3,5-dimethyl-hepta-2,5-dien-4-one | 60973-24-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3,5-dimethyl-hepta-2,5-dien-4-one
• 英文别名: 3,5-Dimethylhepta-2,5-dien-4-one
• CAS: 60973-24-2
• 化学式: C₉H₁₄O
• 分子量: 138.21
• InChiKey: PPVLMJVBICPFRZ-UHFFFAOYSA-N

物化性质

• 沸点：
  198.5±9.0 °C(Predicted)
• 密度：
  0.858±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  10
• 可旋转键数：
  2
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  3,5-dimethyl-hepta-2,5-dien-4-one 在 甲酸 、 磷酸 作用下， 反应 2.0h， 生成 1,2,3,4,5-五甲基环戊二烯
  参考文献：
  名称：

  Communications- Preparation of 1,2,3,4,5-Pentamethyl-cyclopentadiene, 1,2,3,4,5,5-Hexamethyl-cyclopentadiene, and 1,2,3,4,5-Pentamethyl-cyclopentadienylcarbinol

  摘要：

  DOI：

  10.1021/jo01080a623
• 作为产物：
  描述：

  Di-sec.-2-butenyl-carbinol 在 manganese(IV) oxide 作用下， 以 正戊烷 为溶剂， 生成 3,5-dimethyl-hepta-2,5-dien-4-one
  参考文献：
  名称：

  Communications- Preparation of 1,2,3,4,5-Pentamethyl-cyclopentadiene, 1,2,3,4,5,5-Hexamethyl-cyclopentadiene, and 1,2,3,4,5-Pentamethyl-cyclopentadienylcarbinol

  摘要：

  DOI：

  10.1021/jo01080a623

文献信息

• Olefination of α,α′-Divinyl Ketones through Catalytic Meyer−Schuster Rearrangement
  作者：Curtis J. Rieder、Karl J. Winberg、F. G. West

  DOI：10.1021/jo101497f

  日期：2011.1.7

  followed by catalytic Meyer−Schuster rearrangement has been developed for the olefination of 1,4-pentadien-3-ones to afford [3]dendralenes. Many of the traditional methods for the Meyer−Schuster rearrangement of alkynyl carbinols are not suitable with these highly unsaturated substrates because of their acid sensitivity. Unexpected reactivity during attempted rearrangement, including Nazarov-type electrocyclizations

  1,4-二烯-3-酮的直接烯烃化仍然是一个合成难题。已经开发出了两步方案，采用乙炔加成，然后进行催化的Meyer-Schuster重排，以实现1,4-戊二烯-3-酮的烯化反应，从而制得[3]树枝状烯烃。炔基甲醇的迈耶-舒斯特重排的许多传统方法由于其对酸的敏感性而不适用于这些高度不饱和的底物。提出了包括Nazarov型电环化在内的尝试重排过程中的意外反应性，以及利用催化VO（acac）2促进乙氧基乙炔加合物的Meyer-Schuster重排的条件。
• Site‐ and Enantioselective Iridium‐Catalyzed Desymmetric Mono‐Hydrogenation of 1,4‐Dienes
  作者：Haibo Wu、Hao Su、Erik J. Schulze、Bram B. C. Peters、Mark D. Nolan、Jianping Yang、Thishana Singh、Mårten S. G. Ahlquist、Pher G. Andersson

  DOI：10.1002/anie.202107267

  日期：2021.8.23

  The control of site selectivity in asymmetric mono-hydrogenation of dienes or polyenes remains largely underdeveloped. Herein, we present a highly efficient desymmetrization of 1,4-dienes via iridium-catalyzed site- and enantioselective hydrogenation. This methodology demonstrates the first iridium-catalyzed hydrogenative desymmetriation of meso dienes and provides a concise approach to the installation

  二烯或多烯不对称单氢化中位点选择性的控制在很大程度上仍然不发达。在此，我们提出了一种通过铱催化的位点和对映选择性氢化对 1,4-二烯进行高效去对称化的方法。该方法展示了第一个铱催化的内消旋二烯的氢化去对称作用，并提供了一种在烯烃附近安装两个邻位立构中心的简明方法。一系列二乙烯基甲醇和二乙烯基碳酰胺底物获得了高分离产率（高达 96%）和优异的非对映选择性和对映选择性（高达 99:1 dr 和 99% ee）。DFT 计算表明，羟基氧和反应氢化物之间的相互作用是二乙烯基甲醇去对称化的立体选择性的原因。根据计算的能量分布，应用模拟产品随时间分布的模型来显示该过程的直观动力学。通过天然产物萨拉戈酸A和(+)-invictolide的关键中间体的合成证明了该方法的有效性。
• Enzymelike Catalysis of the Nazarov Cyclization by Supramolecular Encapsulation
  作者：Courtney J. Hastings、Michael D. Pluth、Robert G. Bergman、Kenneth N. Raymond

  DOI：10.1021/ja102633e

  日期：2010.5.26

  The water-soluble, self-assembled, tetrahedral assembly K12Ga4L6 (L = 1,5-biscatecholamidenaphthalene) catalyzes the Nazarov cyclization of 1,3-pentadienols with extremely high levels of efficiency. The catalyzed reaction proceeds over a million times faster than the background reaction, an increase comparable to those observed in some enzymatic systems. This catalysis operates under aqueous conditions at mild temperatures and pH, and the reaction is halted by the addition of an appropriate inhibitor. This unprecedented rate enhancement is attributed to both the stabilization of protonated reaction intermediates and the effect of constrictive binding on the bound guest.
• Homologous Mukaiyama Reactions via Trapping of the Nazarov Intermediate with Silyloxyalkenes
  作者：Yen-Ku Wu、Robert McDonald、F. G. West

  DOI：10.1021/ol201125h

  日期：2011.7.15

  Treatment of 1,4-pentadien-3-ones and silyloxyalkenes with BF3 center dot OEt2 at room temperature or lower initiates a domino process consisting of sequential 4 pi electrocyclization and capture of the resulting cyclopentenyl cation by the electron-rich trap. The overall process furnishes 1,4-dicarbonyl products containing highly substituted cyclopentanones in good yields and with the establishment of up to five new stereocenters.
• Rieder, Curtis J.; Winberg, Karl J.; West, F. G., Journal of the American Chemical Society, 2009, vol. 131, p. 7504 - 7505
  作者：Rieder, Curtis J.、Winberg, Karl J.、West, F. G.

  DOI：——

  日期：——