(Z)-ethyl-6-formylhex-2-enoate | 67081-16-7

• 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: (Z)-ethyl-6-formylhex-2-enoate
• 英文别名: ethyl (Z)-7-oxohept-2-enoate；Z-7-ethoxy-7-oxo-5-heptenal；cis-7-Oxo-2-heptensaeureethylester
• CAS: 67081-16-7
• 化学式: C₉H₁₄O₃
• 分子量: 170.208
• InChiKey: PCWFTLPHDUBEJX-ALCCZGGFSA-N

物化性质

• 沸点：
  125-135 °C(Press: 22 Torr)
• 密度：
  0.992±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  12
• 可旋转键数：
  7
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (Z)-ethyl-6-formylhex-2-enoate 在 三丁基膦 作用下， 以 氯仿 为溶剂， 反应 24.0h， 以70%的产率得到6-hydroxy-cyclohex-1-enecarboxylic acid ethyl ester
  参考文献：
  名称：

  评估由仲胺，硫醇和膦介导的串联迈克尔/分子内羟醛反应的范围

  摘要：

  已发现由仲胺，硫醇和膦介导的串联迈克尔/分子内羟醛反应的结果高度依赖于底物，使用硫醇或硫醇盐亲核试剂形成5元和6元环可获得最佳结果。发现胺和膦介导的环化在某些情况下是有问题的，但仍然是形成5-7元环的有效方法。

  DOI：

  10.1016/s0040-4020(01)00744-x
• 作为产物：
  描述：

  (Z)-ethyl 7-hydroxyhept-2-enoate 在 草酰氯 、 二甲基亚砜 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 生成 (Z)-ethyl-6-formylhex-2-enoate
  参考文献：
  名称：

  Diastereoselective Synthesis of Cycloalkylamines by Samarium Diiodide-Promoted Cyclizations of α-Amino Radicals Derived from α-Benzotriazolylalkenylamines

  摘要：

  The condensation of omega-unsaturated aldehydes with benzotriazole and secondary amines affords alpha-benzotriazolylalkenylamines that exist in solution as mixtures of the corresponding benzotriazol-1-yl and benzotriazol-2-yl isomers resulting from their rapid dissociation into iminium cations and the benzotriazolyl anion. The reduction of these adducts with samarium diiodide (SmI2) takes place with formation of the benzotriazolyl anion and alpha-amino alkenyl radicals that undergo 5- or 6-exo-trig cyclizations leading to substituted cycloalkyl- or cycloheteroalkylamines. The presence of an electron-withdrawing substituent in the alkene subunit is required for efficient cyclizations. The formation of cyclopentylamines takes place with unusually high 1,5-cis selectivity (hex-5-enyl radical numbering), and the presence of a 2- or 4-Me substituent also imparts high 1,2- or 1,4-trans stereoinduction, respectively. The corresponding six-membered rings, however, are formed with low diastereoselectivity. Semiempirical calculations performed on model systems suggest that a stabilizing secondary orbital interaction between the amino group and the electron-deficient alkene might in part account for the enhanced cis-selectivity encountered.

  DOI：

  10.1021/jo960957d

文献信息

• One-Pot Organocatalytic Enantioselective Michael–Michael–Aldol–Henry Reaction Cascade. A Facile Entry to the Steroid System with Six Contiguous Stereogenic Centers
  作者：Dai-Huei Jhuo、Bor-Cherng Hong、Chun-Wei Chang、Gene-Hsiang Lee

  DOI：10.1021/ol501011t

  日期：2014.5.16

  An expedited method has been developed for the enantioselective synthesis of highly functionalized steroid systems containing six contiguous stereogenic centers with high enantioselectivities (99% ee). The one-pot methodology comprises a cascade of organocatalytic Michael–Michael–aldol–Henry reactions of 7-nitrohept-3-en-2-one and 5-(1-methyl-2,5-dioxocyclopentyl)pent-2-enal. The structure and absolute

