Magnetically separable nano CuFe2O4: an efficient and reusable heterogeneous catalyst for the green synthesis of thiiranes from epoxides with thiourea

Abstract

ABSTRACT The magnetically separable nano CuFe2O4 was prepared and used as an efficient heterogeneous catalyst for conversion of various epoxides to the corresponding thiiranes with thiourea in refluxing ethanol. The reactions were completed within 34−45 min to give thiiranes in 80−95% yields. The utilized nano CuFe2O4 can be reused for several times without losing its activity.