ethyl 2-(4-ethoxy-4-oxobutyl)benzoate

• 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: ethyl 2-(4-ethoxy-4-oxobutyl)benzoate
• 英文别名: 2-(3-ethoxycarbonyl-propyl)-benzoic acid ethyl ester；2-(3-Aethoxycarbonyl-propyl)-benzoesaeure-aethylester；4-(2-Aethoxycarbonyl-phenyl)-buttersaeure-aethylester；Ethyl 2-(4-ethoxy-4-oxobutyl)benzoate
• 化学式: C₁₅H₂₀O₄
• 分子量: 264.321
• InChiKey: SHBXZXLYZRKXIX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  19
• 可旋转键数：
  9
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2-碘苯甲酸乙酯, 、 bromo(4-ethoxy-4-oxobutyl)zinc 在 双(乙腈)氯化钯(II) (E)-3-(2-(diphenylphosphino)phenyl)-1-phenylprop-2-en-1-one 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以86%的产率得到ethyl 2-(4-ethoxy-4-oxobutyl)benzoate
  参考文献：
  名称：

  Superior Effect of a π-Acceptor Ligand (Phosphine−Electron-Deficient Olefin Ligand) in the Negishi Coupling Involving Alkylzinc Reagents

  摘要：

  [GRAPHICS]Palladium-catalyzed Negishi cross-coupling involving primary and secondary alkyls, even in the presence of beta-H, can be achieved at ambient temperature using chelating ligands containing a phospline and an electron-deficient olefin. The superior effects of the ligands were shown not only in the desired cross-coupling product yields but also in the fast reaction at mild conditions. This reaction has been also scaled up to 50 g in 0.005 mol % catalyst (20,000 TONs) at room temperature.

  DOI：

  10.1021/ol701995t

文献信息

• An Electron-Deficient Diene as Ligand for Palladium-Catalyzed Cross-Coupling Reactions: An Efficient Alkylation of Aryl Iodides by Primary and Secondary Alkylzinc Reagents
  作者：Qiang Liu、Hui Duan、Xiancai Luo、Yang Tang、Gang Li、Rong Huang、Aiwen Lei

  DOI：10.1002/adsc.200800118

  日期：2008.6.9

  An electron-deficient diene, L1, was found to be an effective ligand in facilitating palladium-catalyzed Negishi couplings involving primary and secondary alkylzinc reagents. The reactions took place readily at 60 °C in THF with 5 mol% of a catalyst generated in situ from bis(acetonitrile)palladium dichloride [PdCl2(MeCN)2] and L1, and functional groups such as chloro, bromo, etc. attached to phenyl

  发现缺电子的二烯L 1是促进钯催化的涉及伯烷基锌试剂和仲烷基锌试剂的Negishi偶联的有效配体。反应在60°C的THF中与5 mol％的由双（乙腈）二氯化钯[PdCl 2（MeCN）2 ]和L 1原位生成的催化剂轻松进行，并且对与苯环相连的氯，溴等官能团以及与反应位点相邻的β-H原子具有良好的耐受性。当单独使用异丙基氯化锌作为亲核试剂时，在我们的系统中也观察到了文献报道的反应中涉及的仲烷基锌试剂中存在问题的异构化。然而，当在L 1存在下使用i- Pr 2 Zn时，异构化被显着抑制。
• Superior Effect of a π-Acceptor Ligand (Phosphine−Electron-Deficient Olefin Ligand) in the Negishi Coupling Involving Alkylzinc Reagents
  作者：Xiancai Luo、Heng Zhang、Hui Duan、Qiang Liu、Lizheng Zhu、Tony Zhang、Aiwen Lei

  DOI：10.1021/ol701995t

  日期：2007.10.1

  [GRAPHICS]Palladium-catalyzed Negishi cross-coupling involving primary and secondary alkyls, even in the presence of beta-H, can be achieved at ambient temperature using chelating ligands containing a phospline and an electron-deficient olefin. The superior effects of the ligands were shown not only in the desired cross-coupling product yields but also in the fast reaction at mild conditions. This reaction has been also scaled up to 50 g in 0.005 mol % catalyst (20,000 TONs) at room temperature.