1: 3-bromo-4-methoxy-benzoic acid With methyllithium in tetrahydrofuran; diethyl ether T=-78°C; 0.0833333 h; 2: With tert.-butyl lithium in tetrahydrofuran; diethyl ether; pentane T=-78 - -45°C; 1 h; 3: tri-isopropoxy-borane With hydrogenchloride; water more than 3 stages;