Regioselective Iodination of Arenes Using Iodine/NaBO₃ · 4H₂O System in Ionic Liquid

Abstract

A mild, efficient, and simple protocol was developed for iodination of arenes and heterocyclic compounds with molecular iodine catalyzed by sodium perborate in ionic liquid. The methodology offered iodoarenes in good to excellent yields at room temperature. The protocol proved to be highly selective, as a single isomer was formed exclusively in most of the substrates.

Keywords:

• Catalysis
• iodination
• ionic liquid
• sodium perborate

ACKNOWLEDGMENTS

S. V. B., A. R. D., and N. B. D. are thankful to the Council of Scientific and Industrial Research New Delhi for the award of senior research fellowships and financial support.

Notes

^a The product were characterized by ¹H NMR, IR, MS, and comparison with authentic samples.

^b Isolated yields.

^c The ortho-para ratio was determined by GC-MS.