(1,1,4-trimethyl-hex-2-enyl)-benzene

• 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: (1,1,4-trimethyl-hex-2-enyl)-benzene
• 英文别名: [(E)-2,5-dimethylhept-3-en-2-yl]benzene
• 化学式: C₁₅H₂₂
• 分子量: 202.34
• InChiKey: SSFSAOYAWQTRFX-VAWYXSNFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.4
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  3-甲基-1-戊烯 、 alkaline earth salt of/the/ methylsulfuric acid 以 氘代苯 为溶剂， 反应 0.5h， 生成 (1,1,4-trimethyl-hex-2-enyl)-benzene 、 3,6-dimethyl-oct-4-ene 、 1,1-二甲基-2-丙烯基苯
  参考文献：
  名称：

  Understanding the effect of allylic methyls in olefin cross-metathesis

  摘要：

  A series of NMR spectroscopy experiments have been conducted with both the model compound, 3-methyl-1-pentene and the corresponding ADMET monomer 3,6,9-trimethylundeca-1,10-diene (11) to better understand the effect of allylic methyls during olefin metathesis chemistry. Traditional ADMET catalysts such as Schrock's molybdenum (1), and Grubbs' ruthenium 1st and 2nd generation (2 and 3) were examined under cross-metathesis and ADMET conditions. Regardless of catalyst selection, 50% or less metathesis conversion was observed for all reactions, especially in the case of the more sterically encumbered diene. With Schrock's molybdenum catalyst 1, the reaction leads to an accumulation of the non-productive metallacyclobutane, trapping the catalyst in an inactive form. With Grubbs' ruthenium catalysts 2 and 3, the substrate coordinates to the metal center primarily to yield non-productive metathesis, which results in a build-up of the methylidene complex leading to catalyst decomposition. These results are directly correlated to the orientation of the substrate's bulk during the metallacyclobutane formation, the alkyl branch being adjacent to the metal center in the case of the molybdenum catalyst 1, and opposite to it in the case of ruthenium catalyst 2 and 3. (c) 2005 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2005.09.030

文献信息

• Understanding the effect of allylic methyls in olefin cross-metathesis
  作者：Florence C. Courchay、Travis W. Baughman、Kenneth B. Wagener

  DOI：10.1016/j.jorganchem.2005.09.030

  日期：2006.2

  A series of NMR spectroscopy experiments have been conducted with both the model compound, 3-methyl-1-pentene and the corresponding ADMET monomer 3,6,9-trimethylundeca-1,10-diene (11) to better understand the effect of allylic methyls during olefin metathesis chemistry. Traditional ADMET catalysts such as Schrock's molybdenum (1), and Grubbs' ruthenium 1st and 2nd generation (2 and 3) were examined under cross-metathesis and ADMET conditions. Regardless of catalyst selection, 50% or less metathesis conversion was observed for all reactions, especially in the case of the more sterically encumbered diene. With Schrock's molybdenum catalyst 1, the reaction leads to an accumulation of the non-productive metallacyclobutane, trapping the catalyst in an inactive form. With Grubbs' ruthenium catalysts 2 and 3, the substrate coordinates to the metal center primarily to yield non-productive metathesis, which results in a build-up of the methylidene complex leading to catalyst decomposition. These results are directly correlated to the orientation of the substrate's bulk during the metallacyclobutane formation, the alkyl branch being adjacent to the metal center in the case of the molybdenum catalyst 1, and opposite to it in the case of ruthenium catalyst 2 and 3. (c) 2005 Elsevier B.V. All rights reserved.