Question

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduce which one of the following fuctional group?
A. `-CHCl_(2)`
B. `-CHO`
C. `-CH_(2)Cl`
D. `-COOH`

Answer 1

Correct Answer - B
On treating phenol with chloroform in presence of sodium hydroxide, a `-CHO` group is introduced at ortho position of benzene ring. This known as Reimer-Tiemann reaction.

The intermediate substituted benzal chloride is hydrolysed in presence of alkali followed by acidification to produced salicylaldehyde.