Table 3.

Scope studies: arene variation.^[a]

^[a]Unless otherwise noted, reaction conditions include: substrate (0.5 mmol), 4-CH₃C₆H₄I(O₂CCF₃)₂ (0.55 mmol), Et₃N (0.125 mmol), CF₃CH₂OH, 0 °C, followed by Cu(hfacac)₂ (0.1 mmol) and Et₃N (2 mmol), 23 °C; monitored by TLC analysis until consumption of the substrate, then diaryliodonium salt.

^[b]50 °C for iodonium salt formation.

^[c]3 equiv of hydroxyl(tosyloxy)iodobenzene as oxidant.

^[d]hexafluoroisopropanol as solvent, 23 °C for iodonium salt formation.