1: 2-methyl-4-trifluoromethylphenyl iodide With iodine; magnesium in tetrahydrofuran; dibromoethane, 1,2- T=-10°C; 15 h; Heating / reflux; 2: carbon dioxide in tetrahydrofuran; dibromoethane, 1,2- T=5°C; 3: With hydrogenchloride in tetrahydrofuran; dibromoethane, 1,2-; water

1: With sulfuric acid; sodium nitrite in ethanol; water T=0°C; 1 h; 2: With sodium iodide in ethanol; water T=0 - 20°C; 1.5 h;

N-iodo-succinimide T=0 - 20°C; 0.333333 h;