Fluorinated Sulfilimino Iminiums: Efficient and Versatile Sources of Perfluoroalkyl Radicals under Photoredox Catalysis
作者:Marion Daniel、Guillaume Dagousset、Patrick Diter、Pierre-André Klein、Béatrice Tuccio、Anne-Marie Goncalves、Géraldine Masson、Emmanuel Magnier
DOI:10.1002/anie.201700290
日期:2017.3.27
Reported herein is the use of S‐perfluoroalkyl sulfilimino iminiums as a new source of RF radicals under visible‐light photoredox catalysis (RF=CF3, C4F9, CF2Br, CFCl2). These shelf‐stable perfluoroalkyl reagents, readily prepared on gram scale from the corresponding sulfoxide using a one‐pot procedure, allow the efficient photoredox‐induced oxyperfluoroalkylation of various alkenes using fac‐Ir(ppy)3
本文报道了在可见光光氧化还原催化下(R F = CF 3,C 4 F 9,CF 2 Br,CFCl 2)使用S-全氟烷基亚磺酰亚胺基亚胺作为R F自由基的新来源。这些易于储存的全氟烷基试剂可以通过一锅法从相应的亚砜以克为单位轻松制备,可以使用fac-Ir(ppy)3作为光催化剂,对各种烯烃进行有效的光氧化还原诱导的全氟烷基氧化。重要的是,进行了自旋俘获/电子顺磁共振实验以表征参与该自由基/阳离子过程的所有自由基中间体。