Knoevenagel Condensation Mechanism in Aldol Reactions

The Knoevenagel condensation is an aldol-type reaction that joins aldehydes or ketones with active methylene compounds such as beta-diesters. It forms substituted olefins, which are compounds with a carbon-carbon double bond. In this reaction, an amine base acts as the catalyst.

The amine base re...

The Knoevenagel reaction involves the condensation of aldehydes or ketones with active methylene compounds to produce substituted olefins.

Activated methylenes such as β-diesters comprise α hydrogens flanked by electron-withdrawing substituents, which makes these hydrogens highly acidic.

The Knoevenagel condensation is catalyzed by...