In which of the following reaction aromatic aldehyde is treated with acid anhydride in presence of corresponding salt of the acid to give unsaturated aromatic acid.

Friedel-Craft's reaction

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Perkin reaction

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Wurtz reaction

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None of these

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Solution

The correct option is B Perkin reaction
Aromatic aldehyde on reacting with carboxylic acid anhydride in presence of salt of carboxylic acid to form $α, β$ -unsaturated acids. This reaction is called Perkin reaction.

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