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Ionic Liquid as Catalyst and Reaction Medium - A Simple, Efficient and Green Procedure for Knoevenagel Condensation of Aliphatic and Aromatic Carbonyl Compounds Using a Task-Specific Basic Ionic Liquid

Brindaban C. Ranu *, Ranjan Jana

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

B. C. Ranu, R. Jana, Eur. J. Org. Chem., 2006, 3767-3770.

DOI: 10.1002/ejoc.200600335


The basic ionic liquid 1-butyl-3-methylimidazolium hydroxide, [bmIm]OH, efficiently catalyzes the Knoevenagel condensation of various aliphatic and aromatic aldehydes and ketones with active methylenes at room temperature without requirement of any organic solvent.

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Key Words

Ionic liquids, Green Chemistry, Catalysis, Knoevenagel Condensation, Carbonyl Compounds, Coumarins

ID: J24-Y2006-2550