(Z)-3-(2,3,4,5,6-pentamethylphenyl)-3-phenylacrylic acid

• 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: (Z)-3-(2,3,4,5,6-pentamethylphenyl)-3-phenylacrylic acid
• 英文别名: (Z)-3-(2,3,4,5,6-pentamethylphenyl)-3-phenylprop-2-enoic acid
• 化学式: C₂₀H₂₂O₂
• 分子量: 294.393
• InChiKey: RDCNUPWIGBAXIQ-WQRHYEAKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.6
• 重原子数：
  22
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  五甲基苯 、 苯丙炔酸 在 silver trifluoromethanesulfonate 、 platinum(II) chloride 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 48.0h， 以48.1%的产率得到(Z)-3-(2,3,4,5,6-pentamethylphenyl)-3-phenylacrylic acid
  参考文献：
  名称：

  PtCl2/AgOTf 系统催化丙炔酸及其酯与芳烃的高效选择性氢化芳基化

  摘要：

  PtCl2/AgOTf 催化的丙炔酸乙酯的加氢芳基化有效地进行，以良好至高产率得到 (2Z)-肉桂酸乙酯衍生物，而没有形成 (1E,3Z)-4-arylbuta-1,3-diene-1,3 二乙基酯-在 Pd(OAc)2 催化反应中观察到的二羧酸盐。尤其是，PtCl2/AgOTf 催化的丙炔酸加氢芳基化有效地进行，仅得到 (2Z)-肉桂酸。

  DOI：

  10.1016/j.tetlet.2005.03.179

文献信息

• Stereo- and Regioselective Addition of Arene to Alkyne Using Abnormal NHC Based Palladium Catalysts: Elucidating the Role of Trifluoroacetic Acid in Fujiwara Process
  作者：Pradip Kumar Hota、Anex Jose、Swadhin K. Mandal

  DOI：10.1021/acs.organomet.7b00649

  日期：2017.11.27

  (aNHC) based Pd catalysts have been used for the efficient hydroarylation of aromatic C–H bonds leading to new C–C bond formation through regio- and stereoselective addition to alkynes. The addition reaction has been realized by a catalytic amount of Pd (II) compound (0.5 mol %) in trifluoroacetic acid (TFA) under ambient conditions. Various arenes undergo transhydroarylation selectively across the triple

  近二十年前的藤原报道了炔烃的加氢芳基化反应。有趣的是，在不存在三氟乙酸的情况下该反应不会进行。然而，TFA的确切作用尚未明确确定，特别是在X射线晶体学的支持下，通过分离涉及TFA的催化活性物质。在这项工作中，异常N-杂环卡宾（一基于NHC）的Pd催化剂已用于芳族C-H键的有效加氢芳基化，从而通过向炔烃中进行区域和立体选择性加成而形成新的C-C键。通过在环境条件下在三氟乙酸（TFA）中催化量的Pd（II）化合物（0.5mol％）实现了加成反应。各种芳烃选择性地通过三键（包含官能团CO 2 Me，CO 2 Et和CO 2H），主要以高收率得到动力学控制的顺式加合物。已经概述了在环境条件下通过分子间反应的简单反应条件来合成香豆素衍生物，香豆素衍生物被认为是一类重要的生物活性化合物。注意到在没有TFA的情况下反应不会进行。因此，主要重点是了解TFA在此类氢芳基化反应中的作用。甲催化活性反应中间体，[一NHCPd（CF
• Efficient and selective hydroarylation of propiolic acids and their esters with arenes catalyzed by a PtCl2/AgOTf system
  作者：Juzo Oyamada、Tsugio Kitamura

  DOI：10.1016/j.tetlet.2005.03.179

  日期：2005.5

  PtCl2/AgOTf-catalyzed hydroarylation of ethyl propiolate proceeded effectively to give ethyl (2Z)-cinnamate derivatives in good to high yields, without the formation of diethyl (1E,3Z)-4-arylbuta-1,3-diene-1,3-dicarboxylates that was observed in Pd(OAc)2-catalyzed reaction. Especially, PtCl2/AgOTf-catalyzed hydroarylation of propiolic acids proceeded effectively to give (2Z)-cinnamic acids exclusively.

