JEE Main 2022 — Amines Question with Solution

Benzen sulphonyl chloride

(B) Hoffmann bromamide reaction $\to$known reaction of isocynates

$\mathrm{R}-\mathrm{CO}-{\mathrm{NH}}_2+{\mathrm{X}}_2+4\mathrm{NaOH}\to \mathrm{R}-{\mathrm{NH}}_2+2\mathrm{NaX}+{\mathrm{Na}}_2{\mathrm{CO}}_3+2{\mathrm{H}}_2\mathrm{O}$

Intermediate : $\mathrm{R}-\mathrm{N}=\mathrm{C}=\mathrm{O}$ (isocyanate)

(C) Carbylamine reaction $\to$ Test for primary amine
$\mathrm{R}-{\mathrm{NH}}_2$ or $\mathrm{Ar}-{\mathrm{NH}}_2+{\mathrm{CHCl}}_3+3\mathrm{KOH}\to \mathrm{RNC}$

(D) Hoffmann orientation $\to$ Anti saytzeff (Formation of less substituted alkene as major product)