1: With n-butyllithium in tetrahydrofuran T=-78°C; 0.333333 h; 2: With tri-isopropoxy-borane in tetrahydrofuran T=-78°C; 1 h; 3: With hydrogenchloride in tetrahydrofuran T=-78 - 20°C; Further stages.;

hydrogenchloride; n-butyllithium in tetrahydrofuran reacting aryl bromide with n-butyllithium in THF at -78°C, addn. of boron compd., reaction with aq. HCl;

dihydrogen peroxide; acetic acid in tetrahydrofuran; water T=0 - 20°C;