1: 1-bromo-3-chlorobenzene With diisobutyl-aluminum chloride; diisobutylaluminium hydride; magnesium; lithium chloride in tetrahydrofuran; n-heptane T=25°C; 2: 4-bromo-benzoyl chloride With CuCN*2LiCl in tetrahydrofuran; n-heptane T=-10 - 25°C; 3 h;