1: 1-Bromo-3-ethoxy-4-methoxybenzene With tert.-butyl lithium in tetrahydrofuran; pentane T=-78°C; 1 h; 2: tri-isopropoxy-borane in tetrahydrofuran; pentane T=-78 - 20°C; 16 h; 3: With hydrogenchloride; water in tetrahydrofuran; pentane 0.166667 h;