The general steps for synthesizing 2-trifluoromethyl-4-cyanobenzenamine from 1-(trifluoromethyl)-1,2-phenyliodono-3(1H)-one and p-aminobenzonitrile are as follows: in this embodiment of the method of preparing trifluoromethyl aromatic amine, p-cyanobenzenamine was selected as the aromatic amine, and the reaction time was 12 hours, and the rest of the reaction conditions and the post-processing steps were kept the same as in Example 28. The specific reaction process parameters were as follows: 1-(trifluoromethyl)-1,2-phenyliodono-3(1H)-one (0.5 mmol, 1.0 eq.), p-aminobenzonitrile (1.5 mmol, 3.0 eq.), nickel hydroxide (10 mol%), and potassium carbonate (1.5 mmol, 3.0 eq.) were dissolved in DMSO (2 mL), and the reaction was carried out for 2 hr at 35 °C. The subsequent reaction and post-treatment procedures were carried out with reference to Example 1.
