ethyl 3,6-dimethylhept-2-enoate | 83583-16-8

• 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 3,6-dimethylhept-2-enoate
• 英文别名: ethyl (2E)-3,6-dimethylhept-2-enoate；ethyl (E)-3,6-dimethylhept-2-enoate
• CAS: 83583-16-8
• 化学式: C₁₁H₂₀O₂
• 分子量: 184.279
• InChiKey: HHMYHNBAFKQSOQ-CSKARUKUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.93
• 重原子数：
  13.0
• 可旋转键数：
  5.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  ethyl 3,6-dimethylhept-2-enoate 在 lithium aluminium tetrahydride 作用下， 生成 (E)-3,6-dimethylhept-2-en-1-ol
  参考文献：
  名称：

  Suryawanshi, S N; Rani, A; Bhakuni, D S, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1991, vol. 30, # 12, p. 1089 - 1094

  摘要：

  DOI：
• 作为产物：
  描述：

  2-异丁基乙酰乙酸乙酯 在 sodium hydroxide 、 sodium hydride 作用下， 以 乙醇 为溶剂， 生成 ethyl 3,6-dimethylhept-2-enoate
  参考文献：
  名称：

  Suryawanshi, S N; Rani, A; Bhakuni, D S, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1991, vol. 30, # 12, p. 1089 - 1094

  摘要：

  DOI：

文献信息

• Tuning the Reactivity of Functionalized Diallylic Alcohols: Brønsted versus Lewis Acid Catalysis
  作者：Luisa Lempenauer、Elisabet Duñach、Gilles Lemière

  DOI：10.1002/chem.201702601

  日期：2017.8

  diallylic alcohols in acidic medium is disclosed, highlighting the difference between strong Lewis acid and mild Brønsted acid catalysis. In the presence of bismuth(III) triflate, allylic alcohol activation affords diversely substituted cyclopentenones in a Nazarov-type electrocyclization, whereas activation of the thioenol ether by p-toluenesulfonic acid provides an entry to α-sulfenylated β,γ-unsaturated

  公开了在酸性介质中双官能的含烯醇硫醚的二烯丙基醇的化学发散反应性，突出了强路易斯酸和温和布朗斯台德酸催化之间的区别。在三氟甲磺酸铋（III）的存在下，烯丙醇的活化在Nazarov型电环化中提供了不同取代的环戊烯酮，而对甲苯磺酸对硫烯醇醚的活化则为α-亚磺酰基化的β，γ-不饱和酮提供了入口。两种方法都表示使用便宜且无毒的催化系统，可以在温和条件下轻松获得相应的产品。
• Pheromone study on acarid mites. Part IX. Syntheses of alarm pheromone analogues of the mold mite, Tyrophagus putrescentiae, and their biological activities.
  作者：Yasumasa KUWAHARA、Lica SAKUMA

  DOI：10.1271/bbb1961.46.1855

  日期：——

  Against the mold mite, Tyrophagus putrescentiae, 3, 7-dimethyl-(Z)-2-octenyl formate (II) is the most active compound as an alarm pheromone besides the natural pheromone, neryl formate (I), and this activity is equal to I (1-10ppm). In order to elucidate the structural requisites for inducing alarm pheromone activity, a total of 16 analogues of I were prepared by modifying the structure of II. For preparation of 3-methyl- and 3-ethyl-(Z)-2-alkenyl formates, the Wittig reaction of ethoxy- or methoxy-carbonylmethylene triphenyl phosphorane with 2-alkanone or 3-alkanone was used. The reaction with 2-alkanone gave a mixture of (Z)-2-alkenoate (ca. 40%) and (E)-2-alkenoate (ca. 60%) in an average 60% yield. The reaction with 3-alkanone gave a mixture of (Z)-2-alkenoate (56%) and (E)-2-alkenonate (44%). Alarm pheromone activities were demonstrated on 14 compounds of (Z)-2-alkenyl formates. The presence of the (Z)-allylic primary alcohol formate moiety in a molecule was clarified as the key to induce pheromone activity, and no necessity for an acyclic monoterpene carbon skeleton was demonstrated.

