(E)-3-methoxy-α-(phenylmethylene)benzeneacetic acid | 24297-98-1

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 英文名称: (E)-3-methoxy-α-(phenylmethylene)benzeneacetic acid
• 英文别名: α--trans-zimtsaeure；α-(m-Methoxy-phenyl)-trans-zimtsaeure；trans-2-<3-Methoxy-phenyl>-3-phenyl-acrylsaeure；α-(3-Methoxy-phenyl)-trans-zimtsaeure；(E)-2-(3-methoxyphenyl)-3-phenylprop-2-enoic acid
• CAS: 24297-98-1
• 化学式: C₁₆H₁₄O₃
• 分子量: 254.285
• InChiKey: UKNNRXDMINQXTA-XNTDXEJSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  19
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.06
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (E)-3-methoxy-α-(phenylmethylene)benzeneacetic acid 在 草酰氯 、 N,N-二甲基甲酰胺 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 生成
  参考文献：
  名称：

  通过双C（sp 2）-H键活化形成Pd催化的脱氢芳基-芳基键：有效合成[3,4]-熔融吲哚

  摘要：

  开发了Pd（0）催化的容易获得的邻溴代苯甲酰苯胺的双环化反应，导致应变的[3,4]稠合的吲哚。该反应通过一个高度有序的过程进行，该过程涉及关键的碳pal触，1,4-Pd迁移和C（sp 2）–H官能化步骤。

  DOI：

  10.1021/ol503442n
• 作为产物：
  描述：

  3-甲氧基苯乙酸 、 苯甲醛 以43%的产率得到
  参考文献：
  名称：

  HALTON, B.;MAIDMENT, A. I.;OFFICER, D. L.;WARNES, J. M., AUSTRAL. J. CHEM., 1984, 37, N 10, 2119-2128

  摘要：

  DOI：

文献信息

• Reactions of Carbonyl Compounds in Basic Solutions. Part 34. The Mechanism of the Base-Catalysed Ring Fission of 2,3-Diphenylcycloprop-2-en-1-one
  作者：Keith Bowden、Emma J. Burgess

  DOI：10.1135/cccc19991594

  日期：——

  The rate coefficients for the base-catalysed ring fission of a series of 2-phenyl-3-(2-, 3- or 4-substituted phenyl)cycloprop-2-en-1-ones to give the corresponding (E)-2,3-diphenylacrylic acids have been determined in water at 30.0 °C, as well as for the unsubstituted compound at 40.0, 50.0 and 60.0 °C. The effects of meta- and para-substituents on the rates have been correlated using the Hammett equation to give a reaction constant, ρ, equal to ca 1.2 at 30 °C. For the unsubstituted compound, the activation parameters have been calculated and the kinetic solvent isotope effect has been studied. The effects of ortho-substituents on the rates appear to be mainly polar, rather than steric, in origin. The evidence indicates a mechanistic pathway which proceeds by addition of hydroxide anion to the ketone, which is rate-determining. The adduct suffers ring fission to give the final product via a carbanionic intermediate.

  一系列2-苯基-3-(2-, 3- 或 4-取代苯基)环丙烯酮在30.0°C的水中的碱催化环裂速率系数已确定，以及未取代化合物在40.0、50.0和60.0°C的速率系数。利用Hammett方程相关了对速率的间位和对位取代基的影响，得到在30°C时等于约1.2的反应常数ρ。对于未取代化合物，已计算了活化参数并研究了动力学溶剂同位素效应。取代基对速率的影响似乎主要是极性的，而不是立体的。证据表明，该机理途径通过氢氧根离子加成到酮中，这是决定速率的步骤。该加合物经历环裂，生成最终产物，通过一个碳负离子中间体。
• Asymmetric transfer hydrogenation of 2,3-diphenylpropenoic acids over heterogeneous palladium catalysts modified by cinchona alkaloids
  作者：György Szőllősi、Vivien Erzsébet Resch、Vanessza Judit Kolcsár

