Reimer-Tiemann reaction.
Reimer-Tiemann reaction:
When phenol is treated with chloroform (CHCl3) in the presence of sodium hydroxide, a - CHO group is introduced at the ortho position of the benzene ring.
This reaction is known as the Reimer-Tiemann reaction. The intermediate is hydrolyzed in the presence of alkalis to produce salicyclaldehyde.
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Cyclohexylmethanol.