Question

The final product A formed in the following multistep reaction sequence is

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is A

The given multi-step reaction sequence involves the transformation of the starting compound into the final product A through a series of chemical reactions. Here's a detailed step-by-step explanation of the process:

Oxidation Step: The first step involves the hydration of the alkene with \(H_2O\) in the presence of an acid catalyst. This typically converts the alkene into an alcohol. 

Next, the alcohol undergoes oxidation using \(CrO_3\) (a chromium-based oxidizing agent). This step oxidizes the alcohol to a corresponding ketone.

Wolff-Kishner Reduction: In the second step, the ketone is treated with hydrazine (\(N_2H_4\)) and potassium hydroxide (\(KOH\)) under heating conditions. This is known as the Wolff-Kishner reduction, which effectively reduces the ketone to a hydrocarbon, eliminating the carbonyl group entirely.

Combining these transformations, the final product A is obtained, which is an alkane formed from the initial cyclohexene derivative after hydration, oxidation, and subsequent reduction.

After following these steps, the correct product corresponds to option A.

Answer 2

The reaction sequence involves the following steps:

1. The initial compound undergoes hydration with H₂O, H⁺, forming a primary alcohol.
2. Oxidation with CrO₃ converts the alcohol to a ketone.
3. Finally, treatment with NH₂NH₂, KOH and heating (Wolff-Kishner reduction) reduces the ketone to an alkane.

Thus, the final product A is a simple alkyl chain attached to the benzene ring: Answer: (1).
So, the correct answer is : Option (1).