  DOI：10.1016/j.jcat.2024.115290

  日期：2024.1

  supported palladium catalysts modified by dihydrocinchonidine carried out in ordinary laboratory glassware using easily available, cheap hydrogen donor, potassium formate. High conversions and good enantioselectivities were obtained in transfer hydrogenations of various acids substituted on phenyl rings. Results obtained with various acid derivatives and with few cinchona alkaloid modifiers indicated that

  不对称催化方法是光学纯有机化合物的便捷合成方法之一，其中许多是有价值的药物中间体。应用多相催化剂可能有助于其经济和环境友好的合成。在分子中引入手性中心的最简单且常用的方法之一是还原前手性不饱和化合物。尽管已知有几种使用手性改性金属的非均相催化体系，但此类催化剂从未应用于不对称转移氢化。在此，我们报道了在普通实验室玻璃器皿中使用容易获得、廉价的氢供体甲酸钾在二氢辛可尼定改性的负载钯催化剂上进行()-2,3-二苯基丙烯酸的对映选择性转移氢化。在苯环上取代的各种酸的转移氢化中获得了高转化率和良好的对映选择性。使用各种酸衍生物和少量金鸡纳生物碱改性剂获得的结果表明，转移氢化通过与分子氢的对映选择性氢化类似的表面中间体发生。氘示踪剂研究表明，产品中氘的掺入量较低，可能是由于甲酸盐的解离以及与表面移动氢的交换，然而，这些过程受到供体阳离子的强烈影响。不对称转移氢化可以在超过2g的规模下进行，因此可以用
• Structural requirements for substrate in highly enantioselective hydrogenation over the cinchonidine-modified Pd/C
  作者：Takashi Sugimura、Takayuki Uchida、Junya Watanabe、Takeshi Kubota、Yasuaki Okamoto、Tomonori Misaki、Tadashi Okuyama

  DOI：10.1016/j.jcat.2008.11.022

  日期：2009.2.15

  Relationship between substrate Structure and enantioselectivity is studied for the asymmetric hydrogenation of 42 different (E)-alpha, beta-disubstituted acrylic acids (propenoic acids) over cinchonidine-modified Pd/C. The beta-phenyl group is indispensable for high enantioselectivity of alpha-phenylcinnamic acid (2,3-diphenylpropenoic acid, 81% ee), and substitution on this group affects markedly the selectivity. The high ee up to 92% was achieved by the beta-p-alkoxyphenyl substitution, and the selectivity is ascribed mainly to stronger interaction of the substrate with the chiral modifier on the catalyst surface. In contrast, substitution on the alpha-phenyl group does not affect notably the enantioselectivity (80-82% ee) or even the alpha-phenyl group itself is not indispensable but replaceable with a properly bulky group for the high enantioselectivity, (C) 2008 Elsevier Inc. All rights reserved.
• Misic-Vukovic, Milica; Drmanic, Sasa; Jovanovic, Bratislav, Heterocycles, 1994, vol. 37, # 3, p. 1503 - 1510
  作者：Misic-Vukovic, Milica、Drmanic, Sasa、Jovanovic, Bratislav

  DOI：——

  日期：——
• Pd-Catalyzed Dehydrogenative Aryl–Aryl Bond Formation via Double C(sp²)–H Bond Activation: Efficient Synthesis of [3,4]-Fused Oxindoles
  作者：Ala Bunescu、Tiffany Piou、Qian Wang、Jieping Zhu

  DOI：10.1021/ol503442n

  日期：2015.1.16

  A Pd(0)-catalyzed double cyclization of easily available o-bromoanilides leading to strained [3,4]-fused oxindoles was developed. The reaction proceeded through a highly ordered sequence involving key carbopalladation, 1,4-Pd migration, and C(sp2)–H functionalization steps.

  开发了Pd（0）催化的容易获得的邻溴代苯甲酰苯胺的双环化反应，导致应变的[3,4]稠合的吲哚。该反应通过一个高度有序的过程进行，该过程涉及关键的碳pal触，1,4-Pd迁移和C（sp 2）–H官能化步骤。