Question

The sequence of three steps involved in the following conversion is 

• A. (i) Friedel-Crafts alkylation; (ii) Reduction; (iii) Friedel-Crafts acylation
• B. (i) Friedel-Crafts acylation; (ii) Friedel-Crafts alkylation; (iii) Reduction
• C. (i) Friedel-Crafts acylation; (ii) Reduction; (iii) Friedel-Crafts alkylation
• D. (i) Friedel-Crafts alkylation; (ii) Friedel-Crafts acylation; (iii) Reduction

Hint:

In Friedel-Crafts reactions, acylation is typically done first to introduce the carbonyl group, followed by reduction, and then alkylation to form the desired alkylated product.

Answer 1

The Correct Option is B

Step 1: Understanding the reaction sequence. 
In this reaction, the first step involves a Friedel-Crafts acylation to form the acylated product. The second step is Friedel-Crafts alkylation, and the final step is reduction, which reduces the carbonyl group to form the desired product. 
 

Step 2: Analyzing the options. 
(A) (i) Friedel-Crafts alkylation; (ii) Reduction; (iii) Friedel-Crafts acylation: Incorrect — This sequence is not correct as it involves the wrong order of reactions. 
(B) (i) Friedel-Crafts acylation; (ii) Friedel-Crafts alkylation; (iii) Reduction: Correct — This is the correct order for the reactions. 
(C) (i) Friedel-Crafts acylation; (ii) Reduction; (iii) Friedel-Crafts alkylation: Incorrect — This sequence is not correct and does not represent the proper order of reactions. 
(D) (i) Friedel-Crafts alkylation; (ii) Friedel-Crafts acylation; (iii) Reduction: Incorrect — This sequence is not correct and does not represent the proper order of reactions. 
 

Step 3: Conclusion. 
The correct answer is (B) as it correctly represents the sequence of reactions.