: 83 percent / ethanol / 17 h / Heating 4: 91.7 percent / NaIO4 / methanol; H2O / 1.) 0 deg C, 0.5 h, 2.) room temperature, 19 h 5: 91 percent / toluene / 5 h / Heating View Scheme

1: 97.3 percent / conc. HCl / acetic acid / 4 h / Heating 2: 83 percent / ethanol / 17 h / Heating 3: 91.7 percent / NaIO4 / methanol; H2O / 1.) 0 deg C, 0.5 h, 2.) room temperature, 19 h 4: 91 percent / toluene / 5 h / Heating View Scheme

1: 91.7 percent / NaIO4 / methanol; H2O / 1.) 0 deg C, 0.5 h, 2.) room temperature, 19 h 2: 91 percent / toluene / 5 h / Heating View Scheme

Multistep reaction;