  PtCl2/AgOTf 催化的丙炔酸乙酯的加氢芳基化有效地进行，以良好至高产率得到 (2Z)-肉桂酸乙酯衍生物，而没有形成 (1E,3Z)-4-arylbuta-1,3-diene-1,3 二乙基酯-在 Pd(OAc)2 催化反应中观察到的二羧酸盐。尤其是，PtCl2/AgOTf 催化的丙炔酸加氢芳基化有效地进行，仅得到 (2Z)-肉桂酸。
• Novel Pd(II)- and Pt(II)-Catalyzed Regio- and Stereoselective <i>trans</i>-Hydroarylation of Alkynes by Simple Arenes
  作者：Chengguo Jia、Wenjun Lu、Juzo Oyamada、Tsugio Kitamura、Kenji Matsuda、Masahiro Irie、Yuzo Fujiwara

  DOI：10.1021/ja0005845

  日期：2000.8.1

  Efficient trans-hydroarylation of alkynes by simple arenes has been realized regio- and stereoselectively at room temperature in the presence of Pd(II) or Pt(II) catalysts and a mixed solvent containing trifluoroacetic acid (TFA). Various arenes undergo trans-hydroarylation selectively across terminal and internal C-C triple bonds-including those conjugated to CHO, COMe, CO2H, and CO2Et groups, affording kinetically controlled cis-arylalkenes predominantly in most cases, especially, in good yields for electron-rich arenes and activated alkynes. The formation of arene/alkyne 1/2 or 2/1 adducts as side products is dependent on the arenes' and alkynes' substituents, which can be suppressed in some cases by changing the catalyst, catalyst concentration, and reaction time. The Pt(II) system, PtCl2/2AgOAc/TFA, shows lower catalytic activity than Pd(OAc)(2)/TFA, but higher selectivity, giving higher yields of adducts at the same conversion. On the basis of several isotope experiments and control reactions, a possible mechanism involving electrophilic metalation of aromatic C-H bonds by in-situ-generated cationic Pd(II) and Pt(II) species leading to intermolecular trans-arylpalladation to alkynes has been discussed.
• Catalytic hydroarylation of alkynes with arenes in the presence of FeCl3 and AgOTf
  作者：Takuya Hashimoto、Shahajahan Kutubi、Takayuki Izumi、Ataur Rahman、Tsugio Kitamura

  DOI：10.1016/j.jorganchem.2010.08.009

  日期：2011.1

  Hydroarylation of propiolic acids with various arenes in TFA proceeded efficiently in the presence of FeCl3/AgOTf catalyst system. In the case of electron-rich arenes, the iron-catalyzed hydroarylation gave cinnamic acids in moderate to high yields. The hydroarylation of phenylacetylene was observed but the catalyst was not effective under the same conditions. (C) 2010 Elsevier B.V. All rights reserved.
• Highly selective hydroarylation of propiolic acid derivatives using a PtCl2/AgOTf catalytic system
  作者：Juzo Oyamada、Tsugio Kitamura

  DOI：10.1016/j.tet.2007.09.076

  日期：2007.12

  Hydroarylation of propiolic acid derivatives with arenes in trifluoroacetic acid efficiently proceeded in the presence Of PtCl2/AgOTf catalyst to give cis-cinnamic acid derivatives in good to high yields. This PtCl2/AgOTf-catalyzed reaction did not afford any 4-arylbuta-1,3-diene-1,3-dicarboxylic acid derivatives formed by Pd(OAc)(2)-catalyzed hydroarylation. The specific optimization of the catalytic hydroarylation and application to electron-rich arenes are reported. (c) 2007 Elsevier Ltd. All rights reserved.