3-氧代-4-苯基丁酸苄酯 | 62282-32-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 3-氧代-4-苯基丁酸苄酯
• 英文名称: benzyl 3-oxo-4-phenylbutanoate
• CAS: 62282-32-0
• 化学式: C₁₇H₁₆O₃
• 分子量: 268.312
• InChiKey: BMQBHUXGEPEHBJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  20
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.18
• 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：

  3-氧代-4-苯基丁酸苄酯 在 5% Pd/C 、 2-(trimethylsilyl)ethyl 4-(biphenyl-4-yl)-3-oxobutanoate 、 氢气 、 三乙胺 作用下， 以 乙酸乙酯 为溶剂， 20.0 ℃ 、100.0 kPa 条件下， 反应 9.0h， 以95%的产率得到苯基丙酮
  参考文献：
  名称：

  衍生自 2-(三甲基甲硅烷基)乙醇的 β-酮酯：β-酮酯的正交保护基团

  摘要：

  衍生自 2-(三甲基甲硅烷基)乙醇的 β-酮酯在 50 °C 下在四氢呋喃中用 0.75 当量的四丁基氟化铵三水合物处理时会发生裂解和脱羧，而衍生自甲醇、叔丁醇、烯丙醇或苯甲醇保持原样。相反，甲基-、叔-丁基-、烯丙基-或苄基P-酮酯可以被裂解和脱羧，而2-(三甲基甲硅烷基)乙基P-酮酯不受影响。类似地，由 2-(三甲基甲硅烷基) 乙醇和甲醇、叔丁醇、烯丙醇或苯甲醇衍生的混合双 (β-酮酯) 可以在相同的反应条件下进行化学选择性去功能化。

  DOI：

  10.1055/s-2008-1067157
• 作为产物：
  描述：

  benzyl 4-phenylbuta-2,3-dienoate 在 Oxone 作用下， 以 水 、 N,N-二甲基甲酰胺 为溶剂， 以54%的产率得到3-氧代-4-苯基丁酸苄酯
  参考文献：
  名称：

  Oxone-promoted hydration of electron-deficient allenic esters and ketones into 1,3-dicarbonyl compounds

  摘要：

  A novel and mild protocol for the hydration of electron-deficient allenic esters and ketones into various 1,3-dicarbonyl compounds is described. The hydration of allenes promoted by oxone in DMF afforded the corresponding products in moderate to good yields. This work features the employment of only a catalytic amount of inexpensive and nontoxic solid reagent oxone (2KHSO(5)center dot KHSO4 center dot K2SO4), avoiding the utility of toxic metals or traditional Bronsted acids, in a green version of viewpoint. A possible reaction mechanism for this transformation is also primarily proposed. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2015.05.120

文献信息

• Non-metal Lewis acid-catalyzed cross-Claisen condensation for β-keto esters
  作者：Tianyu Zhang、Zhenkun Yang、Dapeng Zhou、Fuliang Meng、Zhengyu Han、Hai Huang

  DOI：10.1039/d1ob01785c

  日期：——

  In this work, we disclose a new catalytic and highly chemoselective cross-Claisen condensation of esters. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles

  在这项工作中，我们公开了一种新的催化和高度化学选择性的酯交叉克莱森缩合。在作为非金属路易斯酸的 TBSNTf 2存在下，各种酯可以进行交叉克莱森缩合以形成β-酮酯，这是重要的结构单元。与传统的克莱森缩合相比，该工艺以甲硅烷基乙烯酮缩醛（SKAs）为含碳亲核试剂实现交叉克莱森缩合，条件温和，官能团耐受性好。
• Asymmetric synthesis of 1H-pyrrol-3(2H)-ones from 2,3-diketoesters by combination of aldol condensation with benzilic acid rearrangement
  作者：Qiang Sha、Hadi Arman、Michael P. Doyle

  DOI：10.1039/c5cc07780j

  日期：——

  An efficient two-step protocol for the asymmetric synthesis of 1H-pyrrol-3(2H)-one derivatives in 99% ee from conveniently accessed 2,3-diketoesters has been developed.

