Ir-Catalyzed Preparation of SF5-Substituted Potassium Aryl Trifluoroborates via C–H Borylation and Their Application in the Suzuki–Miyaura Reaction
摘要:
The preparation of new pentafluorosulfanyl-substituted potassium aryltrifluoroborates via Ir-catalyzed C-H borylation is reported. The utility of these novel building blocks was demonstrated in the Suzuki-Miyaura cross-coupling reaction, giving access to 3,5-disubstituted pentafluorosulfanylbenzenes.
We report a new protocol to form pentafluorosulfanyl (hetero)arenes via chlorine-fluorine exchange of (hetero)aryl tetrafluorosulfanyl chlorides by AgBF4. The method enables access to electron-deficient SF5(hetero)arenes, which are targets that are difficult to synthesize. Two advantages of AgBF4 are its ease of handling and stability. This would be a general transformation protocol.