THIOL-ESTER-THIONO-ESTER REARRANGEMENTS INDUCED BY ALKYLATING REAGENTS, PERACIDS, OR<i>N</i>-HALOSUCCINIMIDE IN THE 3-ACYLTHIO-4-ARYL-3-ISOTHIAZOLINE-5-THIONE SYSTEM
Alkylations of 3-acylthio-4-aryl-3-isothiazoline-5-thiones with diazomethane, triethyloxonium tetrafluoroborate, or alkyl iodide afford 5-alkylthio-4-aryl-3-thioacyloxyisothiazoles, whereas the reactions of these isothiazolines with peracids or N-halosuccinimide produce bis(4-aryl-3-thioacyloxyisothiazol-5-yl) disulfides.