Question

Predict 'A' and 'B' for the given conversion.

• A. $A-NaCN$
  $B-LiAl{H}_4$
• B. $A-HCN$
  $B-H^{+}/H_{2}O$
• C. $A-NaCN$
  $B-H_2/Ni$
• D. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

In first step, the $Cl$ group attached to alkyl ring is displace by $CN$ molecule. Thus, it is nucleophilic substitution reaction. This conversion can be done by both $HCN$ and $NaCN$.

In second step, the $CN$ group is reduced to primary amines.
$H_2/Ni$ and $LiAl{H}_4$ are reducing agents, they will reduce nitrile to respective primary amines.

Acid hydrolysis of nitrile will give carboxylic acid.

Hence, both (a) and (c) reagents can be used for the given reaction conversion.