ethyl 2,2-difluoro-5-phenylpentanoate | 128483-82-9

• 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 2,2-difluoro-5-phenylpentanoate
• 英文别名: Ethyl-2,2-difluoro-5-phenyl-pentanoate
• CAS: 128483-82-9
• 化学式: C₁₃H₁₆F₂O₂
• 分子量: 242.266
• InChiKey: CQLONNQAAINBKW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  17
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  ethyl 2,2-difluoro-5-phenylpentanoate 在 正丁基锂 、 (S,S,S)-Ph-SKP 、 copper(l) chloride 、 sodium t-butanolate 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 25.0h， 生成 (S)-5,5-difluoro-4-methyl-8-phenyloct-1-yn-4-ol
  参考文献：
  名称：

  铜催化不对称丙炔化反应合成手性叔α，α-二氟甲基甲醇。

  摘要：

  手性α，α-二氟甲基甲醇是许多治疗剂中反复出现的结构基序。尽管人们对这类化合物的催化不对称合成有浓厚的兴趣，但该研究领域仍未得到充分的开发。在本文中，已经开发出一种有效的方法，其通过Cu与（频哪醇基）烯丙基硼的α，α-二氟酮的对映体选择性炔丙基化，来开发一系列手性均丙基α，α-二氟甲基甲醇。在由CuCl和基于螺酮基的二膦（SKP）配体原位生成的亚铜配合物的存在下，各种芳基，杂芳基，烷基，炔基，烯基或苄氧羰基取代的α，α-二氟甲基甲醇以75-99％的收率获得具有84-98％ee值的有机化合物。使用组合动态NMR光谱进一步研究了催化体系，X射线晶体学和非线性效应研究。对映选择性的起源是基于DFT计算合理化的。最后，展示了几种有效的转化方法，以突出该方案在合成带有α，α-二氟甲基甲醇部分的复杂化合物中的实用性。

  DOI：

  10.1002/chem.201904543
• 作为产物：
  描述：

  methyl 2-oxo-5-phenylpentanoate 在 二乙胺基三氟化硫 作用下， 生成 ethyl 2,2-difluoro-5-phenylpentanoate
  参考文献：
  名称：

  Synthesis of Polyfluoro Ketones for Selective Inhibition of Human Phospholipase A₂ Enzymes

  摘要：

  The development of selective inhibitors for individual PLA(2) enzymes is necessary in order to target PLA(2)-specific signaling pathways, but it is challenging due to the observed promiscuity of known PLA(2) inhibitors. In the current work, we present the development and application of a variety of synthetic routes to produce pentafluoro, tetrafluoro, and trifluoro derivatives of activated carbonyl groups in order to screen for selective inhibitors and characterize the chemical properties that can lead to selective inhibition. Our results demonstrate that the pentafluoroethyl ketone functionality favors selective inhibition of the GVIA iPLA(2), a very important enzyme for which specific, potent, reversible inhibitors are needed. We find that 1,1,1,2,2-pentafluoro-7-phenyl-heptan-3-one (FKGK11) is a selective inhibitor of GVIA iPLA(2) (X-1(50) = 0.0073). Furthermore, we conclude that the introduction of an additional fluorine atom at the alpha' position of a trifluoromethyl ketone constitutes an important strategy for the development of new potent GVIA iPLA(2) inhibitors.

  DOI：

  10.1021/jm800649q

文献信息

• Reactions of ethyl bromodifluoroacetate in the presence of copper powder
  作者：K. Sato、M. Omote、A. Ando、I. Kumadaki

  DOI：10.1016/j.jfluchem.2003.11.023

  日期：2004.4

  We have examined the reaction of ethyl bromodifluoroacetate (1) in the presence of copper powder as a procedure for the synthesis of compounds containing a CF2 group. The complex formed in the above reaction reacted with vinyl or aryl iodides to give cross-coupling products, with Michael acceptors to give 1,4-addition products and with olefins to give radical addition products. The cross-coupling reaction

  我们已经研究了在铜粉存在下溴二氟乙酸乙酯（1）的反应，作为合成含有CF 2基团的化合物的方法。在上述反应中形成的配合物与乙烯基或芳基碘化物反应，得到交叉偶联产物，与迈克尔受体得到1，4-加成产物，与烯烃得到自由基加成产物。将交叉偶联反应用于4,4-二氟-α-生育酚的合成。
• Nickel-Catalyzed <i>anti</i>-Markovnikov Hydrodifluoroalkylation of Unactivated Alkenes
  作者：Li-Ming Yin、Meng-Chan Sun、Xiao-Ju Si、Dandan Yang、Mao-Ping Song、Jun-Long Niu

