1: 4-bromo-1,3-bis-(trifluoromethyl)-benzene With isopropylmagnesium chloride in tetrahydrofuran T=-10°C; 2: boric acid trimethyl ester in tetrahydrofuran T=-10°C; 3: With hydrogenchloride in tetrahydrofuran; water T=25°C; 1.5 - 2.5 h;