This article discusses the synthesis of 2-trifluoromethylated indoles using Langlois' reagent and UV light irradiation. Trifluoromethylated indoles have various applications in pharmaceuticals, agrochemicals, polymers, and materials. The authors present their own work on the photoinduced synthesis of 2-trifluoromethylindole derivatives using CF3SO2Na under UV irradiation and air atmosphere without an external photocatalyst. The study optimized the reaction conditions and proposed a plausible reaction mechanism. The method is simple, efficient, and does not require the use of a photocatalyst, metal, or oxidant. The document also provides spectroscopic data for various synthesized compounds. [Extracted from the article]