Very interesting solvent effect described by Schoenebeck, making it possible to selectively couple @ C-Br, then @ C-OSO2F, and finally @ C-Cl bonds on a range of substrates.
M. Mendel, I. Kalvet, D. Hupperich, G. Magnin, and F. Schoenebeck, "Site-Selective, Modular Diversification of Polyhalogenated Aryl Fluorosulfates (ArOSO2
F) Enabled by an Air-Stable PdI
Dimer", Angewandte Chemie International Edition, vol. 59, pp. 2115-2119, 2019. http://dx.doi.org/10.1002/anie.201911465