Aniline to bromobenzene

Equations: $\mathrm{C_{6}H_{5}NH_{2}} + \mathrm{NaNO_{2}} + 2\mathrm{HCl} \xrightarrow{\text{273-278}\text{ }\text{K}} \mathrm{C_{6}H_{5}N_{2}Cl} + \mathrm{NaCl} + 2\mathrm{H_{2}O}$ $\mathrm{C_{6}H_{5}N_{2}Cl} + \mathrm{CuBr} \xrightarrow{\text{CuBr}\text{,}\text{ }\text{HBr}} \mathrm{C_{6}H_{5}Br} + \mathrm{N_{2}} + \mathrm{CuCl}$