A New Portal to SuFEx Click Chemistry: A Stable Fluorosulfuryl Imidazolium Salt Emerging as an “F−SO<sub>2</sub>
+” Donor of Unprecedented Reactivity, Selectivity, and Scope
作者:Taijie Guo、Genyi Meng、Xiongjie Zhan、Qian Yang、Tiancheng Ma、Long Xu、K. Barry Sharpless、Jiajia Dong
DOI:10.1002/anie.201712429
日期:2018.3.1
in highly functional molecules. We now report that a solid fluorosulfuryl imidazolium triflate salt delivers the same “F−SO2+” fragment to Nu−H acceptor groups in the substrates. However, this triflate salt is a far more reactive fluorosulfurylating agent than SO2F2 and displays selectivity preferences of its own. Moreover, the new azolium triflate reagent reacts once with primary amines and anilines
已经发现,硫酰氟SO 2 F 2在各种环境中,甚至在高功能分子中,都可以使苯酚衍生化。现在,我们报告固体三氟甲磺酸氟磺酰基咪唑鎓盐向底物中的Nu-H受体基团传递相同的“ F-SO 2 + ”片段。但是,这种三氟甲磺酸盐是一种比SO 2 F 2更具活性的氟磺化剂,并显示出其自身的选择性偏好。而且,在停止反应之前,新的三氟甲磺酸偶氮鎓试剂与伯胺和苯胺反应一次。另一方面,用三乙胺和两当量的“ F-SO 2 +“供体存在,它以良好的收率继续进行双(氟硫磺酰基)酰亚胺的转化-这是我们从未见过的两个重要的转化反应,我们将磺酰氟用作亲电试剂。