Question

Identify the amide which gives propan-1-amine by Hoffmann bromamide reaction.

• A. \( \mathrm{CH_3CH_2CONH_2} \)
• B. \( \mathrm{CH_3CH(CH_3)CONH_2} \)
• C. \( \mathrm{CH_3CH_2CH_2CONH_2} \)
• D. \( \mathrm{CH_3CH_2CONHCH_3} \)

Hint:

Hoffmann bromamide reaction reduces primary amides to primary amines with one carbon less.

Answer 1

The Correct Option is C

- Hoffmann bromamide reaction converts a primary amide into a primary amine with one less carbon atom.
- To get propan-1-amine (3-carbon chain amine), the amide must be butanamide (\(\mathrm{CH_3CH_2CH_2CONH_2}\)) which has 4 carbons, so after loss of one carbon, the amine has 3 carbons.
- Other amides do not correspond to this product.