tert-butyl 4-(4-chlorophenyl)-2-oxobutanoate | 645413-92-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: tert-butyl 4-(4-chlorophenyl)-2-oxobutanoate
• CAS: 645413-92-9
• 化学式: C₁₄H₁₇ClO₃
• 分子量: 268.74
• InChiKey: KFMWYMRJLZCXPF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 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：

  tert-butyl 4-(4-chlorophenyl)-2-oxobutanoate 在 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 以100%的产率得到4-(对氯苯基)-2-氧代丁酸
  参考文献：
  名称：

  Structure–Activity Relationship Studies of α-Ketoamides as Inhibitors of the Phospholipase A and Acyltransferase Enzyme Family

  摘要：

  The phospholipase A and acyltransferase (PLAAT) family of cysteine hydrolases consists of five members, which are involved in the Ca2+-independent production of N-acylphosphatidylethanolamines (NAPEs). NAPEs are lipid precursors for bioactive N-acylethanolamines (NAEs) that are involved in various physiological processes such as food intake, pain, inflammation, stress, and anxiety. Recently, we identified alpha-ketoamides as the first pan-active PLAAT inhibitor scaffold that reduced arachidonic acid levels in PLAAT3-overexpressing U2OS cells and in HepG2 cells. Here, we report the structure-activity relationships of the alpha-ketoamide series using activity-based protein profiling. This led to the identification of LEI-301, a nanomolar potent inhibitor for the PLAAT family members. LEI-301 reduced the NAE levels, including anandamide, in cells overexpressing PLAAT2 or PLAAT5. Collectively, LEI-301 may help to dissect the physiological role of the PLAATs.

  DOI：

  10.1021/acs.jmedchem.0c00522
• 作为产物：
  描述：

  4-氯苯乙基溴化物 在 碘 、 magnesium 作用下， 以 乙醚 为溶剂， 反应 3.0h， 生成 tert-butyl 4-(4-chlorophenyl)-2-oxobutanoate
  参考文献：
  名称：

  Structure–Activity Relationship Studies of α-Ketoamides as Inhibitors of the Phospholipase A and Acyltransferase Enzyme Family

  摘要：

  The phospholipase A and acyltransferase (PLAAT) family of cysteine hydrolases consists of five members, which are involved in the Ca2+-independent production of N-acylphosphatidylethanolamines (NAPEs). NAPEs are lipid precursors for bioactive N-acylethanolamines (NAEs) that are involved in various physiological processes such as food intake, pain, inflammation, stress, and anxiety. Recently, we identified alpha-ketoamides as the first pan-active PLAAT inhibitor scaffold that reduced arachidonic acid levels in PLAAT3-overexpressing U2OS cells and in HepG2 cells. Here, we report the structure-activity relationships of the alpha-ketoamide series using activity-based protein profiling. This led to the identification of LEI-301, a nanomolar potent inhibitor for the PLAAT family members. LEI-301 reduced the NAE levels, including anandamide, in cells overexpressing PLAAT2 or PLAAT5. Collectively, LEI-301 may help to dissect the physiological role of the PLAATs.

  DOI：

  10.1021/acs.jmedchem.0c00522

文献信息

• Dynamics in Catalytic Asymmetric Diastereoconvergent (3 + 2) Cycloadditions with Isomerizable Nitrones and α-Keto Ester Enolates
  作者：Tetsuya Ezawa、Yoshihiro Sohtome、Daisuke Hashizume、Masaya Adachi、Mai Akakabe、Hiroyuki Koshino、Mikiko Sodeoka

  DOI：10.1021/jacs.1c02833

  日期：2021.6.23

  Reaction design in asymmetric catalysis has traditionally been predicated on a structurally robust scaffold in both substrates and catalysts, to reduce the number of possible diastereomeric transition states. Herein, we present the stereochemical dynamics in the Ni(II)-catalyzed diastereoconvergent (3 + 2) cycloadditions of isomerizable nitrile-conjugated nitrones with α-keto ester enolates. Even in

  传统上，不对称催化中的反应设计基于底物和催化剂中结构坚固的支架，以减少可能的非对映异构过渡态的数量。在此，我们展示了 Ni(II) 催化的非对映会聚 (3 + 2) 环加成反应中的可异构化腈共轭硝酮与 α-酮酯烯醇化物的立体化学动力学。即使在存在多个平衡物种的情况下，催化协议也显示出广泛的底物范围，以访问一系列带有相邻立体中心的含 CN 构建块，具有高对映选择性和非对映选择性。我们的计算研究表明，在去质子化过程中形成 ( Z )-Ni-烯醇化物的过程中控制了对映选择性，而独特的合成 添加主要由硝酮和配体之间的弱非共价键相互作用控制。
• Asymmetric Synthesis of Diverse Glycolic Acid Scaffolds via Dynamic Kinetic Resolution of α-Keto Esters
  作者：Kimberly M. Steward、Michael T. Corbett、C. Guy Goodman、Jeffrey S. Johnson

