1: 1-bromo-4-butoxy-3-fluorobenzene With n-butyllithium in tetrahydrofuran T=-70°C; 2 h; Inert atmosphere; 2: boric acid trimethyl ester in tetrahydrofuran T=-70 - 20°C; 16 h; 3: With water; hydrogenchloride in tetrahydrofuran

sodium hydroxide; tetrabutylammomium bromide in water T=80°C; 6 h; Inert atmosphere;