(S)-2-(4-methylphenoxy)propanoic acid | 13832-02-5

• 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: (S)-2-(4-methylphenoxy)propanoic acid
• 英文别名: (S)-2-(p-tolyloxy)propanoic acid；(2S)-2-(4-methylphenoxy)propanoic acid
• CAS: 13832-02-5
• 化学式: C₁₀H₁₂O₃
• mdl: MFCD02684121
• 分子量: 180.203
• InChiKey: BTQZPXFENISXER-QMMMGPOBSA-N

物化性质

• 沸点：
  302.7±17.0 °C(Predicted)
• 密度：
  1.142±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (S)-2-(4-methylphenoxy)propanoic acid 、 正丁醇 在 Candida rugosa lipase MY 、 水 作用下， 以 正己烷 为溶剂， 生成
  参考文献：
  名称：

  脂肪酶的灵活性如何影响其在有机溶剂中的对映选择性？CH···π缔合在酶-底物复合物稳定中的可能作用

  摘要：

  对于脂肪酶催化的 2-(4-取代苯氧基)丙酸与醇在含有少量水的有机溶剂中的反应，脂肪酶灵活性的增加带来了...

  DOI：

  10.1246/bcsj.77.543
• 作为产物：
  描述：

  butyl 2-(4-methylphenoxy)propanoate 在 Candida rugosa lipase type VII lyophilized from aqueous solution 、 水 作用下， 以 四氢呋喃 为溶剂， 生成 (S)-2-(4-methylphenoxy)propanoic acid
  参考文献：
  名称：

  使用共溶剂作为添加剂大大提高脂肪酶催化水解和酯化的对映选择性

  摘要：

  添加共溶剂如四氢呋喃导致脂肪酶催化的 2-(4-取代苯氧基)丙酸丁酯在缓冲水溶液中水解的对映选择性大大提高。另一方面，从含有共溶剂的水溶液中冻干的脂肪酶催化 2-（4-取代苯氧基）丙酸、2-（4-异丁基苯基）丙酸（布洛芬）和 2-（6 -甲氧基-2-萘基）丙酸（萘普生）在有机溶剂中。对于某些底物，观察到 E 值增加了两个数量级。由共溶剂添加引起的对映选择性增强的起源主要归因于错误结合的对映异构体的初始反应速率显着减慢，与正确结合的对映体相比。从FT-IR、CD和ESR光谱的结果来看，还发现共溶剂的加入导致脂肪酶三级结构的部分破坏。

  DOI：

  10.1246/bcsj.81.617

文献信息

• Microbial Deracemization of α-Substituted Carboxylic Acids:  Substrate Specificity and Mechanistic Investigation
  作者：Dai-ichiro Kato、Satoshi Mitsuda、Hiromichi Ohta

  DOI：10.1021/jo034253x

  日期：2003.9.1

  A new enzymatic method for the preparation of optically active alpha-substituted carboxylic acids is reported. This technique is called deracemization reaction, which provides us with a route to obtain the enantiomerically pure compounds, theoretically in 100% yield starting from the racemic mixture. This means that the synthesis of a racemate is almost equal to the synthesis of the optically active

  报道了一种用于制备旋光的α-取代的羧酸的新的酶促方法。这项技术称为脱硝反应，它为我们提供了从外消旋混合物开始，理论上以100％的收率获得对映体纯化合物的途径。这意味着外消旋体的合成几乎与旋光化合物的合成相同，并且该概念与不对称合成中通常被接受的概念完全不同。使用不断增长的诺卡氏夜蛾诺卡氏菌JCM3208的细胞系统，可以使2-芳基-和2-芳基氧基丙酸的外消旋物顺利脱硫，并以高化学收率（> 50％）回收富含（R）-形式的产物。此外，使用旋光性起始化合物和氘代衍生物以及抑制剂，
• Enantioselective Hydrolysis of Some 2-Aryloxyalkanoic Acid Methyl Esters and Isosteric Analogues Using a Penicillin G Acylase-Based HPLC Monolithic Silica Column
  作者：Gabriella Massolini、Enrica Calleri、Antonio Lavecchia、Fulvio Loiodice、Dieter Lubda、Caterina Temporini、Giuseppe Fracchiolla、Paolo Tortorella、Ettore Novellino、Gabriele Caccialanza

