Approaches to prepare perfluoroalkyl and pentafluorophenyl copper couples for cross-coupling reactions with organohalogen compounds
作者:Mikhail M. Kremlev、Aleksej I. Mushta、Wieland Tyrra、Yurii L. Yagupolskii、Dieter Naumann、Mathias Schäfer
DOI:10.1039/c5dt02925b
日期:——
perfluoroorgano silver(I) reagents, AgRf, and elemental copper through redox transmetallations. The composition of the resulting reactive intermediates was investigated by means of 19F NMR spectroscopy and ESI mass spectrometry. Perfluoro-n-propyl and perfluoro-n-butyl copper–silver reagents prepared by the oxidative transmetallation route exhibited good properties in C–C bond formation reactions with acid
碘氟代烷烃C n F 2 n +1 I(n = 2、3、4)和n -BuLi在低温下的反应为LiC n F 2 n +1的NMR光谱学证据提供了证据,该LiC n F 2 n +1转化为LiCu(C n F 2)ñ 1)2在与0.5摩尔铜(治疗衍生物我),溴化的CuBr。获得全氟有机铜对Cu(R f)2 Ag(R f = n -C 3 F 7,n-C 4 F 9,C 6 F 5)是通过相应的全氟有机银(I)试剂AgR f和元素铜通过氧化还原金属转移反应而获得的。通过19 F NMR光谱法和ESI质谱法研究所得的反应性中间体的组成。全氟正丙基和全氟正通过氧化性金属转移途径制备的丁基铜-银试剂即使在中等条件下,在与酰氯的C-C键形成反应中也表现出良好的性能。在高温下,与氟原子直接键合到芳族化合物上的溴取代反应得以实现,而使用锂铜对进行卤化物取代反应的成功率仍然很低。
A class of effective decarboxylative perfluoroalkylating reagents: [(phen)<sub>2</sub>Cu](O<sub>2</sub>CR<sub>F</sub>)
作者:Yangjie Huang、Manjaly J. Ajitha、Kuo-Wei Huang、Zhongxing Zhang、Zhiqiang Weng
DOI:10.1039/c6dt00277c
日期:——
[(phen)2Cu](O2CRF) (1) for the decarboxylative perfluoroalkylation of aryl and heteroaryl halides. Treatment of copper tert-butyloxide with phenanthroline ligands, with subsequent addition of perfluorocarboxylic acids afforded air-stable copper(I) perfluorocarboxylato complexes 1. These complexes reacted with a variety of aryl and heteroaryl halides to form perfluoroalkyl(hetero)arenes in moderate to high
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。
A General, Regiospecific Synthetic Route to Perfluoroalkylated Arenes via Arenediazonium Salts with R<sub>F</sub>Cu(CH<sub>3</sub>CN) Complexes
A mild method of converting arylamines into perfluoroalkylatedarenes is described. Relatively stable RFCu(CH3CN) complexes are used as perfluoroalkylating agents, which react smoothly with arenediazoniumsalts to produce various perfluoroalkylarenes in good yields. Based on the results of clock trapping experiments with diallyl ether, a radical process might be involved in the reaction.
Copper-Mediated Aerobic Fluoroalkylation of Arylboronic Acids with Fluoroalkyl Iodides at Room Temperature
作者:Qingqing Qi、Qilong Shen、Long Lu
DOI:10.1021/ja301705z
日期:2012.4.18
A Cu-mediated ligandless aerobic fluoroalkylation of arylboronic acids under mild conditions is described for the first time. The reaction tolerates a wide range of functional groups, allowing for further transformation. Mechanistic studies suggest that [R(f)Cu] is the active Cu species that forms the desired perfluoroalkylarenes and that [R(f)Cu] is generated from [PhCu] by either an oxidative addition/reductive
首次描述了在温和条件下 Cu 介导的无配体有氧氟烷基化芳基硼酸。该反应耐受范围广泛的官能团,允许进一步转化。机理研究表明,[R(f)Cu] 是形成所需全氟烷基芳烃的活性铜物质,[R(f)Cu] 是通过氧化加成/还原消除机制或通过亲核取代从 [PhCu] 生成的卤素“吃了”中间体。