  已开发出一种快速方法，用于对高度功能化的类固醇系统的对映选择性合成，该系统包含六个具有高对映选择性（99％ee）的连续立体发生中心。一锅法包括7-硝基庚-3-烯-2-酮和5-（1-甲基-2,5-二氧代环戊基）戊-2-烯醛的有机催化Michael–Michael–aldol–Henry反应级联。通过适当产品的X射线分析确认了产品的结构和绝对构型。
• Photochemical Reactions of 2-(Alkoxycarbonyl)-, 2-Cyano-, and 2-(Phenylthio)-cycloalkanones in Alcoholic Solution. Formation of ω-Substituted Esters
  作者：Masao Tokuda、Yasuyuki Watanabe、Mitsuomi Itoh

  DOI：10.1246/bcsj.51.905

  日期：1978.3

  underwent similar reactions to give the corresponding ω-alkoxycarbonyl esters. Photochemical reactions of 2-cyanocyclohexanones in methanol similarly gave ω-cyano esters and ω-formyl α,β-unsaturated nitriles. However, photochemical reactions of 2-(phenylthio)- and 2-(methylthio)cyclohexanones in methanol did not give the corresponding ω-phenylthio or ω-methylthio carboxylic acid esters, products resulting

  2-氧代-1-环己烷羧酸乙酯 (3) 在甲醇中的光化学反应得到庚二酸甲酯乙酯、7-氧代-2-庚烯酸反式和顺式乙酯以及 25、7、8 中的 7-氧代-3-庚烯酸乙酯和 21% 的收益率，分别。3 在乙醇、异丙醇和叔丁醇中的光化学反应得到相应的 ω-烷氧基羰基酯。其他 2-(烷氧基羰基)-环戊酮和-环庚酮进行类似的反应，得到相应的 ω-烷氧基羰基酯。2-氰基环己酮在甲醇中的光化学反应同样得到 ω-氰基酯和 ω-甲酰基 α,β-不饱和腈。然而，2-(苯硫基)-和2-(甲硫基)环己酮在甲醇中的光化学反应没有得到相应的ω-苯硫基或ω-甲硫基羧酸酯，
• Organocatalytic Double Michael Reaction of 7-Oxohept-2-enoates and Nitrostyrene – Formal Synthesis of (–)-α- and (–)-β-Lycorane
  作者：Bor-Cherng Hong、Roshan Y. Nimje、Ming-Fun Wu、Amit A. Sadani

  DOI：10.1002/ejoc.200701122

  日期：2008.3

  Organocatalytic conjugate addition of 7-oxohept-2-enoate to nitrostyrene provided an ω-nitro-α,β-unsaturated ester. Subsequent intramolecular cyclization afforded the highly functionalized cyclohexane carboester with four stereogenic centers with high diastereoselectivity and high enantioselectivity (>99 % ee). Some adducts were transformed into the intermediates of the synthesis of (–)-α- and (–)-β-lycorane

  7-oxohept-2-enoate 与硝基苯乙烯的有机催化共轭加成提供了 ω-硝基-α,β-不饱和酯。随后的分子内环化提供了具有四个立体中心的高度官能化的环己烷碳酸酯，具有高非对映选择性和高对映选择性（> 99 % ee）。一些加合物转化为合成 (-)-α- 和 (-)-β-lycorane 的中间体。将反应应用于相应的二醛提供双环 [2.2.2] 辛烷。（© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008）
• KOSSANYI J.; PERALES J.; KAWENOKI I.; MORIZUR J. P.; LAACHACH A., SYNTHESIS, 1979, NO 4, 279-281
  作者：KOSSANYI J.、 PERALES J.、 KAWENOKI I.、 MORIZUR J. P.、 LAACHACH A.

  DOI：——

  日期：——
• TOKUDA MASAO; WATANABE YASUYUKI; ITOH MITSUOMI, BULL. CHEM. SOC. JAP., 1978, 51, NO 3, 905-908
  作者：TOKUDA MASAO、 WATANABE YASUYUKI、 ITOH MITSUOMI

  DOI：——

  日期：——