(E)-methyl 4-methylhexa-2,5-dienoate

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (E)-methyl 4-methylhexa-2,5-dienoate
• 英文别名: methyl (E)-4-methylhexa-2,5-dienoate；methyl (2E)-4-methylhexa-2,5-dienoate
• 化学式: C₈H₁₂O₂
• 分子量: 140.182
• InChiKey: NEHXTCFJBLOOFD-AATRIKPKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  10
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.38
• 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：

  山梨酸 在 盐酸 、 Hoveyda-Grubbs catalyst second generation 、 copper bromide dimethyl sulfide complex 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 反应 40.0h， 生成 (E)-methyl 4-methylhexa-2,5-dienoate
  参考文献：
  名称：

  一种新颖的催化不对称路线，向带有甲基取代的中心立体碳的跳过二烯。

  摘要：

  开发了一种高效的方法，该方法通过铜催化的二烯溴化物的不对称烯丙基烷基化反应，用甲基取代的中心立体碳对映选择性合成1,4-二烯（跳过的二烯）。在广泛的底物范围内，可实现出色的区域选择性和对映体选择性（高达SN2'/ SN2比为97：3，ee为99％）。

  DOI：

  10.1039/c3cc41021h

文献信息

• Ruthenium-Catalyzed Hydrovinylation of Dienoates: Model Studies Directed Toward the C10-C18 Segment of Ambruticin
  作者：Chae S. Yi、William A. Donaldson、Zhengjie He

  DOI：10.1055/s-2004-825605

  日期：——

  The ruthenium-catalyzed hydrovinylation of 2,4-dienoates 3 proceeds in a regioselective fashion to give 4-alkyl-2,5-dienoates 4 in good yields. Olefin cross-metathesis of a vinylcyclopropane with 4e demonstrates a synthetic route to the C10-C18 ­segment of ambruticin.

  钌催化的 2,4-二烯酸酯 3 的加氢乙烯基化反应以区域选择性的方式进行，从而以良好的收率得到 4-烷基-2,5-二烯酸酯 4。乙烯基环丙烷与 4e 的烯烃交叉甲基化反应展示了通向安络血 C10-C18 段的合成路线。
• Hydrovinylation of 1,3-Dienes:  A New Protocol, an Asymmetric Variation, and a Potential Solution to the Exocyclic Side Chain Stereochemistry Problem
  作者：Aibin Zhang、T. V. RajanBabu

  DOI：10.1021/ja0561338

  日期：2006.1.1

  Cyclic and acyclic 1,3-dienes undergo efficient (substrate/catalyst = 72) heterodimerization with ethylene in the presence of a Ni catalyst prepared from [o-(PhCH2O)]C6H4PPh2, [(allyl)2NiBr]2, and Na+ BAr4- (Ar = 3,5-bis-trifluromethylphenyl), giving 1,2-addition products. Yields up to 99% can be realized for several 1-vinylcycloalkenes and 1-substituted 1,3-butadienes. Phospholanes with suitably placed hemilabile ligating groups and phosphoramidites derived from binaphthol are excellent ligands for an asymmetric variation of this reaction, the latter giving 99% yield and >95% ee's for selected substrates. An example of how an exocyclic chiral center can be used to install other stereo-centers in the ring (e. g., the carbon to which the side chain is attached) is also provided. These discoveries open an expeditious entry into several biologically relevant classes of compounds, especially those carrying tetrahydronaphthalene and related heterocyclic moieties.
• A novel catalytic asymmetric route towards skipped dienes with a methyl-substituted central stereogenic carbon
  作者：Yange Huang、Martín Fañanás-Mastral、Adriaan J. Minnaard、Ben L. Feringa

  DOI：10.1039/c3cc41021h

  日期：——

  A highly efficient method for the enantioselective synthesis of 1,4-dienes (skipped dienes) with a methyl-substituted central stereogenic carbon using copper-catalysed asymmetric allylic alkylation of diene bromides was developed. Excellent regio- and enantioselectivity (up to 97 : 3 SN2'/SN2 ratio and 99% ee) were achieved with broad substrate scope.

  开发了一种高效的方法，该方法通过铜催化的二烯溴化物的不对称烯丙基烷基化反应，用甲基取代的中心立体碳对映选择性合成1,4-二烯（跳过的二烯）。在广泛的底物范围内，可实现出色的区域选择性和对映体选择性（高达SN2'/ SN2比为97：3，ee为99％）。