ethyl (E)-5,5-dimethyl-3-hexenoate | 103499-78-1

• 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: ethyl (E)-5,5-dimethyl-3-hexenoate
• 英文别名: ethyl (3E)-5,5-dimethyl-3-hexenoate；Ethyl-(3e)-5,5-dimethyl-3-hexenoate；ethyl (E)-5,5-dimethylhex-3-enoate
• CAS: 103499-78-1
• 化学式: C₁₀H₁₈O₂
• 分子量: 170.252
• InChiKey: NHISWROUFMFVJD-SOFGYWHQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  12
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.7
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  ethyl (E)-5,5-dimethyl-3-hexenoate 在 ABSA 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 乙腈 为溶剂， 反应 0.5h， 生成 (E)-2-Diazo-5,5-dimethyl-hex-3-enoic acid ethyl ester
  参考文献：
  名称：

  A Stereospecific Access to Allylic Systems Using Rhodium(II)−Vinyl Carbenoid Insertion into Si−H, O−H, and N−H Bonds

  摘要：

  Rhodium-catalyzed decomposition of alpha-vinyldiazoesters in the presence of silanes, alcohols, ethers, amines, and thiols have been shown to produce the corresponding alpha-silyl, alpha-hydroxy, alpha-alkoxy, alpha-amino, and alpha-thioalkoxy esters in generally good yield with a complete retention of the stereochemistry of the double bond of the diazo precursor. An extension of the process in homochiral series has also been devised using either a chiral auxiliary attached to the ester function or achiral alpha-vinyldiazoesters and Doyle's chiral catalyst Rh-2(MEPY)(4). In the former approach, pantolactone as chiral auxiliary gave diastereoselectivities of up to 70%, while the second approach produced the desired allylsilane with ee as high as 72%. On the other hand, Rh-2(MEPY)(4)-catalyzed insertion into the O-H bond of water led to poor or no enantioselectivity in good agreement with recent literature reports.

  DOI：

  10.1021/jo961952j
• 作为产物：
  描述：

  (E)-ethyl 5,5-dimethylhex-2-enoate 在 六甲基磷酰三胺 、 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 为溶剂， 反应 0.5h， 以47%的产率得到ethyl (E)-5,5-dimethyl-3-hexenoate
  参考文献：
  名称：

  (E)-α,β-不饱和酯转化为相应的β,γ-不饱和酯中的“合成效应”

  摘要：

  研究了在 HMPA 存在下用六甲基二硅叠氮化锂处理将 (E)-α,β-不饱和酯转化为相应的 β,γ-不饱和酯的立体化学。所得β,γ-不饱和酯的Z/E比率根据(E)-α,β-不饱和酯的γ-取代基而变化。这种现象被“合成效应”合理化，这可能主要归因于 σ→π* 相互作用和/或 6π-电子同芳香性。

  DOI：

  10.1246/cl.2003.778

文献信息

• “<i>Syn-Effect</i>” in the Conversion of (<i>E</i>)-α,β-Unsaturated Esters to the Corresponding β,γ-Unsaturated Esters
  作者：Samar Kumar Guha、Atsushi Shibayama、Daisuke Abe、Yutaka Ukaji、Katsuhiko Inomata

  DOI：10.1246/cl.2003.778

  日期：2003.8

  The stereochemistry in the conversion of (E)-α,β-unsaturated esters to the corresponding β,γ-unsaturated esters by treatment with lithium hexamethyldisilazide in the presence of HMPA was investigated. The Z/E ratios of the resulting β,γ-unsaturated esters varied according to the γ-substituents of the (E)-α,β-unsaturated esters. This phenomenon was rationalized by “syn-effect” which may be attributed

  研究了在 HMPA 存在下用六甲基二硅叠氮化锂处理将 (E)-α,β-不饱和酯转化为相应的 β,γ-不饱和酯的立体化学。所得β,γ-不饱和酯的Z/E比率根据(E)-α,β-不饱和酯的γ-取代基而变化。这种现象被“合成效应”合理化，这可能主要归因于 σ→π* 相互作用和/或 6π-电子同芳香性。
• Base-induced .alpha.-alkenylation of ethyl bromoacetate, phenacyl bromide and chloroacetonitrile via B-trans-1-alkenyl-9-borabicyclo[3.3.1]nonanes
  作者：Herbert C. Brown、Narayan G. Bhat、James B. Campbell

  DOI：10.1021/jo00367a039

  日期：1986.8
• BROWN H. C.; NARAYAN G. BHAT; CAMPBELL J. B., J. ORG. CHEM., 51,(1986) N 17, 3398-3400
  作者：BROWN H. C.、 NARAYAN G. BHAT、 CAMPBELL J. B.

  DOI：——

  日期：——
• A Stereospecific Access to Allylic Systems Using Rhodium(II)−Vinyl Carbenoid Insertion into Si−H, O−H, and N−H Bonds
  作者：Priyadarshanie Bulugahapitiya、Yannick Landais、Liliana Parra-Rapado、Denis Planchenault、Valéry Weber

  DOI：10.1021/jo961952j

  日期：1997.3.1

  Rhodium-catalyzed decomposition of alpha-vinyldiazoesters in the presence of silanes, alcohols, ethers, amines, and thiols have been shown to produce the corresponding alpha-silyl, alpha-hydroxy, alpha-alkoxy, alpha-amino, and alpha-thioalkoxy esters in generally good yield with a complete retention of the stereochemistry of the double bond of the diazo precursor. An extension of the process in homochiral series has also been devised using either a chiral auxiliary attached to the ester function or achiral alpha-vinyldiazoesters and Doyle's chiral catalyst Rh-2(MEPY)(4). In the former approach, pantolactone as chiral auxiliary gave diastereoselectivities of up to 70%, while the second approach produced the desired allylsilane with ee as high as 72%. On the other hand, Rh-2(MEPY)(4)-catalyzed insertion into the O-H bond of water led to poor or no enantioselectivity in good agreement with recent literature reports.
• “<i>Syn-Effect</i>” in the Conversion of (<i>E</i>)-α,β-Unsaturated Esters into the Corresponding β,γ-Unsaturated Esters and Aldehydes into Silyl Enol Ethers
  作者：Samar Kumar Guha、Atsushi Shibayama、Daisuke Abe、Maki Sakaguchi、Yutaka Ukaji、Katsuhiko Inomata

  DOI：10.1246/bcsj.77.2147

  日期：2004.12

  The stereochemistry in the conversion of (E)-α,β-unsaturated esters into the corresponding β,γ-unsaturated esters, and that in the conversion of aldehydes into the silyl enol ethers, were investigated. The Z/E ratios of the resulting β,γ-unsaturated esters and the silyl enol ethers varied according to the γ-substituents of the (E)-α,β-unsaturated esters and the α-substituents of the aldehydes, respectively

  研究了(E)-α,β-不饱和酯转化为相应的β,γ-不饱和酯以及醛转化为甲硅烷基烯醇醚的立体化学。所得β,γ-不饱和酯和甲硅烷基烯醇醚的Z/E比率分别根据(E)-α,β-不饱和酯的γ-取代基和醛的α-取代基而变化。这种现象被“syn-effect”合理化，这可能主要归因于 σ → π* 相互作用和/或 6π-电子同芳香性。