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Explain 

1. Perkin’s reaction 

2. Knocvenagal reaction.

1 Answer

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1. Perkin’s reaction 

When an aromatic aldehyde is heated with an aliphatic acid anhydride in the presence of the sodium salt of the acid corresponding to the anhydride, condensation takes place and an α, β unsaturated acid is obtained. This reaction is known as Perkin’s reaction.

2. Knoevenagal reaction

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