2-cyano-pent-4-enoic acid ethyl ester | 3509-01-1

• 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: 2-cyano-pent-4-enoic acid ethyl ester
• 英文别名: ethyl 2-cyanopent-4-enoate
• CAS: 3509-01-1
• 化学式: C₈H₁₁NO₂
• mdl: MFCD23701928
• 分子量: 153.181
• InChiKey: GZPKRYGHDHDCKH-UHFFFAOYSA-N

物化性质

• 沸点：
  108 °C(Press: 17 Torr)
• 密度：
  1.001±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  11
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  50.1
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2926909090

反应信息

• 作为反应物：
  描述：

  2-cyano-pent-4-enoic acid ethyl ester 在 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 为溶剂， 反应 16.0h， 以46%的产率得到2-(aminomethyl)pent-4-en-1-ol
  参考文献：
  名称：

  铌在烯烃上催化的O–H和N–H键的分子内加成：加氢功能化的工具

  摘要：

  据报道，使用一种新型的基于铌的催化体系，烯烃的便捷，多功能且易于处理的烯烃分子内加氢官能化（形成C-O和C-N键）。这种原子经济和生态友好的方法为直接形成有价值的结构单元提供了额外的合成工具，从而使分子变得复杂。以高收率和选择性生产各种吡喃，呋喃，吡咯烷，哌啶，内酯和内酰胺衍生物以及螺环化合物。

  DOI：

  10.1021/acs.orglett.7b00657
• 作为产物：
  描述：

  ethyl 2-allyl-2-cyanopent-4-enoate 在 dibromobis(triphenylphosphine)nickel(II) 三乙基铝 作用下， 以 甲苯 为溶剂， 反应 24.0h， 以59%的产率得到2-cyano-pent-4-enoic acid ethyl ester
  参考文献：
  名称：

  Catalytic Deallylation of Allyl- and Diallylmalonates

  摘要：

  Substituted allylmalonates undergo the selective C-C bond cleavage in the presence of triethylaluminum and a catalytic amount of nickel and ruthenium phosphine complexes, resulting in the loss of the allyl moiety and formation of monosubstituted malonates. Comparison of reactivity of the nickel and ruthenium complexes showed that the use of the former is general with respect to the structure of the substituted allylmalonates, and the activity of the latter depended on the substitution pattern of the double bond of the allylic moiety. The smooth deallylation may encourage the use of the allyl group as a protective group for the acidic hydrogen in malonates.

  DOI：

  10.1021/ja047320t

文献信息

• A Radical Addition/Cyclization and Se‐Group Transfer Strategy for the Facile Synthesis of Se‐Containing Cyclopentenes under Metal‐Free and Peroxide‐Free Conditions
  作者：Dian‐Liang Wang、Nan‐Quan Jiang、Zhong‐Jian Cai、Shun‐Jun Ji

  DOI：10.1002/chem.202103334

  日期：2021.12.20

  A highly atom-economic intermolecular radical addition/cyclization and Se-group transfer strategy was developed for the efficient synthesis of Se-containing cyclopentenes under metal-free and peroxide-free conditions.

  开发了一种高度原子经济的分子间自由基加成/环化和硒基转移策略，用于在无金属和无过氧化物条件下有效合成含硒环戊烯。
• Catalytic Generation of Rhodium Silylenoid for Alkene–Alkyne–Silylene [2 + 2 + 1] Cycloaddition
  作者：Toshimichi Ohmura、Ikuo Sasaki、Michinori Suginome

  DOI：10.1021/acs.orglett.9b00326

  日期：2019.3.15

  2 + 1] cycloaddition takes place in the rhodium-catalyzed reaction of 1,6-enynes with borylsilanes bearing an alkoxy group on the silicon atoms, which react as synthetic equivalents of silylene. The reaction proceeds efficiently in 1,2-dichloroethane at 80–110 °C in the presence of a rhodium catalyst bearing bis(diphenylphosphino)methane (DPPM) as a ligand to afford 1-silacyclopent-2-enes in good to

