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Acid anhydride on reaction with primary amine give:

1. Amide
2. Imide
3. Secondary amine
4. Imine

Correct answer: Amide

Solution

Acid anhydrides are acylating agents, and primary amines undergo nucleophilic acyl substitution with them. This gives an amide (often plus a carboxylic acid or carboxylate byproduct), not an imide or amine.

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