1: ortho-fluorobromobenzene With 2,2,6,6-tetramethyl-piperidine; n-butyllithium in tetrahydrofuran T=-78°C; 3 h; 2: tri-isopropoxy-borane in tetrahydrofuran T=-78 - -40°C; 3: With hydrogenchloride in tetrahydrofuran; water T=20°C;