1,2,4-Trichloro-5-iodobenzene is used as a reagent in the synthesis of sterically hindered polychlorinated biphenyls (PCBs) via Suzuki and Ullmannn reactions.
Joshi, S.N., et al.: Synthesis, no vol., 1045 (2011); Kania-Korwel, I., et al.: Chemosphere, 56, 735 (2004)