How is 2',2,5 Trichloroacetophenone (CAS: 7396-79-4) typically synthesized?

2',2,5 Trichloroacetophenone (CAS: 7396-79-4) can be synthesized via the chlorination of acetophenone using thionyl chloride or phosphorus trichloride as a chlorinating agent. The reaction is typically carried out under anhydrous conditions in a suitable solvent such as tetrahydrofuran (THF) or dichloromethane. The yield of the product can be enhanced by the use of a phase-transfer catalyst and appropriate reaction conditions.