(2E,4E)-8-iodoocta-2,4-diene | 143903-04-2

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 有机碘化物
• 英文名称: (2E,4E)-8-iodoocta-2,4-diene
• 英文别名: 1-iodoocta-4(E),6(E)-diene；8-iodo-2(E),4(E)-octadiene
• CAS: 143903-04-2
• 化学式: C₈H₁₃I
• 分子量: 236.096
• InChiKey: WYDQXOXNHMCLHC-MQQKCMAXSA-N

物化性质

• 沸点：
  214.6±19.0 °C(Predicted)
• 密度：
  1.416±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  9
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  (2E,4E)-8-iodoocta-2,4-diene 在 正丁基锂 、 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 2.5h， 生成 3-(octa-4(E),6(E)-dienyl)-2-oxopiperidine-1-carboxylic acid [2-(trimethylsilyl)ethyl] ester
  参考文献：
  名称：

  Construction of Carbocyclic Arrays Containing Nitrogen via Intramolecular Imino Diels−Alder Reactions in Polar Media. A Comparative Study:  5.0 M Lithium Perchlorate−Diethyl Ether versus Water

  摘要：

  The intramolecular Diels-Alder reaction of iminium ions has been examined in polar media such as 5.0 M lithium perchlorate-diethyl ether and water. Cycloaddition of 3 in 5.0 M, lithium perchlorate-diethyl ether containing 10 mol % camphorsulfonic acid proceeds, not by in situ generation of iminium ion 1, but rather via N-(acyloxy)iminium ion 7 which subsequently cyclizes to tricyclic compounds 4 and 5. Direct formation of imines 15 and 30 was realized by reduction of the corresponding lactams (13 and 29, respectively) followed by exposure to 2.0 equiv of tetra-n-butylammonium fluoride. Exposure of the trifluoroacetic acid salt 18 of imine 15 to 5.0 M lithium perchlorate-diethyl ether at ambient temperature gave rise to tricyclic amine 16 in which the diene underwent isomerization prior to [4+2] cycloaddition. In contrast, use of water provided tricyclic amine 19. Similarly, exposure of iminium salt 31 to water afforded tricyclic amine 32. The polar sovent of choice for intramolecular imino Diels-Alder reactions employing substrates such as 18 and 31 is water.

  DOI：

  10.1021/jo9905930
• 作为产物：
  描述：

  (E)-5-chloro-1-iodo-1-pentene 在 二异丁基氢化铝 、 sodium thiosulfate 、 sodium iodide 作用下， 以 正己烷 、 丙酮 为溶剂， 反应 92.0h， 生成 (2E,4E)-8-iodoocta-2,4-diene
  参考文献：
  名称：

  分子内离子 Diels-Alder 反应中的远程不对称诱导：在 (+)-Dihydrocompactin 全合成中的应用

  摘要：

  描述了 (+)-dihydrocompactin 通过分子内离子 Diels-Alder 反应进行远程立体控制的全合成。该反应通过中间体乙烯基氧碳鎓离子 (6) 进行，其构象限制导致观察到的不对称诱导。不对称感应的感觉是对比的，并且可以通过图 1 中所示的拟议反应构象来解释。

  DOI：

  10.1021/ja043506g

文献信息

• Ru-Based Catechothiolate Complexes Bearing an Unsaturated NHC Ligand: Effective Cross-Metathesis Catalysts for Synthesis of (<i>Z</i>)-α,β-Unsaturated Esters, Carboxylic Acids, and Primary, Secondary, and Weinreb Amides
  作者：Zhenxing Liu、Chaofan Xu、Juan del Pozo、Sebastian Torker、Amir H. Hoveyda

  DOI：10.1021/jacs.9b02318

  日期：2019.5.1

  compounds is illustrated through two representative applications: an eight-step, 15% overall yield, and completely Z-selective route leading to an intermediate that may be used in synthesis of stagonolide E (vs 11 steps, 4% overall yield and 91% Z, previously), and a five-step, 25% overall yield sequence to access a precursor to dihydrocompactin (vs 13 steps and 5% overall yield, formerly).

