aMolar ratio=the molar ratio of thioether : xPP/yCSP. b Method C: the reaction was assisted by microwave irradiation. Method D: the reaction mixture was heated in an oil bath at appropriate temperature (Experimental). c Yield and Conv. (conversion yield) were based on GC/MS analysis. f Time = reaction time in minutes. g W=power of microwave irradiation in Watts. h Temp =oil bath temperature (Experimental).
Table 2: Yields of products obtained by the solvent-free xPP/yCSP-promoted oxidation of thioethers by microwave irradiation and conventional heating