Arenes lacking electron-donating substituents are less reactive under EAS conditions, and TFE or a TFE:CH2Cl2 mixture was not sufficiently activating to allow reaction of 7a with benzene at rt. Fortunately, the use of hexafluoroisopropanol (HFIP) or trifluoroacetic acid (TFA) further enhances the reactivity of 7, and enabled the synthesis of products 3m and 3n. While the triflate analogues of 3m and 3n can be efficiently made by route A, the updated route C is useful when targeting diaryliodonium tosylates from EWGsubstituted iodoarenes 1, as the counterion exchange from OTf to OTs is avoided.