Fig. 2: Overview of previous and current work.

a Previous Lewis base catalysts in halogenation. b Limitations of DMSO as catalysts in halogenation. c This work: nitroxides as general catalysts in halogenation.
a Previous Lewis base catalysts in halogenation. b Limitations of DMSO as catalysts in halogenation. c This work: nitroxides as general catalysts in halogenation.