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Question 910007
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Practical Organic Chemistry: JEE Advanced MCQ

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JEE AdvancedHardQuestion 910007

Question

The Gabriel phthalimide synthesis gives exclusively:
  1. A
    Primary amines (no 2° or 3° contamination)
    Correct
  2. B
    All three types of amines
  3. C
    Only 3° amines
  4. D
    Aromatic amines only

Correct answer

Primary amines (no 2° or 3° contamination)

Explanation

Gabriel synthesis: phthalimide K salt + RX → N-alkylphthalimide (SN2) → hydrolysis (acid/base or hydrazine) → RNH₂ (1° amine) + phthalic acid. Because only one N−H is available for substitution, it gives exclusively primary amines.

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