ethyl (Z)-3-phenylbut-2-enoate | 64701-76-4

• 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 (Z)-3-phenylbut-2-enoate
• 英文别名: Ethyl-(Z)-3-cyclopropyl-3-phenyl-2-propenoat；ethyl (Z)-3-cyclopropyl-3-phenylprop-2-enoate
• CAS: 64701-76-4
• 化学式: C₁₄H₁₆O₂
• 分子量: 216.28
• InChiKey: IMALOEKNEKPARA-JLHYYAGUSA-N

物化性质

• 沸点：
  318.0±12.0 °C(Predicted)
• 密度：
  1.103±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  16
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  苯基环丙基甲酮 在 sodium hydride 、 维生素 B2 作用下， 以 四氢呋喃 、 乙腈 为溶剂， 反应 24.0h， 生成 ethyl (Z)-3-phenylbut-2-enoate
  参考文献：
  名称：

  A Bio-Inspired, CatalyticE→ZIsomerization of Activated Olefins

  摘要：

  Herein, Nature's flavin-mediated activation of complex (poly)enes has been translated to a small molecule paradigm culminating in a highly (Z)-selective, catalytic isomerization of activated olefins using (-)-ribo-flavin (up to 99:1 Z/E). In contrast to the prominent Z -> E isomerization of the natural system, it was possible to invert the directionality of the isomerization (E -> Z) by simultaneously truncating the retinal scaffold, and introducing a third olefin substituent to augment A1,3-strain upon isomerization. Consequently, conjugation is reduced in the product chromophore leading to a substrate/product combination with discrete photophysical signatures. The operationally simple isomerization protocol has been applied to a variety of enone-derived substrates and showcased in the preparation of the medically relevant 4-substituted coumarin scaffold. A correlation of sensitizer triplet energy (ET) and reaction efficiency, together with the study of additive effects and mechanistic probes, is consistent with a triplet energy transfer mechanism.

  DOI：

  10.1021/jacs.5b07136

文献信息

• The Photochemistry of 2-Cyclopentenyl Methyl Ketones
  作者：Hans-Ulrich Gonzenbach、Inga-Mai Tegmo-Larsson、Jean-Pierre Grosclaude、Kurt Schaffner

  DOI：10.1002/hlca.19770600334

  日期：1977.4.20

  3-phenyl-2-cyclopentenyl methyl ketones (15–18, 30, 31) undergo a 1,3-acetyl shift on direct irradiation, and the oxa-di-π-methane rearrangement to photochemically non-interconverting endo and exo bicyclo-[2.1.0]pentyl methyl ketones on triplet sensitization. Exceptions include the 2-methyl-3-phenyl-2-cyclopentenyl methyl ketone 32 and the 1-phenyl-2-cyclo-pentenyl methyl ketone 44 which are unreactive

  2-环戊烯基和3-苯基-2-环戊烯基甲基酮（15-18、30、31）在直接辐照下发生1,3-乙酰基转移，并且氧-二-π-甲烷重排成光化学非互变内和外双环- [2.1.0]戊基甲基酮在三线态敏化。分别包括2-甲基-3-苯基-2-环戊烯基甲基酮32和1-苯基-2-环戊烯基甲基酮44，它们分别在直接照射和三重态敏化时不反应，而在2-苯基-在任何一种条件下都不反应的2-环戊烯基甲基酮42和43。3-苯基-2-环戊烯基甲基酮的反应性三重态通过比较刚性玻璃中其在77K处的磷光与1-苯基-环戊烯的磷光以及与量子点的独立性，可以确定30为E T = 59 kcal / mol的局域苯乙烯π，π* -态。敏化剂能量在61–74 kcal / mol的范围内。
• A Bio-Inspired, Catalytic<i>E</i>→<i>Z</i>Isomerization of Activated Olefins
  作者：Jan B. Metternich、Ryan Gilmour

  DOI：10.1021/jacs.5b07136

  日期：2015.9.9

  Herein, Nature's flavin-mediated activation of complex (poly)enes has been translated to a small molecule paradigm culminating in a highly (Z)-selective, catalytic isomerization of activated olefins using (-)-ribo-flavin (up to 99:1 Z/E). In contrast to the prominent Z -> E isomerization of the natural system, it was possible to invert the directionality of the isomerization (E -> Z) by simultaneously truncating the retinal scaffold, and introducing a third olefin substituent to augment A1,3-strain upon isomerization. Consequently, conjugation is reduced in the product chromophore leading to a substrate/product combination with discrete photophysical signatures. The operationally simple isomerization protocol has been applied to a variety of enone-derived substrates and showcased in the preparation of the medically relevant 4-substituted coumarin scaffold. A correlation of sensitizer triplet energy (ET) and reaction efficiency, together with the study of additive effects and mechanistic probes, is consistent with a triplet energy transfer mechanism.