Diazotization of aniline with \\\\(NaNO_2\\\\) / HCl at 273-278K gives benzene diazonium chloride. Balz-Schiemann reaction then replaces diazo group with \\\\(-F\\\\) by treatment with \\\\(HB_4\\\\) to obtain fluorobenzene. F atom is then replaced with nitro group by heating with \\\\(NaNO_2\\\\). Reduction with Sn/HCl converts nitrobenzene to aniline.