Hofmann bromamide degradation (primary amide → 1° amine, one fewer carbon) (Primary amide treated with Br₂/NaOH gives primary amine with loss of carbonyl carbon as)

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Primary amide treated with Br₂/NaOH gives primary amine with loss of carbonyl carbon as carbonate

What each symbol means

SymbolWhat it stands for
RCONH₂Primary amide only (1° amide N-H)

When to use this

Aqueous base; bromine; isocyanate intermediate in mechanistic teaching; carbon count drops by one at the carbonyl carbon.