  尽管取得了显着进展，但用于制备 (Z)-α,β-不饱和羰基化合物的烯烃复分解方法仍然很少，适用于合成多种生物活性分子。特别需要的是可以由基于钌的催化剂促进的转化，因为这样的实体将允许直接获得羧酸酯和酰胺或酸（与基于钼或钨的亚烷基相反）。在这里，我们详细介绍了如何根据通过计算和实验研究获得的机理洞察，发现一种易于获得的儿茶酚硫合钌配合物，该配合物可用于生成许多 α,β-不饱和羰基化合物，产率高达 81%，≥98： 2 Z/E 比率。我们首次证明，通过使用带有不饱和 N-杂环卡宾 (NHC) 配体的复合物，源自缺电子性更强的酯、酸和 Weinreb 酰胺（相对于伯酰胺或仲酰胺）的产物可以高效合成并具有高度立体化学控制。通过两个代表性应用说明了合成生物活性化合物的新进展的重要性：八步、15% 的总产率和完全 Z 选择性路线，导致可用于合成 stagonolide E 的中间体（vs 11步骤，4%
• Preparation of polyfunctional nitro olefins and nitroalkanes using the copper-zinc reagents RCu(CN)ZnI
  作者：Carole Jubert、Paul Knochel

  DOI：10.1021/jo00046a027

  日期：1992.9

  The addition of the copper-zinc reagents RCu(CN)ZnX to a variety of nitro olefins produces polyfunctional nitroalkanes in high yields. The intermediate zinc or copper nitronates can be directly submitted to a Nef reaction (O3,-78-degrees-C) and converted to polyfunctional ketones in a one-pot procedure. The addition of RCu(CN)ZnX to nitro olefins bearing a leaving group (RSO2, RS) in the beta-position provides pure (E)-nitro olefins in excellent yields. The reaction has been applied for the stereoselective preparation of 1,3-nitrodienes and for a Diels-Alder reaction precursor.
• Remote Asymmetric Induction in an Intramolecular Ionic Diels−Alder Reaction:  Application to the Total Synthesis of (+)-Dihydrocompactin
  作者：Tarek Sammakia、Deidre M. Johns、Ganghyeok Kim、Martin A. Berliner

  DOI：10.1021/ja043506g

  日期：2005.5.1

  The total synthesis of (+)-dihydrocompactin via an intramolecular ionic Diels-Alder reaction that proceeds with remote stereocontrol is described. This reaction proceeds by an intermediate vinyl-oxocarbenium ion (6), the conformational constraints of which lead to the observed asymmetric induction. The sense of asymmetric induction appears contrasteric and is explained by the proposed reactive conformation

  描述了 (+)-dihydrocompactin 通过分子内离子 Diels-Alder 反应进行远程立体控制的全合成。该反应通过中间体乙烯基氧碳鎓离子 (6) 进行，其构象限制导致观察到的不对称诱导。不对称感应的感觉是对比的，并且可以通过图 1 中所示的拟议反应构象来解释。
• Construction of Carbocyclic Arrays Containing Nitrogen via Intramolecular Imino Diels−Alder Reactions in Polar Media. A Comparative Study:  5.0 M Lithium Perchlorate−Diethyl Ether versus Water
  作者：Paul A. Grieco、Michael D. Kaufman

  DOI：10.1021/jo9905930

  日期：1999.8.1

  The intramolecular Diels-Alder reaction of iminium ions has been examined in polar media such as 5.0 M lithium perchlorate-diethyl ether and water. Cycloaddition of 3 in 5.0 M, lithium perchlorate-diethyl ether containing 10 mol % camphorsulfonic acid proceeds, not by in situ generation of iminium ion 1, but rather via N-(acyloxy)iminium ion 7 which subsequently cyclizes to tricyclic compounds 4 and 5. Direct formation of imines 15 and 30 was realized by reduction of the corresponding lactams (13 and 29, respectively) followed by exposure to 2.0 equiv of tetra-n-butylammonium fluoride. Exposure of the trifluoroacetic acid salt 18 of imine 15 to 5.0 M lithium perchlorate-diethyl ether at ambient temperature gave rise to tricyclic amine 16 in which the diene underwent isomerization prior to [4+2] cycloaddition. In contrast, use of water provided tricyclic amine 19. Similarly, exposure of iminium salt 31 to water afforded tricyclic amine 32. The polar sovent of choice for intramolecular imino Diels-Alder reactions employing substrates such as 18 and 31 is water.