(S)-ethyl 2-hydroxy-4-methyl-2-trifluoromethyl-4-pentenoate | 887375-50-0

• 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: (S)-ethyl 2-hydroxy-4-methyl-2-trifluoromethyl-4-pentenoate
• 英文别名: (S)-2-Hydroxy-2-(trifluoromethyl)-4-methyl-4-pentenoic acid ethyl ester；ethyl (2S)-2-hydroxy-4-methyl-2-(trifluoromethyl)pent-4-enoate
• CAS: 887375-50-0
• 化学式: C₉H₁₃F₃O₃
• 分子量: 226.196
• InChiKey: OUJRZMYAWPFRSV-QMMMGPOBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  15
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  3,3,3-三氟丙酮酸乙酯 、 异丁烯 在 silver hexafluoroantimonate 、 Pd((R)-tBu-BIPHEP)Cl2 作用下， 反应 0.67h， 以97%的产率得到(S)-ethyl 2-hydroxy-4-methyl-2-trifluoromethyl-4-pentenoate
  参考文献：
  名称：

  Stable Axial Chirality in Metal Complexes Bearing 4,4′-Substituted BIPHEPs: Application to Catalytic Asymmetric Carbon–Carbon Bond-Forming Reactions

  摘要：

  不仅是电子效应，4,4′-取代基在BIPHEP衍生物及金属（Pd、Pt和Au）配合物中的空间效应也被证明会影响联苯单键旋转的稳定性。在4,4′-位置的电子供体或空间占位需求较大的取代基会使BIPHEP衍生物的轴向手性不稳定，而电子吸引或空间占位需求较小的取代基则会稳定轴向手性。特别是，带有t-Bu和CF3取代基的钯二氯化物配合物的轴向手性表现出最大的易变性和稳定性（在300 K时，ΔG≠ = 29.22和30.49 kcal mol−1；t1/2 = 7年和56年）。这些对映体纯的二阳离子BIPHEP–Pd配合物可用于催化对映选择性的芳烃化、烯烃化和烯反应，以良好至优异的产率和对映选择性生成相应的产品。重要的是，在三氟丙酮酸与异丁烯的羰基-烯反应中，周转频率（TOF）达到了58200 h−1。4,4′-取代基在BIPHEP衍生物中的显著影响可作为设计多用途高效配体的指导原则。

  DOI：

  10.1246/bcsj.20110309

文献信息

• METHOD FOR PRODUCING OPTICALLY ACTIVE FLUORINE-CONTAINING CARBONYL-ENE PRODUCT
  申请人：Central Glass Company, Limited

  公开号：EP2098501B1

  公开（公告）日：2017-08-23
• Chiral Pd-catalyzed trifluoropyruvate-ene reactions with steroidal side chains for late-stage fluoromethyl-functionalization: remarkably high agonist activities of ene products even in low VDR binding affinity
  作者：Kumiko Fujita、Junpei Aida、Koichi Mikami

  DOI：10.1016/j.tet.2015.05.109

  日期：2015.9

  The highly enantioselective trifluoropyruvate-ene reactions of chiral steroid side chain olefins were achieved by dicationic palladium complexes as chiral Lewis acid catalysts to give steroidal ene-products in high diastereoselectivity. The ene products exhibited remarkably high agonist activities for human osteocalcin even in low vitamin D receptor binding affinity for human vitamin D hormone receptor. (C) 2015 Elsevier Ltd. All rights reserved.
• Method for Producing Optically Active Fluorine-Containing Carbonyl-ene Product
  申请人：Mikami Koichi

  公开号：US20090312574A1

  公开（公告）日：2009-12-17

  An optically active, fluorine-containing carbonyl-ene product is produced by reacting a fluorine-containing α-ketoester with an alkene in the presence of a transition metal complex having an optically active ligand. There are Mode 1 of conducting this reaction in the absence of reaction solvent, Mode 2 of conducting this reaction in a solvent that is low in relative dielectric constant, and Mode 3 of conducting this reaction in a halogenated hydrocarbon-series solvent. In each of these three modes, it is possible to produce the optically active, fluorine-containing carbonyl-ene product with low cost.
• US8278479B2
  申请人：——

  公开号：US8278479B2

  公开（公告）日：2012-10-02
• Stable Axial Chirality in Metal Complexes Bearing 4,4′-Substituted BIPHEPs: Application to Catalytic Asymmetric Carbon–Carbon Bond-Forming Reactions
  作者：Kohsuke Aikawa、Yoshitaka Miyazaki、Koichi Mikami

  DOI：10.1246/bcsj.20110309

  日期：2012.2.15

  Not only electronic but also steric effects of 4,4′-substituents in BIPHEP derivatives and metal (Pd, Pt, and Au) complexes are shown to influence the stability of the biphenyl single bond rotation. While electron-donating or sterically demanding substituents on the 4,4′-positions destabilize the axial chirality of BIPHEP derivatives, electron-withdrawing or sterically less demanding ones on the 4,4′-positions stabilize the axis chirality. Particularly, the axial chirality of palladium dichloride complexes bearing BIPHEP with t-Bu and CF3 substituents on the 4,4′-positions is most labile and stable, respectively (ΔG≠ = 29.22 and 30.49 kcal mol−1 at 300 K; t1/2 = 7 and 56 years at 300 K). These enantiopure dicationic BIPHEP–Pd complexes can be employed for catalytic enantioselective arylation, alkenylation, and ene reactions to give the corresponding products in good-to-excellent yields and enantioselectivities. Significantly, in the carbonyl-ene reaction of trifluoropyruvate with isobutene, the turnover frequency (TOF) reached 58200 h−1. The remarkable effects of 4,4′-substituents in BIPHEP derivatives can be employed as a guiding principle in the design of versatile and efficient ligands.

  不仅是电子效应，4,4′-取代基在BIPHEP衍生物及金属（Pd、Pt和Au）配合物中的空间效应也被证明会影响联苯单键旋转的稳定性。在4,4′-位置的电子供体或空间占位需求较大的取代基会使BIPHEP衍生物的轴向手性不稳定，而电子吸引或空间占位需求较小的取代基则会稳定轴向手性。特别是，带有t-Bu和CF3取代基的钯二氯化物配合物的轴向手性表现出最大的易变性和稳定性（在300 K时，ΔG≠ = 29.22和30.49 kcal mol−1；t1/2 = 7年和56年）。这些对映体纯的二阳离子BIPHEP–Pd配合物可用于催化对映选择性的芳烃化、烯烃化和烯反应，以良好至优异的产率和对映选择性生成相应的产品。重要的是，在三氟丙酮酸与异丁烯的羰基-烯反应中，周转频率（TOF）达到了58200 h−1。4,4′-取代基在BIPHEP衍生物中的显著影响可作为设计多用途高效配体的指导原则。