Aldol condensations of a variety of different aldehydes and ketones under ultrasonic irradiation using poly(N-vinylimidazole) as a new heterogeneous base catalyst under solvent-free conditions in a liquid-solid system

An ultrasound-assisted aldol condensation reaction has been developed for a range of ketones with a variety of aromatic aldehydes using poly(N-vinylimidazole) as a solid base catalyst in a liquid-solid system. The catalyst can be recovered by simple filtration and reused at least 10 times without any significant reduction in its activity. The reaction is also amenable to the large scale, making the procedure potentially useful for industrial applications.

Graphical AbstractThe aldol condensation reaction of a variety of different ketones with a range of aromatic aldehydes can be efficiently catalyzed in the presence of poly(N-vinylimidazole) (PVIm) in a liquid-solid system under ultrasonic irradiation conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide