1: With oxygen; 5,15,10,20-tetraphenylporphyrin in tetrachloromethane; chloroform T=-30°C; Irradiation; 2: With dimethylsulfide in tetrachloromethane; chloroform 24 h;

1.1: 100 percent / p-TsOH*H2O / CH2Cl2 / 12 h / 20 °C 2.1: 100 percent / MCPBA / CH2Cl2 / 10 h / 20 °C 3.1: NaH / tetrahydrofuran; various solvent(s) / 1.5 h / Heating 3.2: 94 percent / tetrahydrofuran; various solvent(s) / 5 h / 20 °C 4.1: aq. H2O2 / ethanol / 0.5 h / 20 °C 5.1: 0.144 g / NaHCO3 / ethanol; H2O / 12 h / Heating View Scheme

1.1: 100 percent / MCPBA / CH2Cl2 / 10 h / 20 °C 2.1: NaH / tetrahydrofuran; various solvent(s) / 1.5 h / Heating 2.2: 94 percent / tetrahydrofuran; various solvent(s) / 5 h / 20 °C 3.1: aq. H2O2 / ethanol / 0.5 h / 20 °C 4.1: 0.144 g / NaHCO3 / ethanol; H2O / 12 h / Heating View Scheme

1.1: NaH / tetrahydrofuran; various solvent(s) / 1.5 h / Heating 1.2: 94 percent / tetrahydrofuran; various solvent(s) / 5 h / 20 °C 2.1: aq. H2O2 / ethanol / 0.5 h / 20 °C 3.1: 0.144 g / NaHCO3 / ethanol; H2O / 12 h / Heating View Scheme

1.1: p-toluenesulfonic acid / toluene / 8 h / 110 °C 2.1: tetraphenylporphin; oxygen / CHCl3; CCl4 / -30 °C / Irradiation 2.2: dimethylsulfide / CHCl3; CCl4 / 24 h View Scheme