Question

In the following reaction sequence: 

The major products P and Q, respectively, are: 

• A. A
• B. B
• C. C
• D. D

Hint:

In reactions involving sec-BuLi and ZnCl\(_2\), the organozinc reagent formed is a key intermediate in many coupling reactions, such as those catalyzed by palladium.

Answer 1

The Correct Option is B

In this reaction sequence, the first step involves treating the given compound with sec-BuLi in THF, which results in the formation of an organolithium reagent. This reagent then reacts with \( \text{ZnCl}_2 \) in the second step, leading to the major product P. Finally, the compound undergoes a palladium-catalyzed reaction to form product Q. After carefully considering the nature of the reactions, we deduce that the major products formed are as follows: - Product P involves the formation of a zinc halide (\( \text{ZnCl} \)). - Product Q involves the formation of a nitrogen-containing compound, specifically an arylamine, as a result of the palladium-catalyzed reaction. Thus, the correct answer is (B) \( \text{ZnCl} \) and \( \text{N} \). Final Answer: (B) \( \text{ZnCl} \) and \( \text{N} \).