TBAI–HBr system mediated generation of various thioethers with benzenesulfonyl chlorides in PEG400

An efficient procedure for the formation of C–S bonds via C–H functionalization was developed for the synthesis of aryl sulfides in good to excellent yields using TBAI–HBr system promoted direct sulfenylation of various compounds, such as phenols, pyrazolones, indoles and related heteroarenes. Low cost and widely available arylsulfonyl chlorides were used as the sulfur source to provide various sulfur-containing compounds. The characteristic of the present protocol is convenient, green, highly efficient with a wide-application and short reaction time.