Study Notes On CLAISEN REACTION (CLAISEN SCHMIDT REACTION) (Chemical Science) - Download PDF!

By Astha Singh|Updated : July 22nd, 2022

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Short Notes On CLAISEN REACTION (CLAISEN SCHMIDT REACTION)

It is a carbon-carbon bond formation reaction Claisen condensation reaction occurs between an aldehyde or ketone having α-hydrogen with aromatic carbonyl compound without α-hydrogen.

This reaction takes place in absence of solvent Dilute alkali, such as sodium hydroxide, is used as a base.

Claisen Schmidt condensation is an example of crossed Aldol process.

In this reaction, a carbon-carbon bond is formed via enolate addition and loss of water to form an α, β-unsaturated carbonyl compound.

General Reaction-

Reaction Mechanism-

Note 1:

It involves the condensation between an aromatic aldehyde (or a ketone) with an aliphatic aldehyde or a ketone in presence of dilute alkali to form α, β-unsaturated compounds. Example-