ethyl (E)-3-cyclohexylbut-2-enoate

• 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)-3-cyclohexylbut-2-enoate
• 英文别名: (E)-ethyl 3-cyclohexylbut-2-enoate
• 化学式: C₁₂H₂₀O₂
• 分子量: 196.29
• InChiKey: QYHINSWQNUZZDQ-MDZDMXLPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 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)-3-cyclohexylbut-2-enoate 在 [Rh{(S,S)-Phebox-sBu}(OAc)2] 甲基二乙氧基硅烷 、 异丙基氯化镁 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 2.0h， 生成 (S)-4-cyclohexyl-2-pentanone
  参考文献：
  名称：

  用手性铑（2,6-双恶唑啉基苯基）催化剂不对称地还原α，β-不饱和酮和酯。

  摘要：

  在手性铑（2,6-双恶唑啉基苯基）络合物的存在下，用烷氧基氢硅烷以高收率和高对映选择性完成了β，β-二取代的α，β-不饱和酮和酯的新的不对称共轭还原。（E）-4-苯基-3-戊烯-2-酮和（E）-4-苯基-4-异丙基-3-戊烯-2-酮在60°C下容易在95％ee和98％ee中还原分别以1 mol％的催化剂负载量进行。（EtO）2MeSiH被证明是最佳的氢供体选择。（E）-β-甲基肉桂酸叔丁酯和β-异丙基肉桂酸酯也可以还原为相应的二氢肉桂酸酯衍生物，直到ee高达98％。

  DOI：

  10.1002/chem.200500841
• 作为产物：
  描述：

  乙酰基环己烷 在 锌 、 三氯氧磷 作用下， 以 氯仿 、 苯 为溶剂， 反应 14.0h， 生成 ethyl (E)-3-cyclohexylbut-2-enoate
  参考文献：
  名称：

  基于辅助SN2'反应的四元立体中心的不对称构建：1,7-相对立体形成的案例

  摘要：

  The stereoselective construction of quaternary stereogenic centers is described that employs an allylic substitution through the intermediacy of a chiral carbamate leaving group. Five carbamates with two substituents at the allylic terminus combined with phenylcopper or n-butylcopper to provide alkenes in moderate to good yields and with moderate to high enantioselectivities at the newly created quaternary stereogenic center. The E-carbamate with methyl and cyclohexyl substituents at the gamma-terminus provided the highest yield (87%) and enantioselectivity (>99.9:0.1 er) of all the substitution patterns tested. The corresponding Z-carbamate gave the lowest enantioselectivity observed (80.0:20.0). Carbamates with other substituents (n-butyl and t-butyl) at the E-terminal position gave moderate yields and enantioselectivities of alkenes. Cinnamyl substrates also provided good yields of alkenes with moderate enantioselectivities. The origin of enantioselectivity is analyzed in the context of dimeric lithioheterocuprate structures.

  DOI：

  10.3987/com-13-s(s)82

文献信息

• Catalytic hydrogenation of α,β-unsaturated carboxylic acid derivatives using copper(<scp>i</scp>)/N-heterocyclic carbene complexes
  作者：Birte M. Zimmermann、Sarah C. K. Kobosil、Johannes F. Teichert

  DOI：10.1039/c8cc09853k

  日期：——

  air-stable copper(I)/N-heterocyclic carbene complex enables the catalytic hydrogenation of enoates and enamides, hitherto unreactive substrates employing homogeneous copper catalysis and H2 as a terminal reducing agent. This atom economic transformation replaces commonly employed hydrosilanes and can also be carried out in an asymmetric fashion.

