Which of the following reagents is used in Mendius reduction reaction of alkyl cyanide?

1. $\mathrm{Sn} / \mathrm{HCl}$
2. LiAlH $_{4} /$ Ether
3. $\mathrm{Na}-\mathrm{Hg} / \mathrm{H}_{2} \mathrm{O}$
4. $\mathrm{Na} / \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$

Solution

Mendius reaction - Nitriles on reduction with $\mathrm{Na}$ in ethanol gives primary amines.

Asked in: MHT CET 2020 (20 Oct Shift 1)

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