Consider the precise multi-step chemical conversion starting from Propionic acid (). It is heated heavily with to form A. 'A' reacts fiercely with excess to form B. 'B' is extensively treated with a h

Question

Consider the precise multi-step chemical conversion starting from Propionic acid ($CH_3CH_2COOH$). It is heated heavily with $SOCl_2$ to form A. 'A' reacts fiercely with excess $NH_3$ to form B. 'B' is extensively treated with a heated mixture of $Br_2$ and $KOH$ to form the final major organic product C. Identify C.

Prashant Kotian · Accepted Answer

Correct answer: B. Propionic acid plus yields propanoyl chloride (A). Reaction with undergoes nucleophilic acyl substitution yielding propanamide (B, 3 carbons). Treatment of B with triggers the classical Hofmann bromamide degradation, decisively excising the carbonyl carbon entirely to step down the chain, yielding the 2-carbon primary amine, ethanamine (C).

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