Amines Ques 33
33. Indicate which nitrogen compound amongst the following would undergo Hoffmann reaction (i.e., reaction with $Br_2$ and strong $KOH$ ) to furnish the primary amine $(R-NH_2)$ [1989]
(a) $RCONHCH_3$
(b) $RCOONH_4$
(c) $RCONH_2$
(d) $R-CO-NHOH$.
Topic 3: Nitrocompounds, Alkyl Nitrites and Diazonium Salts
Show Answer
Solution:
- (c) Only $1^{\circ}$ amides (i.e. $RCONH_2$ ) in the present case undergo Hofmann bromamide reaction.
$RCONH_2+Br_2+4 KOH \longrightarrow$
$ R-NH_2+2 KBr+K_2 CO_3+2 H_2 O $
(Hofmann’s bromamide reaction)
BETA
