Problem description: Diaryliodonium triflates are often the most efficient in arylations, and electron-rich dummy ligands are commonly used to achieve chemoselective arylations. However, the synthesis of diaryliodonium triflates using route A with TfOH and electron-rich arenes 2, such as anisole, biphenyls, diaryl ethers and some heteroaryls may result in competing arene oxidation, leading to poor yields and black/discolored products instead of the desired offwhite solids. Although these salts often provide clean NMR spectra, they tend to display lower productivity in arylations. This is particularly problematic when the iodoarene 1 is electron-poor and reacts slowly with the oxidant, making the tosic acid conditions followed by anion exchange unsuitable.