Question

The correct sequence of reactions involved in the following conversion is: 

• A. Bromination, Reduction, Carbylamine Reaction
• B. Reduction, Bromination, Carbylamine Reaction
• C. Bromination, Reduction, Oxidation
• D. Reduction, Bromination, Oxidation

Hint:

In the carbylamine reaction, amines react with chloroform (\( CHCl_3 \)) and KOH to form isocyanides.

Answer 1

The Correct Option is A

Step 1: Understanding the Reaction Sequence - The given reaction involves conversion of a substituted benzene with nitro (-NO\(_2\)) and methyl (-CH\(_3\)) groups to a brominated product. 

Step 2: Identifying the Steps 1. Bromination: 
- The presence of a methyl (-CH\(_3\)) group directs bromine to the para position via electrophilic substitution. 2. Reduction of Nitro Group:
- The -NO\(_2\) group is reduced to an amine (-NH\(_2\)) using reducing agents like Sn/HCl. 3. Carbylamine Reaction: 
- The -NH\(_2\) group undergoes carbylamine reaction (using CHCl\(_3\) and KOH) to form an isocyanide (-NC). 

Step 3: Conclusion
- Since this follows the sequence Bromination → Reduction → Carbylamine Reaction, the correct answer is option (1).