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JEE Main · 2022 · 26 Jul 2022 · Shift 2 · Aldehydes Ketones and Carboxylic Acids

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Consider the above reaction and predict the major product.
  1. (A)(see structure)
    ✓ Correct
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)

Answer: (A)

Solution

The reaction involves DiBAL-H (diisobutylaluminum hydride) reduction followed by hydrolysis. DiBAL-H is a selective reducing agent that reduces esters to aldehydes and nitriles to aldehydes (via imine intermediate). In this case, the ester group () is reduced to an aldehyde (), and the nitrile group () is also reduced to an aldehyde. The product contains two aldehyde groups as shown in option (A).

JEE Main · 2022 · 26 Jul 2022 · Shift 2 · Single correct option

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