Reactions in the presence of aryne or radical scavengers (furan or 1,1-diphenylethylene (DPE)), did not influence the reaction outcome, indicating that such pathways are unlikely (Scheme 4C). When a crossover experiment was performed with diaryliodonium salts 1e and 1f, no traces of cross-over product was detected (Scheme 4D). All the experimental findings support the proposed mechanism with initial SNAr followed by hydrolysis of the xanthogenate and intramolecular aryl transfer.