1: 1-trifluoromethyl-4-bromobenzene With magnesium in tetrahydrofuran T=20°C; 1 h; 2: 4-fluorobenzaldehyde in tetrahydrofuran T=0 - 20°C; 2 h; 3: With 1,3-Diiodo-5,5-dimethyl-2,4-imidazolidinedione; potassium carbonate in tetrahydrofuran; tert-butyl alcohol 20 h; RefluxDarkness;

trifluorormethanesulfonic acid T=100°C; Friedel-Crafts aroylation; 144 h;

1: in tetrahydrofuran T=67°C; 6 h; Inert atmosphere; 2: With sulfuric acid; water in tetrahydrofuran Inert atmosphere;

methanesulfonic acid; phosphorus pentoxide T=100°C; Friedel-Crafts aroylation; 192 h;