In the first part of this study, an efficient synthesis of thioethers via the one-pot reaction of benzylic or allylic halides, Na2S2O3· 5H2O and benzylic alcohols in the poly ethylene glycol has been introduced. Also, this procedure was successfully extended to the preparation of thioethers from primary and secondary halides using molecular iodine as catalyst. In the last study, a novel and efficient protocol for one-pot synthesis of thia-Michael adducts of thiophenols from the reaction of an aryl halide, an electron-deficient alkene and sodium iso-propyl zanthate in the presence of CuI was developed. Furthermore, this protocol was successfully extended to one-pot synthesis of aryl-alkyl thioethers by replacing electron-deficient alkenes with primary or secondary halides.