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 / 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

acetic acid in water T=25°C; 2 h;