1: 2-(2-fluoro-pyridin-4-yl)-1-(3-methylphenyl)ethanone With bromine in acetic acid T=20°C; 2 h; 2: 4-(methylsulfanyl)benzenecarbothioamide in N,N-dimethyl-formamide T=20°C; 15 h;

3-chloro-benzenecarboperoxoic acid in N,N-dimethyl-formamide T=20°C; 1 h;