1: 75 percent / ammonia / various solvent(s) / 4 h / 140 °C 2: 83 percent / trifluoromethanesulfonic anhydride, dimethylsulfoxide 3: 1.) m-chloroperbenzoic acid; 2.) ozon 4: 0.25 h / Ambient temperature; variation of solvents and reagents View Scheme

1: 66 percent / phosphoryl chloride, phosphorus pentachloride / 8 h / Heating 2: 75 percent / ammonia / various solvent(s) / 4 h / 140 °C 3: 83 percent / trifluoromethanesulfonic anhydride, dimethylsulfoxide 4: 1.) m-chloroperbenzoic acid; 2.) ozon 5: 0.25 h / Ambient temperature; variation of solvents and reagents View Scheme

1: 83 percent / trifluoromethanesulfonic anhydride, dimethylsulfoxide 2: 1.) m-chloroperbenzoic acid; 2.) ozon 3: 0.25 h / Ambient temperature; variation of solvents and reagents View Scheme

15 h; Ambient temperature; Yield given. Yields of byproduct given;