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  4. Phenol can be converted to o-hydroxybenzaldehyde by

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Q. Phenol can be converted to o-hydroxybenzaldehyde by

KEAMKEAM 2011Alcohols Phenols and Ethers

Solution:

Treatment of phenol with chloroform in presence of aqueous
$ NaOH $ or $ KOH $ at $ 70{}^\circ C $
followed by hydrolysis gives o-hydroxybenzaldehyde (salicylaldehyde) as the major product. This reaction is called Reimer-Tiemann reaction.

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