Which of the following would undergo Hoffmann reaction to give a primary amine ?

Options

A. `R-overset(O)overset("||")(C )-Cl`
B. `RCONHCH_(3)`
C. `RCONH_(2)`
D. RCOOR

Answer

C

Explanation

When a primary amide is heated with an aqueous solution of KOH and `Br_(2)`, it gives a primary amine with one carbon atom less.
`RCONH_(2)+Br_(2)+4KOH overset(Delta)rarr RNH_(2)+2KBr+K_(2)CO_(3)+2H_(2)O`
This is known as Hoffmann degradation reaction.