Question

$C{H}_{3}C{H}_{2}CON{H}_2\stackrel{P_2{O}_5}{\to }A\underset{1)C{H}_{3}MgBr}{\overset{2)H^{+}/H_{2}O}{\to }}B$

Identify $A$ and $B$ in the above reaction.

Answer 1

Amides on reaction with $P_2{O}_5$ gives Nitriles and $P_2{O}_5$ is strong reducing agent. Nitriles on reaction with grignard reagent gives Ketones.