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Chemistry · PYQ NEET UG 2021

हिन्दी

The product formed in the following chemical reaction is: (See structure on image page 1)

  1. Cyclohexyl derivative with \( \text{CH}_2-\text{CH}_2-\text{OH} \)
  2. Cyclohexyl derivative with \( \text{CH(OH)}-\text{CH}_3 \) and alcohol
  3. Cyclohexyl derivative with \( \text{CH}_2-\text{C}(=\text{O})-\text{OCH}_3 \)
  4. Cyclohexyl derivative with \( \text{CH}_2-\text{C(OH)}(H)-\text{OCH}_3 \)

Correct answer · Option 3

Cyclohexyl derivative with \( \text{CH}_2-\text{C}(=\text{O})-\text{OCH}_3 \)

Explanation

NaBH4 selectively reduces the ketone group while ester group remains unaffected. Thus, the ketone in the ring gets reduced to a secondary alcohol (-OH) leaving the ester \( -\text{COOCH}_3 \) intact.
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