1: 3-bromo-1-iodobenzene With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; Inert atmosphere; 2: 4-fluorobenzaldehyde in tetrahydrofuran; hexane T=-78°C; 2 h; Inert atmosphere;

sodium tetrahydroborate Reduction;

triethylsilane; trifluoroacetic acid in dichloromethane T=20°C; 15 h;