The general procedure for synthesizing 2-amino-5-chlorobenzotrifluoride from 1-(trifluoromethyl)-1,2-phenyliodonyl-3(1H)-one and 4-chloroaniline is as follows: in this embodiment, p-chloroaniline was used as the aromatic amine, and the rest of the reaction and post-processing steps were the same as in Example 28. The specific reaction conditions were as follows: 1-(trifluoromethyl)-1,2-phenyliodono-3(1H)-one (0.5 mmol, 1.0 eq.), 4-chloroaniline (1.5 mmol, 3.0 eq.), nickel hydroxide (10 μmol), 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. After the reaction was completed, the product was isolated and purified according to the post-processing procedure in Example 1.