Indicate which of the nitrogen compounds amongst the following would undergo Hoffmann's reaction, i,e., reaction with $\mathrm{Br}_2$ and strong $\mathrm{KOH}$ to furnish the primary amine $(\mathrm{R}-$ $\mathrm{NH}_2$)?

Question

Indicate which of the nitrogen compounds amongst the following would undergo Hoffmann's reaction, i,e., reaction with $\mathrm{Br}_2$ and strong $\mathrm{KOH}$ to furnish the primary amine $(\mathrm{R}-$ $\mathrm{NH}_2$)?, $\mathrm{R}-\mathrm{CO}-\mathrm{NHCH}_3$, $\mathrm{R}-\mathrm{CO}-\mathrm{ONH}_4$, $\mathrm{R}-\mathrm{CO}-\mathrm{NH}_2$, $\mathrm{R}-\mathrm{CO}-\mathrm{NHOH}$.

MARKS App · Accepted Answer

$\mathrm{R}-\mathrm{CONH}_2 \stackrel{\mathrm{Br}_2 / \mathrm{KOH}}{\longrightarrow} \mathrm{RNH}_2$ This is known as Hoffmann's Bromamide reaction.

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