Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (12): 1950-1957.DOI: 10.1016/S1872-2067(11)60470-1

• Research papers • Previous Articles     Next Articles

Solvent-Free Selective Cross-Aldol Condensation of Ketones with Aromatic Aldehydes Efficiently Catalyzed by a Reusable Supported Acidic Ionic Liquid

Abolghasem DAVOODNIA*, Ghazaleh YASSAGHI   

  1. Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
  • Received:2012-08-15 Revised:2012-10-23 Online:2013-01-18 Published:2012-12-18

Abstract: A newly prepared catalyst consisting of acidic ionic liquid 1-(4-sulfonic acid)butylpyridinium hydrogen sulfate supported on silica was used to catalyze the cross-aldol condensation of ketones with aromatic aldehydes under solvent-free conditions. The highly active and selective catalyst gave good to excellent yields of the desired cross-aldol products without the occurrence of any self-condensation reactions. Reaction times were short, the procedure and work-up were simple, and no volatile or hazardous organic solvents were necessary. Moreover, the catalyst could be reused at least four times with only a slight reduction in activity.

Key words: cross-aldol condensation, solvent-free condition, supported acidic ionic liquid, ketone, aromatic aldehyde