Salicylaldehyde is obtained when phenol is heated with `CHCl_(3)` and aqueous NaOH. This reaction is known by which name?

Options

A. Carbylamine reaction
B. Hofmann's reaction
C. Reimer-Tiemann reaction
D. Kolbe-Schmidt reaction

Explanation

To determine the name of the reaction in which salicylaldehyde is obtained when phenol is heated with chloroform (CHCl₃) and aqueous sodium hydroxide (NaOH), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are phenol, chloroform (CHCl₃), and aqueous sodium hydroxide (NaOH).

2. **Understand the Reaction Conditions**:
- The reaction involves heating phenol with CHCl₃ in the presence of NaOH. This indicates that a chemical transformation is occurring under basic conditions.

3. **Recognize the Product**:
- The product of this reaction is salicylaldehyde, which is an aromatic aldehyde.

4. **Recall the Mechanism**:
- In this reaction, phenol reacts with chloroform in the presence of a strong base (NaOH) to form a dichlorocarbenium ion, which acts as an electrophile. This electrophile then attacks the phenol to produce salicylaldehyde.

5. **Name the Reaction**:
- This specific reaction is known as the **Riemert reaction**. More specifically, it is referred to as **Riemert formylation** when it involves the formation of an aldehyde like salicylaldehyde.

### Final Answer:
The reaction is known as the **Riemert reaction** or **Riemert formylation**.