Synthesis of thioureas in ionic liquid medium

Abstract

A highly efficient procedure for the synthesis of symmetrical thioureas by means of simple condensation of primary amines and carbon disulfide in 1-butyl-3-methylimidazolium chloride [BMIM][Cl] as a cheap and commercially available ionic liquid is presented. This procedure works for aromatic and aliphatic primary amines and give high to excellent yields of symmetrical thioureas without need for any catalyst or tedious work-up.

Keywords:

• ionic liquid
• thiourea
• carbon disulfide
• amine
• symmetrical

Acknowledgement

We are grateful to the Research Council of Faculty of Chemistry of Tarbiat Moallem University for supporting this work.