A novel strategy for the synthesis of arylsulfur pentafluorides by silver carbonate-induced Cl–F exchange fluorination of arylsulfur chlorotetrafluorides is reported. This fluorination does not require any exogenous fluoride sources. Rather, the reaction proceeds via the self-immolation of the substrate Ar-SF4Cl.
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.
Enhanced preparation of aryl and heteryl sulfur pentafluorides using mercury (II) oxide - hydrogen fluoride media as a fluorinating reagent
作者:Olexandr I. Guzyr、Volodymyr N. Kozel、Eduard B. Rusanov、Alexander B. Rozhenko、Volodymyr N. Fetyukhin、Yuriy G. Shermolovich
DOI:10.1016/j.jfluchem.2020.109635
日期:2020.11
We developed enhanced method for low temperature and good yield preparation of aryl and heteryl sulfur pentafluorides from chlorotetrafluorides using mercury oxide - hydrogenfluoride and mercury oxide - pyridiniumpoly(hydrogenfluoride) media as the fluorinating reagents.