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 (ArOSO
F) Enabled by an Air‐Stable Pd
Dimer", Angewandte Chemie International Edition, vol. 59, pp. 2115-2119, 2020. http://dx.doi.org/10.1002/anie.201911465