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A Cu-mediated ligandless aerobic fluoroalkylation of arylboronic acids under mild conditions is described for the first time. The reaction tolerates a wide range of functional groups, allowing for further transformation. Mechanistic studies suggest that R(f)Cu is the active Cu species that forms the desired perfluoroalkylarenes and that R(f)Cu is generated from PhCu by either an oxidative addition/reductive elimination mechanism or nucleophilic substitution via a halogen "ate" intermediate.
Qi et al. (2012) studied this question.