1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h 2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h 3: 98 percent / tetrahydrofuran / 5 h / Ambient temperature 4: 26 percent / 6percent sodium amalgam, disodium hydrogen phosphate / methanol / 5 h 5: 95 percent / 80percent aq. acetic acid / 0.17 h / Heating View Scheme

1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h 2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h 3: 98 percent / tetrahydrofuran / Ambient temperature 4: 28 percent / 6percent sodium amalgam, disodium hydrogen phosphate / methanol / 5 h 5: 92 percent / 80percent aq. acetic acid / 0.17 h / Heating View Scheme

Multi-step reaction with 4 steps 1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h3: 97 percent / tetrahydrofuran / 1 h4: 28 percent / 6percent sodium amalgam, disodium hydrogen phosphate / methanol / 5 h  

Multi-step reaction with 4 steps 1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h3: 98 percent / tetrahydrofuran / 5 h / Ambient temperature4: 26 percent / 6percent sodium amalgam, disodium hydrogen phosphate / methanol / 5 h  

Multi-step reaction with 4 steps 1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h3: 98 percent / tetrahydrofuran / Ambient temperature4: 28 percent / 6percent sodium amalgam, disodium hydrogen phosphate / methanol / 5 h  

Multi-step reaction with 2 steps 1: 80 percent / alkaline2: 1.) sodium methoxide / 1.) MeOH, 0 deg C, 30 min; 2.) MeOH, reflux, 20 h  

With  3-chloro-benzenecarboperoxoic acid in  dichloromethane 2 h;   

Multi-step reaction with 2 steps 1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h  

Multi-step reaction with 3 steps 1: 99 percent / 85percent m-chloroperbenzoic acid / CH2Cl2 / 2 h2: 72 percent / methylsulfonyl chloride, pyridine / 1.) 0 deg C, 2.) H2O, 40 deg C, 2 h3: 98 percent / tetrahydrofuran / 5 h / Ambient temperature