1: 1,4-dibromo-2-methoxybenzene With n-butyllithium in diethyl ether; hexane T=-80°C; 0.5 h; Inert atmosphere; 2: With tri-isopropoxy-borane in tetrahydrofuran; diethyl ether; hexane T=-70°C; 0.5 h; Inert atmosphere; 3: N,N-dimethyl-formamide Further stages;

1: With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: With boric acid trimethyl ester in tetrahydrofuran; hexane T=-78 - 20°C; 2 h; 3: With hydrogenchloride; water in tetrahydrofuran; hexane T=20°C; 0.5 h;

sodium chlorite in water T=20°C; 0.75 h;