1-(2,5-dimethoxy-4-methylphenyl)-2-(pentamethylphenyl)ethane

• 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: 1-(2,5-dimethoxy-4-methylphenyl)-2-(pentamethylphenyl)ethane
• 英文别名: 1-[2-(2,5-Dimethoxy-4-methylphenyl)ethyl]-2,3,4,5,6-pentamethylbenzene
• 化学式: C₂₂H₃₀O₂
• 分子量: 326.479
• InChiKey: NBIFBAJNZYXTEX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.5
• 重原子数：
  24
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  2,3,4,5,6,-pentamethylbenzyl bromide 在 dimethyl sulfide borane 、 Orange CRET^+. 、 sodium hydride 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 51.58h， 生成 1-(2,5-dimethoxy-4-methylphenyl)-2-(pentamethylphenyl)ethane
  参考文献：
  名称：

  Efficient Hydrogenation of Sterically Hindered Olefins with Borane−Methyl Sulfide Complex

  摘要：

  Sterically hindered olefins are efficiently reduced to the corresponding alkanes by the borane-methyl sulfide (BMS) complex at room temperature (or below) in dichloromethane containing a mild one-electron oxidant (such as an aromatic cation radical) or by the passage of an anodic current. In an alternative procedure, the hydrogenation of the same (electron-rich) olefins with the EMS complex (in the absence of a one-electron oxidant) is also carried out-in the presence of a strong Bronsted acid (such as HBF4). In the oxidative activation, olefin cation radicals are the first observable intermediates, and separate experiments (including transient electrochemistry) confirm the facile reduction of the olefin cation radical by borane to produce the corresponding alkane. The direct protonation of olefins produces carbocationic intermediates which are also efficiently reduced by borane to the corresponding alkanes. The intermediacy of both olefin cation radicals and carbocations in the hydrogenation procedure with borane is discussed.

  DOI：

  10.1021/jo960357e

文献信息

• Efficient Hydrogenation of Sterically Hindered Olefins with Borane−Methyl Sulfide Complex
  作者：R. Rathore、U. Weigand、J. K. Kochi

  DOI：10.1021/jo960357e

  日期：1996.1.1

  Sterically hindered olefins are efficiently reduced to the corresponding alkanes by the borane-methyl sulfide (BMS) complex at room temperature (or below) in dichloromethane containing a mild one-electron oxidant (such as an aromatic cation radical) or by the passage of an anodic current. In an alternative procedure, the hydrogenation of the same (electron-rich) olefins with the EMS complex (in the absence of a one-electron oxidant) is also carried out-in the presence of a strong Bronsted acid (such as HBF4). In the oxidative activation, olefin cation radicals are the first observable intermediates, and separate experiments (including transient electrochemistry) confirm the facile reduction of the olefin cation radical by borane to produce the corresponding alkane. The direct protonation of olefins produces carbocationic intermediates which are also efficiently reduced by borane to the corresponding alkanes. The intermediacy of both olefin cation radicals and carbocations in the hydrogenation procedure with borane is discussed.