  DOI：10.1021/ac0204193

  日期：2003.2.1

  A technique based on liquid chromatography has been developed to facilitate studies of enantioselectivity in penicillin G acylase (PGA)-catalyzed hydrolysis of some 2-aryloxyalkanoic acid methyl esters and isosteric analogues. PGA was covalently immobilized on an aminopropyl monolithic silica support to create an immobilized HPLC-enzyme reactor. Two sets of experimental data were drawn to calculate the enantioselectivity (E) of the kinetically controlled enantiomer-differentiating reaction, the degree of substrate conversion and the enantiomeric excess of the product. The developed enzymatic reactor was coupled through a switching valve to an achiral analytical column for separation and quantitation of the hydrolysis products. The enantiomeric excess was determined off-line on a PGA-chiral stationary phase. In this way, highly precise E values were determined. A computational study related to the hydrolysis of the considered racemic esters was also carried out in order to unambiguously clarify both the substrate specificity and the enantioselectivity displayed by PGA.

  一种基于液相色谱的技术已被开发出来，以便于研究青霉素G酰化酶（PGA）催化某些2-芳氧烷基酸甲酯及其同效物的水解反应中的对映选择性。PGA被共价固定在氨丙基单体硅胶支撑物上，创建了一个固定化HPLC-酶反应器。通过两组实验数据，计算了动力学控制的对映体区分反应的对映选择性（E）、底物转化率以及产物的对映过量。所开发的酶反应器通过切换阀与无手性的分析柱连接，用于分离和定量水解产物。对映过量在线上通过PGA-手性固定相确定。通过这种方式，获得了高度精确的E值。此外，还进行了与所考虑的外消旋酯水解相关的计算研究，以明确PGA所表现出的底物特异性和对映选择性。
• Flexibility of Lipase Brought About by Solvent Effects Controls Its Enantioselectivity in Organic Media
  作者：Shin-ichi Ueji、Tomohiko Taniguchi、Takashi Okamoto、Keiichi Watanabe、Yasuhito Ebara、Hitoshi Ohta

  DOI：10.1246/bcsj.76.399

  日期：2003.2

  of the enantioselectivity of Candida rugosa lipase was investigated in the esterification of 2-(4-substituted phenoxy)propionic acids with 1-butanol in aliphatic, aromatic, and ethereal solvents. The observed enantioselectivity (E value) was greatly affected by the solvent nature. Two key solvent characteristics, dielectric constant (e) and hydrophobicity (log P), failed to explain the solvent effects

  2-（4-取代苯氧基）丙酸与 1-丁醇在脂肪族、芳香族和醚类溶剂中的酯化反应中研究了假丝酵母脂肪酶的对映选择性行为。观察到的对映选择性（E 值）受溶剂性质的影响很大。两个关键的溶剂特性，介电常数 (e) 和疏水性 (log P)，未能解释溶剂对 E 值的影响。另一方面，发现 E 值的变化与溶剂效应带来的脂肪酶灵活性成功相关，其灵活性是通过自旋标记脂肪酶的 ESR 测量来估计的。尽管有机化学家通常应该在生物催化不对称拆分中进行溶剂筛选步骤，
• PROTEASOME CHYMOTRYPSIN-LIKE INHIBITION USING PI-1833 ANALOGS
  申请人：H. Lee Moffitt Cancer Center and Research Institute, Inc

  公开号：US20140073650A1

  公开（公告）日：2014-03-13

  Focused library synthesis and medicinal chemistry on an oxadiazole-isopropylamide core proteasome inhibitor provided the lead compound that strongly inhibits CT-L activity. Structure activity relationship studies indicate the amide moiety and two phenyl rings are sensitive toward synthetic modifications. Only para-substitution in the A-ring was important to maintain potent CT-L inhibitory activity. Hydrophobic residues in the A-ring's para-position and meta-pyridyl group at the B-ring significantly improved inhibition. The meta-pyridyl moiety improved cell permeability. The length of the aliphatic chain at the para position of the A-ring is critical with propyl yielding the most potent inhibitor, whereas shorter (i.e. ethyl, methyl or hydrogen) or longer (i.e. butyl, propyl and hexyl) chains demonstrating progressively less potency. Introduction of a stereogenic center next to the ether moiety (i.e. substitution of one of the hydrogens by methyl) demonstrated chiral discrimination in proteasome CT-L activity inhibition (the S-enantiomer was 35-40 fold more potent than the R-enantiomer).

