Hydroxyisothiazoles. I. Preparation of 3- and 5-isothiazolinones by nucleophilic displacement of isothiazole sulphones

Abstract

Heating of 4-aryl-3,5-bis(alkylsulphonyl)isothiazoles with sodium hydroxide solution under reflux affords in good yield a readily separable mixture of the 3-hydroxy-5-alkylsulphonyl and 5-hydroxy-3- alkylsulphonyl compounds.