Question

Consider the above reaction and identify the product B.

• A.
• B.
• C.
• D.

Hint:

In organic synthesis, the reduction of nitro compounds to amines followed by acetylation is a useful method to modify functional groups. Acetanilide is often used as an intermediate for pharmaceuticals, and understanding the reaction mechanism helps in controlling the functionalization of the amine group.

Answer 1

The Correct Option is A

Let's understand the reaction step by step and identify the product B from the given choices.

The given reaction sequence involves two steps:

1. In the first step, the nitrobenzene undergoes catalytic hydrogenation using H_2/Pd in the presence of ethanol (C_2H_5OH). This step reduces the nitro group (NO_2) to an amino group (NH_2), giving aniline (compound [A]).
2. In the second step, aniline is treated with acetic anhydride ((CH_3CO)_2O) in the presence of pyridine. This results in the acetylation of the amino group, forming acetanilide (compound [B]).

The entire reaction can be summarized as follows:

After going through the steps in detail, we can identify compound B as acetanilide.

The correct answer corresponds to the option showing acetanilide as the final product (compound B).