Vic-Difluorination proceeds by the reaction of fluoroalkenes with xenondifluoride to afford the corresponding fluorinated compounds. From the reaction with polyfluoroalkenes, the products are obtained in high to excellent yields. In this reaction, the fluorine atom substituent of alkene stabilizes the cation intermediate and suppresses side-reactions such as rearrangement.
作者:Schlögl, Johanna、Goldammer, Ole、Bader, Julia、Emmerling, Franziska、Riedel, Sebastian
DOI:10.1039/d4sc01753f
日期:——
Common Lewis superacids often suffer from low thermal stability or complicated synthetic protocols, requiring multi-step procedures and expensive starting materials. This prevents their large-scale application. Herein, the easy and comparably cheap synthesis of high-purity aluminium tris(fluorosulfate) ([Al(SO3F)3]x, AFS) is presented. All starting materials are commercially available and no work-up
常见的路易斯超强酸通常具有低热稳定性或复杂的合成方案,需要多步骤程序和昂贵的起始材料。这阻碍了它们的大规模应用。在此,提出了高纯度三(氟硫酸)铝([Al(SO 3 F) 3 ] x ,AFS)的简单且相对便宜的合成方法。所有起始材料均可商购,无需后处理。使用理论和实验方法证明了这种热稳定的聚合路易斯酸的超强酸性。此外,还显示了其合成和催化适用性,例如在键异解反应和 C-F 键活化中。