Ethyl 3-methyl-4-oxo-2-heptenoate

• 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-methyl-4-oxo-2-heptenoate
• 英文别名: ethyl 3-methyl-4-oxohept-2-enoate
• 化学式: C₁₀H₁₆O₃
• 分子量: 184.235
• InChiKey: KIBGLIWLACXMIO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.86
• 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：
  0.6
• 拓扑面积：
  43.37
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  Ethyl 3-methyl-4-oxo-2-heptenoate 在 葡萄糖 、 GDH 、 NADP+ 、 nicotinamide dependent 2-cyclohexen-1-one reductase from Zymomonas mobilis 作用下， 以 aq. phosphate buffer 为溶剂， 以25%的产率得到(R)-ethyl 3-methyl-4-oxoheptanoate
  参考文献：
  名称：

  基于γ-丁内酯的香精的对映选择性催化一锅合成

  摘要：

  本文描述了各种烷基取代的γ-丁内酯香料1的制备（1 g规模）的立体选择性合成。以Horner-Wadsworth-Emmons反应合成作为原料的α，β-不饱和γ-酮酸酯2，并通过单罐酶级联反应中的烯还原酶和醇脱氢酶进一步将其还原为九种所需的γ-丁内酯1，其中威士忌（1 c）和白兰地内酯（1 d）。产品1以中等至良好的收率和非常好的非对映选择性获得了C。此外，对n Bu取代基的位置进行了置换，以研究其对酶级联反应的影响。

  DOI：

  10.1002/cctc.201801040
• 作为产物：
  描述：

  4-己炔-3-醇 、 2-Chloro-2-ethoxyvinyl 4-chlorophenyl sulfoxide 在 甲基锂 作用下， 生成 Ethyl 3-methyl-4-oxo-2-heptenoate
  参考文献：
  名称：

  One-flask, consecutive [3,3]- and [2,3]-sigmatropic rearrangements for conversions of propargylic alcohols into 2-carbon-extended 4-oxo-2-alkenoate esters. Use of a new 1-chloro-1-ethoxy-2-sulfinylethylene

  摘要：

  Seven differently substituted primary and secondary propargylic alcohols are shown to react with (arylsulfinyl) vinylic chloride 1a at 100-degrees-C for 1 h sequentially via a [3,3] sigmatropic rearrangement and then a [2,3] sigmatropic rearrangement to form 4-oxo-2-alkenoates 8a-8e and 9a and 9b in 52-80% yields. This one-flask, intramolecular carbon-carbon bond-forming process represents a simple and convenient method not only for regiospecific gamma-attachment onto a propargylic alcohol of a two-carbon (ethoxycarbonyl)methylene unit but also for alpha --> beta transposition of oxygen. The synthetic utility of this procedure is illustrated further by eqs 2 and 3 for preparation of regiospecifically functionalized carbocycles and heterocycles. Also, two different primary allenic allylic alcohols are shown to produce directly two-carbon extended 3-(hydroxyalkyl)-2,4-pentadienoates (E)-18 and the corresponding unsaturated lactones (Z)-18 in 37-41% yields.

  DOI：

  10.1021/jo00025a009

文献信息

• Enantioselective, Catalytic One‐Pot Synthesis of <i>γ</i> ‐Butyrolactone‐Based Fragrances
  作者：Ceyda Kumru、Thomas Classen、Jörg Pietruszka

  DOI：10.1002/cctc.201801040

  日期：2018.11.7

  Herein the preparative (1 g scale), stereoselective syntheses of various alkyl‐substituted γ‐butyrolactone fragrances 1 is described. The α,β‐unsaturated γ‐keto esters 2 as starting materials were synthesized by a Horner‐Wadsworth‐Emmons reaction and are further reduced by an ene reductase and alcohol dehydrogenase in a one‐pot enzyme cascade to nine desired γ‐butyrolactones 1, among them whisky (1 c)

  本文描述了各种烷基取代的γ-丁内酯香料1的制备（1 g规模）的立体选择性合成。以Horner-Wadsworth-Emmons反应合成作为原料的α，β-不饱和γ-酮酸酯2，并通过单罐酶级联反应中的烯还原酶和醇脱氢酶进一步将其还原为九种所需的γ-丁内酯1，其中威士忌（1 c）和白兰地内酯（1 d）。产品1以中等至良好的收率和非常好的非对映选择性获得了C。此外，对n Bu取代基的位置进行了置换，以研究其对酶级联反应的影响。
• One-flask, consecutive [3,3]- and [2,3]-sigmatropic rearrangements for conversions of propargylic alcohols into 2-carbon-extended 4-oxo-2-alkenoate esters. Use of a new 1-chloro-1-ethoxy-2-sulfinylethylene
  作者：Gary H. Posner、Jean Christophe Carry、R. David Crouch、Neil Johnson

  DOI：10.1021/jo00025a009

  日期：1991.12

  Seven differently substituted primary and secondary propargylic alcohols are shown to react with (arylsulfinyl) vinylic chloride 1a at 100-degrees-C for 1 h sequentially via a [3,3] sigmatropic rearrangement and then a [2,3] sigmatropic rearrangement to form 4-oxo-2-alkenoates 8a-8e and 9a and 9b in 52-80% yields. This one-flask, intramolecular carbon-carbon bond-forming process represents a simple and convenient method not only for regiospecific gamma-attachment onto a propargylic alcohol of a two-carbon (ethoxycarbonyl)methylene unit but also for alpha --> beta transposition of oxygen. The synthetic utility of this procedure is illustrated further by eqs 2 and 3 for preparation of regiospecifically functionalized carbocycles and heterocycles. Also, two different primary allenic allylic alcohols are shown to produce directly two-carbon extended 3-(hydroxyalkyl)-2,4-pentadienoates (E)-18 and the corresponding unsaturated lactones (Z)-18 in 37-41% yields.