2-Acetoxy-4-methylbiphenyl | 135449-10-4

• 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-Acetoxy-4-methylbiphenyl
• 英文别名: 4-methylbiphenyl-2-yl acetate；(5-Methyl-2-phenylphenyl) acetate
• CAS: 135449-10-4
• 化学式: C₁₅H₁₄O₂
• 分子量: 226.275
• InChiKey: OCUAGRMLLQZMRN-UHFFFAOYSA-N

物化性质

• 沸点：
  349.9±21.0 °C(Predicted)
• 密度：
  1.084±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.13
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  ethyl (2E,4E)-2-methyl-5-phenylpenta-2,4-dienoate 在 bis-triphenylphosphine-palladium(II) chloride lithium aluminium tetrahydride 、 三乙胺 作用下， 以 乙醚 、 苯 为溶剂， 25.0~140.0 ℃ 、5.07 MPa 条件下， 反应 3.0h， 生成 2-Acetoxy-4-methylbiphenyl
  参考文献：
  名称：

  Novel synthesis of phenol derivatives by palladium-catalyzed cyclocarbonylation of 2,4-pentadienyl acetates

  摘要：

  Phenyl acetates were selectively obtained in good yields by cyclocarbonylation of 2,4-pentadienyl acetates in the presence of NEt3, Ac2O, and a catalytic amount of palladium complexes such as PdCl2(PPh3)2 at 120-140-degrees-C under 50 atm of CO. No five-membered ring products were observed. A platinum complex PtCl2(PPh3)2 was also effective as a catalyst. The reaction of 5-phenyl-2,4-pentadienyl bromide with M(CO)(PPh3)3 (M = Pd or Pt) under CO gave the corresponding 6-phenyl-3, 5-hexadienoyl complexes in a high yield, which in turn afforded 2-acetoxybiphenyl in 41-51% yield on heating to 160-degrees-C under 50 atm of CO in the presence of NEt3 and Ac2O. Similar 3,5-hexadienoyl complexes are proposed to be intermediates in the catalytic cyclocarbonylation of 2,4-pentadienyl acetates. On the other hand, PdCl2(PPh3)2-catalyzed carbonylation of o-(bromomethyl)(1-alkenyl)-benzenes in the presence of NEt3 and Ac2O gave 2-naphthyl acetates in moderate yields, while the reaction in the absence of Ac2O gave five-membered ring products such as 2-indanones or a tricyclic lactone by incorporation of one or two CO molecules, respectively.

  DOI：

  10.1021/jo00076a051

文献信息

• Pd(II)-Catalyzed C−H Activation/Aryl−Aryl Coupling of Phenol Esters
  作者：Bin Xiao、Yao Fu、Jun Xu、Tian-Jun Gong、Jian-Jun Dai、Jun Yi、Lei Liu

  DOI：10.1021/ja909818n

  日期：2010.1.20

  reactions have been well-known, Pd(II) insertion into C-H bonds promoted by coordination of an oxygen-only group to the palladium remains rather rare. In the present study, the first cyclopalladation complex formed from a simple phenol ester was characterized by X-ray crystallography. A promising protocol for the ortho C-H activation/aryl-aryl coupling of phenol esters that was not sensitive to moisture

  尽管含氮基团导向的环钯化反应已广为人知，但通过仅含氧的基团与钯的配位促进 Pd(II) 插入 CH 键的情况仍然相当罕见。在本研究中，第一个由简单苯酚酯形成的环钯化配合物通过 X 射线晶体学表征。然后建立了对水分或空气不敏感的苯酚酯邻位 CH 活化/芳基-芳基偶联的有前途的方案。该反应的效用已被证明可用于合成有用的苯酚衍生物。
• Novel synthesis of phenol derivatives by palladium-catalysed cyclocarbonylation of penta-2,4-dienyl acetates
  作者：Youichi Ishii、Chao Gao、Masakazu Iwasaki、Masanobu Hidai

  DOI：10.1039/c39910000695

  日期：——

  Palladium-catalysed Cyclocarbonylation of penta-2,4-dienyl acetates in the presence of NEt3 and Ac2O selectively gives phenyl acetates in good yields.

  在 NEt3 和 Ac2O 存在下，钯催化的戊-2,4-二烯乙酸酯环羰基化反应可选择性地生成苯基乙酸酯，且收率高。