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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3co049

Which of the following statements about imine and enamine formation are correct?

  1. AA secondary amine and a ketone having an alpha hydrogen can give an enamine
  2. BA primary amine and an aldehyde give a product with
  3. CA tertiary amine and a ketone give an enamine
  4. DThe rate is maximum in mildly acidic solution, near pH 4 to 5

Answer: A, B, D

The first three statements are correct. A tertiary amine has no N-H and cannot lose water to give a neutral enamine or imine.
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