1: 5-bromo-2-fluoro-benzaldehyde With n-butyllithium in tetrahydrofuran; hexanes T=-40°C; 0.416667 h; 2: N,O-dimethylacetohydroxamic acid in tetrahydrofuran; hexanes T=-40 - 20°C; 1 h; 3: With hydrogenchloride in tetrahydrofuran; hexanes; water T=65°C;