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Catalysis by Ionic Liquid. A Green Protocol for the Stereoselective Debromination of vicinal-Dibromides by [pmIm]BF4 under Microwave Irradiation

Brindaban C. Ranu* and Ranjan Jana

*Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India, Email:

B. C. Ranu, R. Jana, J. Org. Chem., 2005, 70, 8621-8624.

DOI: 10.1021/jo051373r


The ionic liquid 1-methyl-3-pentylimidazolium fluoroborate, [pmIm]BF4, is an efficient catalyst as well as solvent for the stereoselective debromination of various vicinal-dibromides to the corresponding (E)-alkenes in high yields under microwave irradiation. This reaction does not require any conventional reducing agent, and the ionic liquid can be recycled.

see article for more examples

Dichloroindium Hydride(Cl2InH): A Convenient Reagent for Stereoselective Reduction of vic-Dibromides to (E)-Alkenes

B. C. Ranu, A. Das, A. Hajira, Synthesis, 2003, 1012-1014.

Key Words

Alkenes, Alkynes, Ionic Liquids, Microwave Synthesis

ID: J42-Y2005-1620