2,3,4,5,6-pentafluoro-3',4'-dimethyl-1,1'-biphenyl

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2,3,4,5,6-pentafluoro-3',4'-dimethyl-1,1'-biphenyl
• 英文别名: 2,3,4,5,6-pentafluoro-3',4'-dimethylbiphenyl；1-(3,4-Dimethylphenyl)-2,3,4,5,6-pentafluorobenzene
• 化学式: C₁₄H₉F₅
• 分子量: 272.217
• InChiKey: DIHABVRLEAAVBN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  19
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  邻二甲苯 、 五氟苯 在 氧气 、 palladium diacetate 、 DL-焦谷氨酸 、 三甲基乙酸 作用下， 以 N,N-二甲基乙酰胺 为溶剂， 120.0 ℃ 、101.33 kPa 条件下， 反应 16.0h， 以54%的产率得到2,3,4,5,6-pentafluoro-3',4'-dimethyl-1,1'-biphenyl
  参考文献：
  名称：

  以分子氧为唯一氧化剂的钯催化多氟芳烃的烯烃氧化和芳基化

  摘要：

  已经开发了钯催化的多氟芳烃与烯烃或简单芳烃的交叉脱氢偶联。该方法的特征在于使用分子氧的大气压作为唯一的氧化剂，并提供了直接且对环境无害的官能化多氟芳烃途径。

  DOI：

  10.1002/adsc.201500632

文献信息

• Fluorinated biphenyls from aromatic arylations with pentafluorobenzenediazonium and related cations. Competition between arylation and azo coupling
  作者：Dmitry Kosynkin、T. Michael Bockman、Jay K. Kochi

  DOI：10.1039/a701745f

  日期：——

  High yields of the mixed perfluorinated biaryls (C6F5–Ar) are obtained by the catalytic dediazoniation of the pentafluorobenzenediazonium salt (C6F5N2+BF4–) in acetonitrile solutions containing various aromatic substrates (ArH) together with small amounts of iodide salts. Activated (electron-rich) as well as deactivated (electron-poor) arenes are successfully pentafluorophenylated by this method. The arylation is distinct from the azo coupling of the same substrates, which takes place in the absence of the iodide catalyst and yields the corresponding diazene (C6F5NN–Ar) as product. The catalytic role of iodide, and the isomeric product distributions obtained with this procedure indicate that the arylation proceeds via the pentafluorophenyl radical in a efficient homolytic chain process. Since azo coupling involves electrophilic aromatic substitution of electron-rich ArH by C6F5N2+, the two competing pathways are distinct and do not have reactive intermediates in common.

  通过催化脱重氮化反应，在含有各种芳香族底物（ArH）及少量碘化盐的乙腈溶液中，五氟苯重氮盐（C6F5N2+BF4–）能够高效生成混合全氟联苯（C6F5–Ar），产率较高。无论是活化的（电子富集的）还是去活化的（电子贫乏的）芳香族化合物，都能通过此方法成功实现五氟苯基化。这种芳基化反应与同种底物的偶氮耦合反应截然不同，后者在无碘催化剂存在下进行，产物为相应重氮烯（C6F5NN–Ar）。碘化物在催化中的作用以及由此过程获得的不同异构产物分布表明，芳基化反应是通过高效的均裂链式过程，经由五氟苯基自由基进行的。由于偶氮耦合涉及电子富集的ArH通过亲电芳香取代反应与C6F5N2+的结合，这两种竞争路径是不同的，且没有共同的反应中间体。
• Gold-Catalyzed Direct Oxidative Arylation with Boron Coupling Partners
  作者：Manuel Hofer、Alexandre Genoux、Roopender Kumar、Cristina Nevado

  DOI：10.1002/anie.201610457

  日期：2017.1.19

  An efficient synthesis of biaryls through a gold‐catalyzed oxidative cross‐coupling of arenes with strong electron‐deprived aryl boronates is presented herein. Regio‐ and chemocontrol are achieved by the selective activation of these coupling partners by gold at different oxidation states. Under reaction conditions devoid of basic additives or directing groups, the role of acetato ligand as an internal

  本文介绍了通过金催化的芳烃与强电子剥夺的芳基硼酸酯的氧化交叉偶联有效合成联芳基的方法。区域和化学控制是通过在不同氧化态下金选择性激活这些偶联配偶体来实现的。在没有碱性添加剂或指导基团的反应条件下，已揭示了乙酰基配体作为内部碱的作用，是扩大这些转化反应范围的关键参数。
• Pd-catalyzed decarboxylative cross-coupling of perfluorobenzoic acids with simple arenes
  作者：Hai-Qing Luo、Wen Dong、Teck-Peng Loh

  DOI：10.1016/j.tetlet.2013.03.086

  日期：2013.5

  Using a Pd/Ag bimetallic system, arylations of simple arenes with perfluorobenzoic acids have been achieved by decarboxylative C-H bond functionalization, providing the desired cross-coupling products in moderate to good yields. These straightforward protocols provide new and efficient methods for the synthesis of fluorobiphenyl scaffolds under simple and mild conditions. (C) 2013 Elsevier Ltd. All rights reserved.
• Palladium-Catalyzed Cross-Coupling of Polyfluoroarenes with Simple Arenes
  作者：Hu Li、Jia Liu、Chang-Liang Sun、Bi-Jie Li、Zhang-Jie Shi

  DOI：10.1021/ol102688e

  日期：2011.1.21

  The most efficient method to construct biaryls is the direct dehydrogenative cross-coupling of two different aromatic rings. Such an ideal cross arylation starting from distinct polyfluoroarenes and simple arenes was presented. The selectivity of the cross-coupling was controlled by both of the electronic property of fluoroarenes and steric hindrance of simple arenes. Diisopropyl sulfide was essential to promote the efficacy.
• Pentafluorophenylation of aromatics with pentafluorophenyl perfluoro- and polyfluoroalkanesulfonates. A photoinduced electron-transfer cation diradical coupling process
  作者：Qing Yun Chen、Zhan Ting Li

  DOI：10.1021/jo00061a041

  日期：1993.4

  Irradiation of pentafluorophenyl perfluoro- and polyfluoroalkanesulfonates 1 with arenes, aromatic ethers, anilines, pyrroles, indoles, and phenols results in the corresponding pentafluorophenylated aromatic compounds. An electron-transfer mechanism is proposed.