Question

In which of the below reactions do we find \( \alpha, \beta \)-unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?

• A. Perkin reaction
• B. Diels-Alder reaction
• C. Claisen rearrangement
• D. Hoffman reaction

Hint:

The Diels-Alder reaction is a type of cycloaddition that involves the reaction between a conjugated diene and a dienophile, forming a six-membered ring.

Answer 1

The Correct Option is B

Step 1: Identifying the reaction type.
The Diels-Alder reaction is a cycloaddition reaction between a diene and a dienophile, often involving \( \alpha, \beta \)-unsaturated carbonyl compounds.

Step 2: Conclusion.
Thus, the correct answer is option (B).

Final Answer: \[ \boxed{\text{(B) Diels-Alder reaction}} \]