cis-2-Methyl-α-phenyl-zimtsaeure | 22161-30-4

• 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: cis-2-Methyl-α-phenyl-zimtsaeure
• 英文别名: cis-2-Phenyl-<2-methyl-zimtsaeure>；trans-3-<2-Methyl-phenyl>-2-phenyl-acrylsaeure；trans-2-Phenyl-<2-methyl-zimtsaeure>；cis-α-Phenyl-2-methyl-zimtsaeure；alpha-Phenyl-2-methylcinnamic acid；(E)-3-(2-methylphenyl)-2-phenylprop-2-enoic acid
• CAS: 22161-30-4
• 化学式: C₁₆H₁₄O₂
• 分子量: 238.286
• InChiKey: KHANWKKJVBIUOJ-RVDMUPIBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.06
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  cis-2-Methyl-α-phenyl-zimtsaeure 在 5%-palladium/activated carbon 、 氢气 、 辛可尼丁 、 苄胺 作用下， 以 1,4-二氧六环 、 水 为溶剂， 23.0 ℃ 、101.33 kPa 条件下， 生成 (2R)-3-(2-methylphenyl)-2-phenylpropanoic acid 、 (2S)-3-(2-methylphenyl)-2-phenylpropanoic acid
  参考文献：
  名称：

  Structural requirements for substrate in highly enantioselective hydrogenation over the cinchonidine-modified Pd/C

  摘要：

  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.

  DOI：

  10.1016/j.jcat.2008.11.022
• 作为产物：
  描述：

  <2-Methyl-phenyl>-cyclopropenon 在 水 作用下， 以 乙腈 为溶剂， 生成 trans-2-<2-Methyl-phenyl>-3-phenyl-acrylsaeure 、 cis-2-Methyl-α-phenyl-zimtsaeure
  参考文献：
  名称：

  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

  摘要：

  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。

  DOI：

  10.1135/cccc19991594

文献信息

• 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.
• 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。