N. G. Khaligh
May 15, 2014
Citations
0
Influential Citations
18
Citations
Journal
Chinese Journal of Catalysis
Abstract
Abstract 1,1′-Butylenebispyridinium hydrogen sulfate is an efficient, halogen-free and reusable Bronsted ionic liquid catalyst for the synthesis of ethyl-4-aryl/heteryl-hexahydro-trimehtyl-5-oxoquinoline-3-carboxylates by the one-pot condensation of dimedone, aryl/heteryl aldehydes, ethyl acetoacetate, and ammonium acetate under solvent-free conditions. This method has the advantages of high yield, clean reaction, simple methodology, and short reaction time. The ionic liquid can be recycled five times without significant loss of the catalytic activity.