Sequential C−F Bond Transformation of the Difluoromethylene Unit in Perfluoroalkyl Groups: A Combination of Fine‐Tuned Phenothiazine Photoredox Catalyst and Lewis Acid
Copper-Catalyzed Oxidative Perfluoroalkylation of Aryl Boronic Acids Using Perfluoroalkylzinc Reagents
作者:Xifei Bao、Lihua Liu、Junlan Li、Shilu Fan
DOI:10.1021/acs.joc.7b02557
日期:2018.1.5
An efficient and synthetically convenient method for copper-catalyzed cross-coupling of aryl boronic acids with perfluoroalkyl zinc reagents has been described. The reaction proceeds under mild reaction conditions with a high efficiency and broad substrate scope and provides a general access to perfluoroalkylated arenes, which are of interest in life and materials science.
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。
New Methods of Free-Radical Perfluoroalkylation of Aromatics and Alkenes. Absolute Rate Constants and Partial Rate Factors for the Homolytic Aromatic Substitution by <i>n</i>-Perfluorobutyl Radical
n-C(4)F(9)I has been utilized as source of C(4)F(9)(*) radical through iodine abstraction by phenyl or methyl radical. The reaction with alkenes, carried out in the presence of catalytic amount of Cu(OAc)(2), leads to substitution by a mechanism substantially identical to the aromatic substitution and not to the usual chain addition of perfluoroalkyl group and iodine atom to the double bond. This has
A highly chemoselective perfluoroalkylation reaction of aromatic halides is reported. Thermally stable perfluoroalkylzinc reagents, generated by a rapid halogen–zinc exchange reaction between diorganozinc and perfluoroalkyl halide species, couple with a wide range of aryl halides in the presence of a copper catalyst, in moderate to high yields. Good stability of the perfluoroalkylzinc species was indicated