ethyl c-α–methylcinnamate | 7042-34-4

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂酸及其衍生物
• 英文名称: ethyl c-α–methylcinnamate
• 英文别名: (Z)-ethyl 2-methyl-3-phenylacrylate；ethyl 2-methyl-3-phenylacrylate；ethyl (Z)-2-methylcinnamate；Npeipxjiyyhtmy-ktkrtigzsa-；ethyl (Z)-2-methyl-3-phenylprop-2-enoate
• CAS: 7042-34-4
• 化学式: C₁₂H₁₄O₂
• 分子量: 190.242
• InChiKey: NPEIPXJIYYHTMY-KTKRTIGZSA-N

物化性质

• 沸点：
  140 °C(Press: 15 Torr)
• 密度：
  1.038±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 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 c-α–methylcinnamate 在 水 、 sodium hydroxide 作用下， 以 乙醇 为溶剂， 反应 12.0h， 以70%的产率得到(Z)-2-methyl-3-phenylprop-2-enoic acid
  参考文献：
  名称：

  Key structural features of cis-cinnamic acid as an allelochemical

  摘要：

  1-O-cis-cinnamoyl-beta-D-glucopyranose is one of the most potent allelochemicals isolated from Spiraea thunbergii Sieb. It is suggested that it derives its strong inhibitory activity from cis-cinnamic acid, which is crucial for phytotoxicity. It was synthesized to confirm its structure and bioactivity, and also a series of cis-cinnamic acid analogues were prepared to elucidate the key features of cis-cinnamic acid for lettuce root growth inhibition. The cis-cyclopropyl analogue showed potent inhibitory activity while the saturated and alkyne analogues proved to be inactive, demonstrating the importance of the as-double bond. Moreover, the aromatic ring could not be replaced with a saturated ring. However, the 1,3-dienylcyclo-hexene analogue showed strong activity. These results suggest that the geometry of the C-C double bond between the carboxyl group and the aromatic ring is essential for potent inhibitory activity. In addition, using several light sources, the photostability of the cinnamic acid derivatives and the role of the C-C double bond were also investigated. (c) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.phytochem.2012.08.001
• 作为产物：
  描述：

  丙酸乙酯 在 lithium diisopropyl amide 作用下， 反应 2.5h， 生成 ethyl c-α–methylcinnamate
  参考文献：
  名称：

  A stereoselective, two-step preparation of .alpha.-alkyl-.alpha.,.beta.-unsaturated esters

  摘要：

  DOI：

  10.1021/jo00192a028

文献信息

• Selective hydrogenation of α,β-unsaturated carbonyl compounds on silica-supported copper nanoparticles
  作者：Jorge Mendes-Burak、Behnaz Ghaffari、Christophe Copéret

  DOI：10.1039/c8cc08457b

  日期：——

  Silica-supported copper nanoparticles prepared via surface organometallic chemistry are highly efficient for the selective hydrogenation of various α,β-unsaturated carbonyl compounds yielding the corresponding saturated esters, ketones, and aldehydes in the absence of additives. High conversions and selectivities (>99%) are obtained for most substrates upon hydrogenation at 100–150 °C and under 25

  通过表面有机金属化学方法制备的二氧化硅负载的铜纳米粒子对于各种α，β-不饱和羰基化合物的选择性加氢反应非常高效，可在没有添加剂的情况下产生相应的饱和酯，酮和醛。在100–150°C和25 bar H 2下氢化时，大多数底​​物均获得高转化率和选择性（> 99％）。
• Synthesis of functionalized phenolic derivatives via the benzannulation of dienylketenes formed by a thermal wolff rearrangement of α-diazo-β-keto compounds
  作者：Didier Collomb、Christian Deshayes、Alain Doutheau

