Synthesis of new chiral schiff bases from (+)-3-carene and their use in asymmetric oxidation of sulfides catalyzed by metal complexes

Abstract

A number of new chiral Schiff bases were synthesized starting from accessible monoterpene (+)-3-carene, and the products were used as ligands in metal complex-catalyzed oxidation of sulfides to chiral sulfoxides. The optical purity and the sign of optical rotation of chiral sulfoxides were found to strongly depend on the oxidation temperature.