Scheme-1: $C_6{H}_5{N}_{2}Cl\stackrel{CuCN}{\to }{C}_6{H}_{5}CN\stackrel{H_{2}o/H^{+}}{\to }{C}_6{H}_{5}COOH\stackrel{∆}{\to }\left[\mathrm{Product}-\mathrm{I}\right]$

Scheme -2 :$C_6{H}_{5}N{O}_2\stackrel{Fe/HCL}{\to }{C}_6{H}_{5}N{H}_2\stackrel{NO2+HCl, 273K}{\to }{C}_6{H}_5{N}_{2}Cl\stackrel{H_{2}O/H^{+}}{\to }\left[\mathrm{Product}-\mathrm{II}\right]$

scheme -3: উল্লিখিত Scheme সমূহে Product-I, Product-II এবং হলো যথাক্রমেঃ