  DOI：10.1016/0040-4020(96)00318-3

  日期：1996.5

  Eleven conjugated dienyl α-diazo-β-keto derivatives were prepared from α,β-unsaturated carbonyl compounds. Their thermolysis induced a Wolff rearrangement generating an intermediate dienyl ketene whose isomer which has the required configuration of the internal double bond underwent a benzannulation thus forming the corresponding phenolic derivatives. When γ-substituted by a methoxy group both stereoisomers

  由α，β-不饱和羰基化合物制备十一种共轭二烯基α-重氮-β-酮衍生物。他们的热解引起了Wolff重排，生成了一个中间体二烯基烯酮，该二烯烯酮的异构体具有所需的内部双键构型，并经历了苯甲环化反应，从而形成了相应的酚类衍生物。当通过甲氧基进行γ-取代时，重氮化合物的两种立体异构体由于可逆形成中间体环丁烯酮而形成酚衍生物，该中间体可将非生产性瞬态二烯基烯酮异构化为生产性二烯基烯酮。
• Chromatography-Free Wittig Reactions Using a Bifunctional Polymeric Reagent
  作者：Peter Shu-Wai Leung、Yan Teng、Patrick H. Toy

  DOI：10.1021/ol1021614

  日期：2010.11.5

  The first example of a polystyrene bearing two distinct reagent groups has been prepared. This phosphine and amine functionalized material was used in one-pot Wittig reactions with an aldehyde and either an α-halo-ester, -ketone, or -amide. Due to the heterogeneous nature of the polymer, the desired alkene product of these reactions could be isolated in excellent yield in essentially pure form after

  已经制备了带有两个不同试剂基团的聚苯乙烯的第一个例子。该膦和胺官能化的材料用于与醛和α-卤代酯，-酮或-酰胺的一锅法Wittig反应中。由于聚合物的非均质性质，仅在过滤和除去溶剂后，就可以以优异的收率以基本纯净的形式分离出这些反应的所需烯烃产物。
• Visible-Light Photoredox Catalysis: Dehalogenation of Vicinal Dibromo-, α-Halo-, and α,α-Dibromocarbonyl Compounds
  作者：Tapan Maji、Ananta Karmakar、Oliver Reiser

  DOI：10.1021/jo102239x

  日期：2011.1.21

  vic-Dibromo-, α-halo-, or α,α-dibromocarbonyl compounds can be efficiently dehalogenated using catalytic tris(2,2′-bipyridyl)ruthenium dichloride (Ru(bpy)3Cl2) in combination with 1,5-dimethoxynaphthalene (DMN) and ascorbate as sacrificial electron donor. For this process, a visible light promoted photocatalytic cycle is proposed that involves the reduction of carbon halogen bonds via free radical

  使用催化三氯化三（2,2'-联吡啶基）钌（Ru（bpy）3 Cl 2）与1,5-结合可以有效地使vic -Dibromo-，α-卤代或α，α-二溴代羰基化合物脱卤二甲氧基萘（DMN）和抗坏血酸盐作为牺牲电子给体。对于该方法，提出了可见光促进的光催化循环，该循环涉及通过自由基中间体还原碳卤键。
• Hydrodebromination of allylic and benzylic bromides with water catalyzed by a rhodium porphyrin complex
  作者：Wu Yang、Chen Chen、Kin Shing Chan

  DOI：10.1039/c8dt02168f

  日期：——

  complex catalyst using water as the hydrogen source without a sacrificial reductant. Mechanistic investigations suggest that bromine atom abstraction via a rhodium porphyrin metalloradical operates to give the rhodium porphyrin alkyl species and the subsequent hydrolysis of the rhodium porphyrin alkyl species to a hydrocarbon product is a key step to harness the hydrogen from water.

  通过使用水作为氢源而没有牺牲还原剂的铑卟啉配合物催化剂成功地实现了烯丙基和苄基溴的加氢脱溴。机理研究表明，通过铑卟啉金属骨架提取溴原子可得到铑卟啉烷基物质，随后铑卟啉烷基物质水解为烃产物是从水中利用氢的关键步骤。

表征谱图