  开发了一种有效的两步方案，用于从方便获得的 2,3-二酮酯中不对称合成 99% ee 的 1H-吡咯-3(2H)-one 衍生物。
• Carboxylic acid derivatives as IP antagonists
  申请人：——

  公开号：US20010056100A1

  公开（公告）日：2001-12-27

  This invention relates to compounds which are generally IP receptor antagonists and which are represented by Formula I: 1 wherein: R 1 , R 2 , and R 3 are each independently in each occurrence aryl or heteroaryl; R 4 is —COOH or tetrazolyl; A, B, m, n, and r are as defined in the specification; or individual isomers, racemic or non-racemic mixtures of isomers, or pharmaceutically acceptable salts or solvates thereof. The invention further relates to pharmaceutical compositions containing such compounds, methods for their use as therapeutic agents, and processes for their preparation.

  这项发明涉及一类通常为IP受体拮抗剂的化合物，其由以下式I表示： 其中： R1、R2和R3在每次出现时各自独立地为芳基或杂环芳基； R4为—COOH或四唑基； A、B、m、n和r如规范中定义； 或其各个异构体、外消旋或非外消旋异构体混合物，或其药用可接受盐或溶剂合物。该发明还涉及含有这种化合物的药物组合物，以及将其用作治疗剂的方法和其制备方法。
• A Stereoselective and Practical Synthesis of (E)-α,β-Unsaturated Ketones from Aldehydes
  作者：Evita Balducci、Emanuele Attolino、Maurizio Taddei

  DOI：10.1002/ejoc.201001182

  日期：2011.1

  α,β-Unsaturated ketones can be prepared by reaction of differently substituted β-keto acids and aldehydes. The reaction is carried out under organocatalysis (β-alanine, 0.5 equiv.) and generates the enones with high E selectivity (>95 %). This version of the Verley–Doebner modification of the Knoevenagel reaction is a practical alternative to the classic Horner–Wadsworth–Emmons (HWE) reaction without

  α,β-不饱和酮可以通过不同取代的β-酮酸和醛反应制备。该反应在有机催化（β-丙氨酸，0.5 当量）下进行，并生成具有高 E 选择性（> 95 %）的烯酮。这个版本的 Knoevenagel 反应的 Verley-Doebner 修饰是经典 Horner-Wadsworth-Emmons (HWE) 反应的实用替代方案，不会形成高分子量副产物。该过程使用简单的试剂，可在符合原子经济原理的条件下应用于大规模合成。可以制备不同取代的脂肪族、芳香族或杂芳香族 α,β-不饱和酮。还描述了加氢甲酰化/Verley-Doebner Knoevenagel 伸缩过程的一个例子。
• Nuclear analogs of β-lactam antibiotics. II. Synthesis of <i>O</i>-2-isocephems
  作者：Terrence W. Doyle、Bernard Belleau、Bing-Yu Luh、Terry Thomas Conway、Marcel Menard、James L. Douglas、Daniel Tim-Wu Chu、Gary Lim、Leeson R. Morris、Pierre Rivest、Michael Casey

  DOI：10.1139/v77-070

  日期：1977.2.1

  The preparation by total synthesis of a new class of β-lactam antibiotics is reported. Conversion of alcohol 1b to its mesylate 9b followed by hydrolysis of the acetal to the enol 1b and base-catalyzed ring closure gave benzyl 7- β-azido-Δ³-O-2-isocephem-4-carboxylate 8b. Similarly prepared were the 3 -methyl, 3 -benzyl, and 3 -phenethyl analogs (32b–d). Reduction of the azides followed by coupling of the resultant amines with phenoxyacetic acid and removal of the benzyl groups by hydrogenolysis gave the acids 35a–e which exhibited high antibacterial activity. The structural assignments to the O-2-isocephems which were made on the basis of their spectral characteristics (ir, uv, and nmr) are discussed.

  报道了一种新类β-内酰胺类抗生素的全合成制备。将醇1b转化为其甲磺酸酯9b，随后水解缩醛为烯醇1b，并经过碱催化的环闭合得到苄基7-β-叠氮-Δ3-O-2-异头孢-4-羧酸酯8b。类似地制备了3-甲基、3-苄基和3-苯乙基类似物（32b–d）。还原叠氮基后，将产生的胺与苯氧乙酸偶联，并通过氢解去除苄基，得到表现出高抗菌活性的酸35a–e。基于它们的光谱特性（红外光谱、紫外光谱和核磁共振）对O-2-异头孢的结构分配进行了讨论。