A simple, efficient and green procedure for Michael addition catalyzed by [C4dabco]OH ionic liquid

A dabco-based basic ionic liquid, 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane hydroxide, has been developed as a catalyst for a convenient and rapid method for the Michael addition of active methylene compounds to α,β-unsaturated carboxylic esters and nitriles. The method is very simple, and the yields are very high. The catalyst can be recycled several times without much loss of activity.

Graphical abstractA bis Michael addition of active methylene compounds to α,β-unsaturated carboxylic esters and nitriles is catalyzed by [C4dabco]OH under solvent free condition. The catalyst can be recycled.Figure optionsDownload full-size imageDownload as PowerPoint slide