  针对霉菌螨（Tyrophagus putrescentiae），3, 7-二甲基-(Z)-2-辛烯酸甲酯（II）是除了天然信息素（奈尔酸甲酯 I）外，作为警报信息素最活跃的化合物，其活性与 I 相当（1-10ppm）。为了阐明诱导警报信息素活性的结构要求，制备了16个 I 的类似物，通过改造 II 的结构。为制备3-甲基和3-乙基-(Z)-2-烯酸甲酯，采用了乙氧基或甲氧基碳酰基甲烯三苯基膦与2-烷酮或3-烷酮的威蒂格反应。与2-烷酮的反应产生了约40%的(Z)-2-烯酸酯和约60%的(E)-2-烯酸酯，平均产率为60%。与3-烷酮的反应则得到了56%的(Z)-2-烯酸酯和44%的(E)-2-烯酸酯。在14种(Z)-2-烯酸甲酯化合物中展示了警报信息素活性。研究表明，分子中存在(Z)-烯丙基初级醇酸甲酯基团是诱导信息素活性的关键，且不需要非环状单萜碳骨架。
• Synthetic Method to Form 2,2′-Bis(naphthoquinone) Compounds
  作者：Vishwajeet Jha、Navneet Goyal、Cheryl K. Stevens、Edwin Stevens、Jayalakshmi Sridhar

  DOI：10.1021/acs.joc.7b02501

  日期：2017.12.15

  We have discovered a transition-metal-free approach to the synthesis of 2,2′-bis(naphthoquinones) using a Diels–Alder reaction of conjugated ketene silyl acetals with benzoquinone. Its monomer analogue can also be synthesized by simply increasing the equivalents of benzoquinone.

  我们发现，使用共轭乙烯酮甲硅烷基缩醛与苯醌的Diels-Alder反应，可以使用无过渡金属的方法合成2,2'-双（萘醌）。它的单体类似物也可以通过简单地增加苯醌的当量来合成。
• Synthesis of α-oxygenated β,γ-unsaturated ketones by a catalytic rearrangement strategy
  作者：Luisa Lempenauer、Aline Soupart、Elisabet Duñach、Gilles Lemière

  DOI：10.1039/c8ob01559g

  日期：——

  A straightforward two-step entry to α-oxgenated β,γ-unsaturated ketones from readily available α,β-unsaturated ketones is disclosed. It was found that bis(allylic) alcohols undergo a skeletal rearrangement in the presence of 1 mol% of cheap and non-corrosive p-toluenesulfonic acid. Computational studies were conducted to support the mechanism and to rationalise the influence of the catalyst acidity

  公开了从容易获得的α，β-不饱和酮直接进入α-加氧的β，γ-不饱和酮的两步法。发现双（烯丙基）醇在1mol％的廉价且无腐蚀性的对甲苯磺酸的存在下发生骨架重排。进行了计算研究以支持该机理并合理化催化剂酸度对产物选择性的影响。
• Enantioselective Epoxidation of β,β-Disubstituted Enamides with a Manganese Catalyst and Aqueous Hydrogen Peroxide
  作者：Carlota Clarasó、Laia Vicens、Alfonso Polo、Miquel Costas

  DOI：10.1021/acs.orglett.9b00729

  日期：2019.4.5

  Enantioselective epoxidation of β,β-disubstituted enamides with aqueous hydrogen peroxide and a novel manganese catalyst is described. Epoxidation is stereospecific and proceeds fast under mild conditions. Amides are disclosed as key functional groups to enable high enantioselectivity.

  描述了用过氧化氢水溶液和新型锰催化剂对β，β-二取代的酰胺进行对映选择性环氧化。环氧化是立体定向的，在温和条件下快速进行。酰胺被公开为实现高对映选择性的关键官能团。