Synthesis of Bis (Cyclic Dithiocarbonates) Bridged by a Polyoxyethylene Chain

Abstract

The reaction of bis-oxiranes 1 with carbon disulfide in the presence of lithium bromide as catalyst at reflux in dichloromethane affords selectively the corresponding polyoxyethylene bis (five-menbered cyclic dithiocarbonates) 2 in good yields. On the basis of the reaction conditions, an oriented mechanism for the reaction is proposed.

Keywords:

• Carbon disulfide
• cyclic dithiocarbonate
• oxathiolane-2-thione
• oxirane

Acknowledgments

The authors wish to thank Dr. M. A. M. K. Sanhoury, MRSC from the Department of Chemistry, Faculty of Sciences of Tunis for technical assistance.