Perkin reaction

(The reaction used to make the latter became known as the Perkin reaction.)

In a Perkin reaction the aldehyde is aromatic and the enolate generated from an anhydride.

Coumarin can be prepared in a laboratory in a Perkin reaction between salicylaldehyde and acetic anhydride.

Unsaturated carbonyls can be prepared in the laboratory in an aldol reaction and in the Perkin reaction.

The Perkin reaction is an organic reaction developed by William Henry Perkin that is used to make cinnamic acids.