  聚焦于氧代二唑-异丙酰胺核心蛋白酶体抑制剂的合成和药物化学，提供了一种强烈抑制CT-L活性的先导化合物。结构活性关系研究表明，酰胺基团和两个苯环对合成修饰非常敏感。只有在A环上的对位取代对维持强效的CT-L抑制活性至关重要。A环对位的疏水基团和B环的间吡啶基团显著提高了抑制作用。间吡啶基团提高了细胞渗透性。A环对位的脂肪链长度是关键，丙基产生了最有效的抑制剂，而较短（即乙基，甲基或氢）或较长（即丁基，异丙基和己基）的链逐渐表现出较少的效力。在醚基团旁引入一个立体异构中心（即将一个氢原子取代为甲基）表明在蛋白酶体CT-L活性抑制中具有手性歧视（S-对映体比R-对映体更有效，效力提高了35-40倍）。
• Method of modifying taste
  申请人：TATE & LYLE PUBLIC LIMITED COMPANY

  公开号：EP0159864A2

  公开（公告）日：1985-10-30

  The sweetness of an ingestible product or oral composition containing a sweetening sugar or sugar alcohol in relatively large quantities can be reduced and/or the flavour enhanced by incorporation of at least one compound of the general formula (I) in which m represents 0 or 1, A represents a homocyclic or heterocyclic aromatic group with one or more rings; and B represents a hydrogen atom, a lower aliphatic group with 1-3 carbon atoms or a phenyl group; or, when m represents 0, A and B together represent a bivalent homocyclic or heterocyclic aromatic group with two or more rings, or a methylidene group carrying as a substituent a homocyclic or heterocyclic aromatic group with one or more rings; an aromatic ring of A, or of A and B together, optionally carrying one to three substituents selected from lower alkoxy groups, lower alkyl alkenyl groups, formyl or acetyl groups, hydroxy groups or acyloxy groups, and halogen atoms; C represents a hydrogen atom or an alkyl group or, when m represents 0, a hydroxy or alkoxy group; D represents an oxygen or sulphur atom; X+ represents a hydrogen ion or another physiologically compatible cation; with the proviso that m represents 1 when S represents a substituted or unsubstituted phenyl group and Band C both represent hydrogen atoms; or when A represents an unsubstituted phenyl group, B represents an alkyl group and C represents a hydrogen atom.

  通过加入至少一种通式(I)化合物，可降低含有相对大量甜味剂糖或糖醇的可食用产品或口服组合物的甜度和/或增强其风味 其中，m 代表 0 或 1，A 代表具有一个或多个环的均环或杂环芳香基团；B 代表氢原子、具有 1-3 个碳原子的低级脂肪族基团或苯基；或者，当 m 代表 0 时，A 和 B 共同代表具有两个或多个环的二价均环或杂环芳香基团，或者代表以具有一个或多个环的均环或杂环芳香基团为取代基的亚甲基；A 的芳香环，或 A 和 B 的芳香环，可选择带有一至三个取代基，这些取代基选 自低级烷氧基、低级烷基烯基、甲酰基或乙酰基、羟基或酰氧基以及卤素原子； C 代表氢原子或烷基，或当 m 代表 0 时，代表羟基或烷氧基； D 代表氧原子或硫原子； X+ 代表氢离子或其他生理上相容的阳离子； 但当 S 代表取代或未取代的苯基且带 C 均代表氢原子时，或当 A 代表未取代的苯基，B 代表烷基且 C 代表氢原子时，m 代表 1。