Question

How will you convert ethanamine into methanamine?

Answer 1

$$\underset{\mathrm{Ethanamine}}{\mathrm{CH}{\phantom{A}}_3\mathrm{CH}{\phantom{A}}_2\mathrm{NH}{\phantom{A}}_2}\stackrel{\mathrm{HCl}+\mathrm{NaNO}{\phantom{A}}_2}{\to }\underset{\mathrm{Ethanol}}{\mathrm{CH}{\phantom{A}}_3\mathrm{CH}{\phantom{A}}_2\mathrm{OH}}\stackrel{\mathrm{K}{\phantom{A}}_2\mathrm{Cr}{\phantom{A}}_2\mathrm{O}{\phantom{A}}_7/\mathrm{H}{\phantom{A}}_2\mathrm{SO}{\phantom{A}}_4}{\to }\underset{\mathrm{Ethanoic}\mathrm{acid}}{\mathrm{CH}{\phantom{A}}_3\mathrm{COOH}}\stackrel{\mathrm{NH}{\phantom{A}}_3}{\to }\mathrm{CH}{\phantom{A}}_3\mathrm{COONH}{\phantom{A}}_4\underset{-\mathrm{H}{\phantom{A}}_2\mathrm{O}}{\overset{\mathrm{\Delta }}{\to }}\underset{\mathrm{Ethanamide}}{\mathrm{CH}{\phantom{A}}_3\mathrm{CONH}{\phantom{A}}_2}\stackrel{\mathrm{Br}{\phantom{A}}_2/\mathrm{KOH}}{\to }\underset{\mathrm{Methanamine}}{\mathrm{CH}{\phantom{A}}_3\mathrm{NH}{\phantom{A}}_2}$$