  DOI：10.1021/acs.orglett.1c04346

  日期：2022.2.4

  An efficient Ni-catalyzed hydrodifluoroalkylation of unactivated alkenes with bromodifluoroacetate by using PhSiH3 as hydride source was developed. The transformation affords aliphatic difluorides with anti-Markovnikov regioselectivity. A wide range of highly remote alkenes, simple alkenes, drug molecules, commercially available CF2 precursors, and even nonfluorinated substrates are competent in this

  通过使用PhSiH 3作为氢化物源，开发了一种有效的Ni 催化的未活化烯烃与溴二氟乙酸盐的氢二氟烷基化反应。该转化提供了具有抗马尔科夫尼科夫区域选择性的脂肪族二氟化物。广泛的高度远程烯烃、简单烯烃、药物分子、市售CF 2前体，甚至非氟化底物在温和条件下都能胜任该反应，证明了该策略的实用性。此外，机理研究表明，二氟烷基自由基可能是这种转变的关键中间体。
• Reversal of stereoselectivity in the Evans aldol reaction of α,α-difluoro and α,α,α-trifluoro carbonyl compounds
  作者：Katsuhiko Iseki、Satoshi Oishi、Yoshiro Kobayashi

  DOI：10.1016/0040-4020(95)00858-6

  日期：1996.1

  The Evans aldol reaction of hexafluoroacetone and trifluoroacetaldehyde causes complete reversal of diastereofacial selectivity. The boron enolate derived from N-acyloxazolidinone 2 reacts with trifluoroacetaldehyde to give anti and “non-Evans” syn aldols with stereoselectivity in the range of 7:3–17:3. With α,α-difluoroaldehyde 4b, a small amount of the normal syn aldol was formed. However, the anti

  六氟丙酮和三氟乙醛的埃文斯醛醇醛缩合反应完全逆转了非对映选择性。衍生自N-酰基氧杂唑烷酮2的烯醇硼与三氟乙醛反应生成立体选择性为7：3-17：3的抗和“非Evans”顺式醇醛。与α，α-二氟醛4b一起，形成少量的正常顺式醇醛。但是，抗羟醛是主要产品。
• Radical Reaction Using an Organocopper Reagent Derived from Ethyl Bromodifluoroacetate
  作者：Kazuyuki Sato、Yuko Ogawa、Misato Tamura、Mika Harada、Terumasa Ohara、Masaaki Omote、Akira Ando、Itsumaro Kumadaki

  DOI：10.1135/cccc20021285

  日期：——

  In our previous work, reaction of ethyl bromodifluoroacetate (1) in the presence of Cu powder with olefins activated by an electron-withdrawing group gave the Michael-type adducts through an anionic intermediate. The same reaction with non-activated olefins was found to give addition products by a radical mechanism. The radical intermediate from α-methylstyrene was stabilized by a benzene ring and gave novel dimerization products. This reaction with 1-decene provided a convenient route to 2,2-difluorododecanoic acid.

  在我们之前的工作中，乙基溴二氟乙酸酯（1）在Cu粉的存在下与由电子吸引基团激活的烯烃反应，通过阴离子中间体形成Michael型加合物。发现使用未激活的烯烃进行相同反应会通过自由基机理形成加成产物。α-甲基苯乙烯的自由基中间体由苯环稳定并产生新的二聚产物。这种反应与1-癸烯提供了制备2,2-二氟十二酸的便捷途径。
• PERFLUOROKETONE COMPOUNDS AND USES THEREOF
  申请人：David Samuel

  公开号：US20100048727A1

  公开（公告）日：2010-02-25

  Novel perfluoroketone compounds of formula [I] and [Ia] are described. Also described are uses thereof, such as for inhibition of phospholipase A 2 activity. Therapeutic uses thereof are also described, such as for the treatment of neural conditions and/or inflammatory conditions, such as demyelinating (e.g., multiple sclerosis) and neural injury (e.g., spinal cord injury).

  本文描述了化学式[I]和[Ia]的新型全氟酮化合物。还描述了它们的用途，例如用于抑制磷脂酶A2活性。还描述了它们的治疗用途，例如用于治疗神经疾病和/或炎症疾病，如脱髓鞘（例如多发性硬化症）和神经损伤（例如脊髓损伤）。