  烯烃-炔烃-亚甲基[2 + 2 +1]的环加成反应是在铑催化的1,6-炔烃与在硅原子上带有烷氧基的硼烷基硅烷的反应中进行的，这些硅烷作为合成的甲硅烷基等效物进行反应。在载有双（二苯基膦基）甲烷（DPPM）作为配体的铑催化剂存在下，反应在80-110°C的1,2-二氯乙烷中有效进行，从而以高收率或高收率得到1-silacyclopent-2-enes。
• Synthesis of 5-[(Pentafluorosulfanyl)methyl]-γ-butyrolactones via a Silver-Promoted Intramolecular Cyclization Reaction
  作者：Majdouline Roudias、Audrey Gilbert、Jean-François Paquin

  DOI：10.1002/ejoc.201901163

  日期：2019.10.24

  The synthesis of 5‐[(pentafluorosulfanyl)methyl]‐γ‐butyrolactones bearing different substituents at position 3 or 4 is reported. A silver‐promoted intramolecular cyclization of substituted 4‐chloro‐5‐(pentafluorosulfanyl)pentanoic acids allows the preparation of substituted SF5‐containing γ‐butyrolactones in up to 96 % yield.

  报道了在3或4位带有不同取代基的5-[[（五氟硫烷基）甲基]-γ-丁内酯的合成。银促进的取代的4-氯-5-（五氟硫烷基）戊酸的分子内环化反应可制备取代的含SF 5的γ-丁内酯，收率高达96％。
• Double decarboxylative route to 3-substituted pyrrolidines: Reaction of monoalkyl malonates and related carboxylic acids with sarcosine and formaldehyde
  作者：Evgeny M. Buev、Anastasia A. Smorodina、Vladimir S. Moshkin、Vyacheslav Y. Sosnovskikh

  DOI：10.1016/j.tetlet.2020.151727

  日期：2020.4

  Three-component reactions of monoalkyl malonates, cyanoacetic acids or 2-ketocarboxylic acids, N-methylglycine, and formaldehyde were developed to rapidly access 3-substituted pyrrolidines in 17–97% yield. These reactions represent a double decarboxylative domino-sequence promoted by pyrrolidine and involve N-methylazomethine ylide as the reactive intermediate. 2020 Elsevier Ltd. All rights reserved

  开发了丙二酸单烷基酯，氰基乙酸或2-酮羧酸，N-甲基甘氨酸和甲醛的三组分反应，以17-97％的产率快速获得3-取代的吡咯烷。这些反应代表由吡咯烷促进的双脱羧多米诺序列，并且涉及N-甲基偶氮甲亚胺叶立德作为反应性中间体。2020 Elsevier Ltd.保留所有权利。
• A General Approach to Intermolecular Olefin Hydroacylation through Light‐Induced HAT Initiation: An Efficient Synthesis of Long‐Chain Aliphatic Ketones and Functionalized Fatty Acids
  作者：Subhasis Paul、Joyram Guin

  DOI：10.1002/chem.202004946

  日期：2021.3

  hydroacylation protocol applies to a wide array of substrates bearing numerous functional groups and many complex structural units. The reaction proves to be scalable (up to 5 g). Different functionalized fatty acids, petrochemicals and naturally occurring alkanes can be synthesized with this protocol. A radical chain mechanism is implicated in the process.

  本文介绍了一种通过使用光诱导氢原子转移（HAT）引发对未活化底物进行分子间自由基加氢酰化的操作简单，对环境无害且有效的方法。使用可商购和廉价的光引发剂（Ph 2 CO和NHPI）使该方法具有吸引力。烯烃加氢酰化方案适用于多种带有许多官能团和许多复杂结构单元的底物。该反应证明是可扩展的（最大5 g）。可以使用该方案合成不同的官能化脂肪酸，石化产品和天然存在的烷烃。自由基链机制与该过程有关。