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Claisen Condensation

On treating e...

Question

On treating ethanal with dil.NAOH,What is the product?

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Solution

Acetaldehyde undergoes aldol condensation in presence of dil NaOH or K₂CO₃ to form beta hydroxy butyraldehyde or aldol.

CH₃CHO + HCH₂CHO—–> CH₃CH(OH)CH₂CHO [Aldol]

On heating aldol loses a water molecule to give unsaturated aldehyde .

CH₃CH(OH)CH₂CHO ——-> CH₃CH=CHCHO [crotonaldehyde] +H₂O

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Claisen Condensation

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