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Alcohols, Phenols And Ethers

Question
CBSEENCH12008330

Which reaction of phenol with CHCl3 in NaOH followed by acidification gives salicyaldehyde? Suggest a mechanism for this reaction.

Solution
In Reimer-Tiemann reaction, phenol reacts with CHCl3 in NaOH followed by acidification gives salicyaldehyde.

The mechanism for the reaction is