Question

Phenol with ${\mathrm{CCl}}_4$ and $\mathrm{KOH}$ gives salicylic acid. This reaction is known as

• A. Siemlet reaction
• B. Rosenmund’s reaction.
• C. Friedel-Craft reaction.
• D. Reimer – Tiemann reaction.

Answer 1

The correct option is D

Reimer – Tiemann reaction.

Explanation for the correct option:

Option (D): Reimer – Tiemann reaction.

• Reimer - Tiemann reaction is used to convert Phenol to ortho-hydroxy benzaldehyde by using Carbon tetrachloride.
• It is an organic Chemical reaction because of the presence of ${\mathrm{CCl}}_4$ and base $\mathrm{KOH}$. the carboxylic group is introduced at the ortho position of the phenolic group.
• The product formed is Salicyclic acid
• 

The explanation for the incorrect answer:

Option(A): Siemlet reaction

In this reaction, benzyl halide is converted to aldehyde.

Option(B): Rosenmund’s reaction.

in this reaction, acyl Chloride is converted to aldehyde

Option(C): Friedel-Craft reaction.

This is an electrophilic substitution reaction on the aromatic ring.

So, Option (D) is correct. Phenol with ${\mathrm{CCl}}_4$ and $\mathrm{KOH}$ gives salicylic acid. This reaction is known as Reimer – Tiemann reaction.