Deep eutectic solvent mediated controlled and selective oxidation of organic sulfides and hydroxylation of arylboronic acids

Abstract

A mild and efficient protocol has been developed for the controlled oxidation of wide variety of organic sulfides to corresponding sulfoxides using deep eutectic solvent (DES) as catalyst and hydrogen peroxide as oxidant under ambient condition. In presence of benzyl alcohols along with sulfides, DES selectively oxidizes only the sulfides to corresponding sulfoxides. The DES is prepared by using zirconium oxychloride and urea (1:5 ​M ratio) which is thermally stable up to 213 ​°C. The prepared DES can also be effectively applied for hydroxylation of arylbronic acids without using any additional catalyst and solvent.