  DOI：10.1021/ja3102709

  日期：2012.12.12

  The dynamic kinetic resolution of α-keto esters via asymmetric transfer hydrogenation has been developed as a technique for the highly stereoselective construction of structurally diverse β-substituted-α-hydroxy carboxylic acid derivatives. Through the development of a privileged m-terphenylsulfonamide for (arene)RuCl(monosulfonamide) complexes with a high affinity for selective α-keto ester reduction

  通过不对称转移氢化进行α-酮酯的动态动力学拆分已被开发为一种用于高度立体选择性构建结构多样的β-取代-α-羟基羧酸衍生物的技术。通过开发用于（芳烃）RuCl（单磺酰胺）配合物的特殊间三联苯磺酰胺，对选择性 α-酮酯还原具有高亲和力，可以在 β- 还原过程中实现优异水平的化学、非对映和对映控制。芳基-和β-氯-α-酮酯。
• Catalytic Asymmetric Mono-Fluorination of α-Keto Esters: Synthesis of Optically Active β-Fluoro-α-Hydroxy and β-Fluoro-α-Amino Acid Derivatives
  作者：Shoko Suzuki、Yuki Kitamura、Sylvain Lectard、Yoshitaka Hamashima、Mikiko Sodeoka

  DOI：10.1002/anie.201201303

  日期：2012.5.7

  Enantioselective mono‐fluorination of α‐keto esters was achieved using a mildly basic palladium μ‐hydroxo complex as catalyst. Subsequent one‐pot reduction afforded optically active β‐fluoro‐α‐hydroxy esters. These compounds were then converted into β‐fluoro‐α‐amino esters, which are potentially useful in medicinal chemistry research.

  α-酮酸酯的对映选择性单氟化是通过使用温和碱性的钯μ-羟基络合物作为催化剂来实现的。随后的一锅还原得到旋光的β-氟-α-羟基酯。然后将这些化合物转化为β-氟-α-氨基酯，这可能在药物化学研究中有用。
• Nickel(II)‐Catalyzed Diastereo‐ and Enantioselective Michael/ Hemiacetalization Cascade Reaction of α‐Ketoesters with 2‐(2‐Nitrovinyl)phenols
  作者：Long Chen、Wu‐Lin Yang、Jia‐Huan Shen、Wei‐Ping Deng

  DOI：10.1002/adsc.201900753

  日期：2019.10.8

  A nickel(II)/diamine‐catalyzed diastereo‐ and enantioselective Michael/hemiacetalization cascade reaction of α‐ketoesters with 2‐(2‐nitrovinyl)phenols has been established, thus providing a range of structurally diverse polysubstituted chromanes in good yields and excellent stereoselectivities (up to 89% yield, >20:1 dr, >99% ee). Moreover, the gram‐scale experiment was performed with only 0.5 mol%

  建立了镍（II）/二胺催化的α-酮酸酯与2-（2-硝基乙烯基）苯酚的非对映选择性和对映选择性迈克尔/半缩醛化级联反应，从而以良好的收率和出色的立体选择性提供了一系列结构多样的多取代的苯并二氢吡喃。 （产率高达89％，dr> 20：1，ee大于99％）。此外，仅用0.5 mol％的催化剂进行了克级实验，产物的衍生化得到了三环呋喃并苯并二氢吡喃化合物，显示出该策略的巨大合成潜力。
• Water enables an asymmetric cross reaction of α-keto acids with α-keto esters for the synthesis of quaternary isotetronic acids
  作者：Ping Chen、Kai Wang、Boyu Zhang、Wengang Guo、Yan Liu、Can Li

  DOI：10.1039/c9cc06356k

  日期：——

  A water promoted asymmetric aldol/lactonization/enolization cascade reaction of α-keto acids and α-keto esters was developed, affording the first general protocol for the construction of chiral quaternary isotetronic acids with excellent enantioselectivity. Theoretical results indicate that intramolecular ionized enamine intermediates stabilized by water generate zwitterionic transition states in a

  开发了水促进的α-酮酸和α-酮酯的不对称羟醛/内酯化/烯醇化级联反应，为构造手性季戊四烯异四酸具有良好的对映选择性提供了第一个通用方案。理论结果表明，用水稳定的分子内离子化烯胺中间体在较低的活化能和较高的面部选择性下产生两性离子过渡态，从而导致较高的活性以及化学和对映体选择性。