(untitled) - Davies, J S. H; McCrea, P A; Norris, W L; Ramage, G R (J. Chem. Soc., 1950)
The Fries rearrangement using the BF3·2CH3CO2H complex was reported. The complex acts as an acyl donor, but the rearrangement of reactants having electron-withdrawing groups was not investigated, see: