Question

Consider the above reactions, the product A and product B, respectively are

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is D

The question provides two chemical reactions, and we need to identify products A and B.

**Reaction 1: Formation of Product A**

The first reaction involves converting the amide to a product using KOBr (Potassium hypobromite). This is a classic example of the Hofmann rearrangement, where an amide is converted into an amine with the loss of one carbon atom.

The intermediate is an isocyanate, which hydrolyzes to give a primary amine.

Therefore, product A is a primary amine corresponding to the aromatic group.

**Reaction 2: Formation of Product B**

In the second reaction, LiAlH_4 followed by hydrolysis is used. Lithium aluminium hydride is a strong reducing agent that reduces amides to amines.

This reaction preserves the number of carbon atoms, converting the amide carbonyl group to a methylene group.

Therefore, product B is the respective amine without carbon atom loss.

**Conclusion:**

The products are determined as follows:

• Product A: Primary amine from Hofmann rearrangement.
• Product B: Amine from LiAlH_4 reduction.

The correct answer, considering the reactions provided, is: