trifluoroacetic acid in dichloromethane T=20°C; var. acidic reagent, other temperatures, other pyrrole sulfoxides and sulfones, ΔG(excit); MechanismThermodynamic data;

3-chloro-benzenecarboperoxoic acid in dichloromethane T=0°C; 1 h;

sodium hydroxide in 1,2-dichloro-ethane T=25°C; 12 h;