Heterogeneous Photoinduced Homolytic Aromatic Substitution of Electron-Rich Arenes with Perfluoroalkyl Groups in Water and Aqueous Media - A Radical-Ion Reaction
作者:Sebastián Barata-Vallejo、Marina Martín Flesia、Beatriz Lantaño、Juan E. Argüello、Alicia B. Peñéñory、Al Postigo
DOI:10.1002/ejoc.201201271
日期:2013.2
transfer (PET) substitutionreaction of electron-rich aromatic nuclei with perfluoroalkyl Rf groups was carried out in water or aqueous mixtures to render substitution products resulting from replacement of aromatic H atoms with the Rf moiety in good yields (57–88 %). Some mechanistic aspects are discussed, supporting the notion of a PET reaction leading to a classical radical homolyticaromatic substitution
富电子芳香核与全氟烷基 Rf 基团的光诱导电子转移 (PET) 取代反应在水或水性混合物中进行,以良好的产率 (57-88%) 提供由 Rf 部分取代芳香族 H 原子产生的取代产物)。讨论了一些机理方面,支持 PET 反应的概念,导致经典的自由基均裂芳烃取代 (HAS),然后是电子转移 (ET),然后是质子转移 (PT) 序列。提出了一种叠加在氧化还原过程上的自由基机制来解释产品的形成。
Direct CH perfluoroalkylation of (di)benzo(hetero)arenes in aqueous media
作者:Beatriz Lantaño、Sebastián Barata-Vallejo、M. Rosario Torviso、Sergio M. Bonesi、Juan E. Argüello、Al Postigo
DOI:10.1016/j.jfluchem.2014.02.008
日期:2014.5
of benzo- and dibenzo-(hetero)aromatic compounds without formal leaving groups is achieved efficiently in organic solvent: water mixtures under photostimulation. The methodology is compared to previously reported trifluoromethylation strategies of these nuclei in terms of product yields and regioselectivity. The global reaction is a radical homolytic aromaticsubstitution process, where the perfluoroalkyl-substituted