perfluorophenyl 4-phenylbutanoate | 1611477-20-3

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚酯
• 英文名称: perfluorophenyl 4-phenylbutanoate
• CAS: 1611477-20-3
• 化学式: C₁₆H₁₁F₅O₂
• 分子量: 330.254
• InChiKey: IFWFHJYBBKVWKM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.31
• 重原子数：
  23.0
• 可旋转键数：
  5.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  rac-(1R,2R)-perfluorophenyl 2-phenylcyclopropanecarboxylate 在 samarium diiodide 、 水 作用下， 以 四氢呋喃 为溶剂， 反应 0.02h， 以21.8%的产率得到perfluorophenyl 4-phenylbutanoate
  参考文献：
  名称：

  Ketyl-Type Radicals from Cyclic and Acyclic Esters are Stabilized by SmI₂(H₂O)_n: The Role of SmI₂(H₂O)_n in Post-Electron Transfer Steps

  摘要：

  Mechanistic details pertaining to the SmI2-H2O-mediated reduction and reductive coupling of 6-membered lactones, the first class of simple unactivated carboxylic acid derivatives that had long been thought to lie outside the reducing range of SmI2, have been elucidated. Our results provide new experimental evidence that water enables the productive electron transfer from Sm(II) by stabilization of the radical anion intermediate rather than by solely promoting the first electron transfer as originally proposed. Notably, these studies suggest that all reactions involving the generation of ketyl-type radicals with SmI2 occur under a unified mechanism based on the thermodynamic control of the second electron transfer step, thus providing a blueprint for the development of a broad range of novel chemoselective transformations via open-shell electron pathways.

  DOI：

  10.1021/ja503494b

文献信息

• Mechanism of SmI₂/Amine/H₂O-Promoted Chemoselective Reductions of Carboxylic Acid Derivatives (Esters, Acids, and Amides) to Alcohols
  作者：Michal Szostak、Malcolm Spain、Andrew J. Eberhart、David J. Procter

  DOI：10.1021/jo5018525

  日期：2014.12.19

  Samarium(II) iodide–water–amine reagents have emerged as some of the most powerful reagents (E° = −2.8 V) for the reduction of unactivated carboxylic acid derivatives to primary alcohols under single electron transfer conditions, a transformation that had been considered to lie outside the scope of the classic SmI2 reductant for more than 30 years. In this article, we present a detailed mechanistic

  single（II）碘化物-水-胺试剂已成为一些最强大的试剂（E °= -2.8 V），可在单电子转移条件下将未活化的羧酸衍生物还原为伯醇。超过经典SmI 2还原剂的使用范围已超过30年。在本文中，我们提供了使用SmI 2还原未活化的酯，羧酸和酰胺的详细机理研究-水-胺试剂，我们在其中比较三个官能团的反应性。已使用以下方法研究了该机理：（i）动力学，（ii）反应性，（iii）自由基钟和（iv）同位素标记实验。动力学数据表明，对于三个官能团，所有反应组分（SmI 2，胺，水）都包含在速率方程中，并且碱辅助的水去质子化促进了电子转移的速率。值得注意的是，本文给出的机理细节表明SmI 2之间的复合，水和胺类可产生一类结构多样，热力学强大的还原剂，可将电子有效转移到各种羧酸衍生物中。这些观察结果将对涉及Sm（II）还原酮基还原反应的新工艺的设计和优化产生重要影响。