When preparing diaryliodonium salts with electron-deficient and/or ortho-/meta-substituted Ar 2 groups, EAS works poorly and the Ar 2 -ligand is preferably delivered using an aryl-boron, -silane orstannane reagent. To complement the scope of Route A, our group reported a regiospecific one-pot synthesis of diaryliodonium tetrafluoroborates from iodoarenes 1 and low-toxic arylboronic acids 4 in the presence of the Lewis acid BF3•OEt2 (Route B). While procedures A and B are performed in one-pot, the synthesis of 3 can also be performed as a two-step