  简单且空气稳定的铜（I）/ N-杂环卡宾络合物能够实现烯酸酯和烯酰胺的催化氢化，这是迄今为止使用均相铜催化和H 2作为末端还原剂的非反应性底物。这种原子经济的转变代替了常用的氢硅烷，并且也可以以不对称的方式进行。
• Highly Enantioselective Iridium-Catalyzed Hydrogenation of α,β-Unsaturated Esters
  作者：Jia-Qi Li、Xu Quan、Pher G. Andersson

  DOI：10.1002/chem.201200907

  日期：2012.8.20

  α,β‐Unsaturated esters have been employed as substrates in iridium‐catalyzed asymmetric hydrogenation. Full conversions and good to excellent enantioselectivities (up to 99 % ee) were obtained for a broad range of substrates with both aromatic‐ and aliphatic substituents on the prochiral carbon. The hydrogenated products are highly useful as building blocks in the synthesis of a variety of natural

  在铱催化的不对称氢化反应中，α，β-不饱和酯已被用作底物。对于在手性碳上同时具有芳族和脂族取代基的多种底物，可实现完全转化和良好至优异的对映选择性（高达99％  ee）。氢化产物在多种天然产物和药物的合成中作为构建基非常有用。
• An Oxidative [2,3]-Sigmatropic Rearrangement of Allylic Hydrazides
  作者：Benjamin F. Strick、Devon A. Mundal、Regan J. Thomson

  DOI：10.1021/ja2066219

  日期：2011.9.14

  The development of an efficient oxidative [2,3]-sigmatropic rearrangement of allylic hydrazides, via singlet N-nitrene intermediates, is reported. The requisite allylic hydrazide precursors are readily prepared and undergo smooth sigmatropic rearrangement upon exposure to iodosobenzene. The products of this novel transformation are shown to be useful precursors to a variety of compounds.

  据报道，通过单线态 N-硝烯中间体开发了烯丙基酰肼的有效氧化 [2,3]-sigmatropic 重排。必需的烯丙基酰肼前体很容易制备，并在暴露于碘代苯后进行平滑的σ重排。这种新转化的产物被证明是各种化合物的有用前体。
• SUBSTITUTED CYANO CYCLOALKYL PENTA-2,4-DIENES, CYANO CYCLOALKYL PENT-2-EN-4-YNES, CYANO HETEROCYCLYL PENTA-2,4-DIENES AND CYANO HETEROCYCLYL PENT-2-EN-4-YNES AS ACTIVE SUBSTANCES
  申请人：BAYER CROPSCIENCE AKTIENGESELLSCHAFT

  公开号：US20170210701A1

  公开（公告）日：2017-07-27

  The invention relates to cyano cycloalkyl penta-2,4-dienes, cyano cycloalkyl pent-2-en-4-ynes, cyano heterocyclyl penta-2,4-dienes and cyano heterocyclyl pent-2-en-4-ynes of general formula (I), or the salts thereof, where [X-Y], Q, R 1 , R 2 , A 1 , A 2 , V, W, m and n have the definitions specified in the description. The invention also relates to a production method for same and to the use of same for increasing stress tolerance in plants against abiotic stress, and/or for increasing the plant yield.

  该发明涉及一般式(I)的氰基环烷基戊二烯、氰基环烷基戊-2-炔、氰基杂环烷基戊二烯和氰基杂环烷基戊-2-炔，或其盐，其中[X-Y]、Q、R1、R2、A1、A2、V、W、m和n的定义如描述中所指定。该发明还涉及同类物质的生产方法以及将其用于增加植物对非生物胁迫的抗逆性和/或增加植物产量。
• Improved Catalysts for the Iridium‐Catalyzed Asymmetric Isomerization of Primary Allylic Alcohols Based on Charton Analysis
  作者：Luca Mantilli、David Gérard、Sonya Torche、Céline Besnard、Clément Mazet

  DOI：10.1002/chem.201001311

  日期：2010.11.8

  improved generation of chiral cationic iridium catalysts for the asymmetric isomerization of primary allylic alcohols is disclosed. The design of these air‐stable complexes relied on the preliminary mechanistic information available, and on Charton analyses using two preceding generations of iridium catalysts developed for this highly challenging transformation. Sterically unbiased chiral aldehydes

  公开了用于伯烯丙基醇的不对称异构化的手性阳离子铱催化剂的改进的产生。这些空气稳定的配合物的设计依赖于可用的初步机理信息，并且依赖于Charton分析，Charton使用前两代为该极富挑战性的转化而开发的铱催化剂进行了分析。具有高水平的对映选择性，获得了以前无法获得的立体无偏手性醛，因此验证了有关所选配体设计元素的最初假设。还介绍了在大多数情况下实现高对映选择性的基本原理。