亞苄乳酸 | 2050-18-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂醇
• 中文名称: 亞苄乳酸
• 英文名称: 4-phenyl-2-hydroxy-3,4-butenoic acid
• 英文别名: Benzallactic acid；2-hydroxy-4-phenylbut-3-enoic acid
• CAS: 2050-18-2
• 化学式: C₁₀H₁₀O₃
• 分子量: 178.188
• InChiKey: ZGGWKQRHPWUSNY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  57.5
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  亞苄乳酸 在 tris(dibenzylideneacetone)dipalladium(0) chloroform complex 、 (S)-2-(3-(3,5-bis(trifluoromethyl)phenyl)ureido)-2-phenylethyl 2-(diphenylphosphanyl)benzoate 、 potassium carbonate 作用下， 以 四氢呋喃 为溶剂， 反应 24.0h， 生成 (2S,4S)-3-phenyl-4-((E)-styryl)-1,2,3-oxathiazolidine 2-oxide
  参考文献：
  名称：

  钯催化不对称[3+2]环化合成S(IV)-立体手性硫代恶唑烷酮

  摘要：

  公开了两种Pd催化的不对称[3+2]环化，为手性硫代恶唑烷酮的对映选择性合成提供了模块化平台。进行初步机制研究以使观察到的对映体和非对映体控制合理化。

  DOI：

  10.1002/anie.202319728
• 作为产物：
  描述：

  1,1,1-三氯-4-苯基-丁-3-烯-2-醇 在 sodium hydroxide 作用下， 以 氯仿 、 水 为溶剂， 反应 0.67h， 生成 亞苄乳酸
  参考文献：
  名称：

  Decomposition of Sodium Trichloroacetate in the Presence of Quaternary Ammonium under Microwave Irradiation: A Convenient One‐Pot Synthesis of α‐Hydroxy Acids in Water

  摘要：

  DOI：

  10.1080/00397910600781091

文献信息

• Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity
  作者：Shiue-Shien Weng、Hsin-Chun Li、Teng-Mao Yang

  DOI：10.1039/c2ra23068b

  日期：——

  direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficiently catalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl

  使用可逆的共价结合策略开发了一种新的，直接的和化学选择性的α-羟基酸酯化方法。通过利用缩醛化学，可以使用简单的醛在等于或超过醇的量的β-羟基酸部分或其他羧酸的存在下有效地催化α-羟基羧酸的酯化。用10 mol％廉价的市售水杨醛催化的1°和2°醇将各种α-芳基，α-烷基，α-杂芳基和官能化的α-羟基酸平稳地酯化，从而在83-在简单的碱性水溶液处理中除去未反应的羟基酸后，产率为95％。此外，水杨醛可通过真空蒸馏或硅胶纯化回收，从而达到绿色化学标准。机理研究证明，共价加合物的形成III在我们建议的催化循环中（方案1A）负责真正的催化作用。
• Engineering the Promiscuous Racemase Activity of an Arylmalonate Decarboxylase
  作者：Robert Kourist、Yusuke Miyauchi、Daisuke Uemura、Kenji Miyamoto

  DOI：10.1002/chem.201001924

  日期：2011.1.10

  Variant G74C of arylmalonate decarboxylase (AMDase) from Bordatella bronchoseptica has a unique racemising activity towards profens. By protein engineering, variant G74C/V43A with a 20‐fold shift towards promiscuous racemisation was obtained, based on a reduced activity in the decarboxylation reaction and a two‐fold increase in the racemisation activity. The mutant showed an extended substrate range

  支气管败血波氏杆菌中的芳基丙二酸脱羧酶（AMDase）G74C变体对profens具有独特的消旋作用。通过蛋白质工程，基于脱羧反应的活性降低和消旋活性的两倍提高，获得了向混杂消旋化20倍的变体G74C / V43A。该突变体显示出扩大的底物范围，对酮洛芬的反应速率提高了30倍。分子动力学模拟和消旋酶的底物特征表明，底物结构的空间和极性效应在催化方面比单纯的动力学α-质子酸度起着更大的作用。β，γ-不饱和羧酸的转化不会导致重排形成其α，β异构体的观察结果表明，这是一个协调的机制，而不是逐步的机制。有趣的是，
• Lipase activity of Lecitase® Ultra: characterization and applications in enantioselective reactions
  作者：Mithilesh Kumar Mishra、Thenkrishnan Kumaraguru、Gurrala Sheelu、Nitin W. Fadnavis

  DOI：10.1016/j.tetasy.2009.11.012

  日期：2009.12

  The general properties of Lecitase (R) Ultra, a phospholipase manufactured and marketed by Novozymes, Denmark, have been studied after purification by ultrafiltration. The enzyme has a molecular mass of 35 KD, pH-optimum of 8.5, and appears to possess a single active site which exhibits both the lipase and phospholipase activities that increase in the presence of Ca2+ and Mg2+ ions. The enzyme is inhibited by heavy metal ions and surfactants, and does not accept p-nitrophenyl acetate and glycerol triacetate. Substrates, such as glycerol tributyrate and p-nitrophenyl palmitate, esters of N-acetyl-alpha-amino acids and alpha-hydroxy acids are readily accepted. Amino acids with aliphatic residues, such as alanine, isoleucine, and methionine, are hydrolyzed with high enantioselectivity for the L-enantiomer (E > 100), but amino acids with aromatic residues such as phenylalanine and phenylglycine, and esters of alpha-hydroxy acids are hydrolyzed with low enantioselectivity (E = 1-5). Immobilization of the enzyme in a gelatin matrix (gelozyme) leads to a marginal improvement in the enantioselectivity for these substrates. However, a dramatic improvement in enantioselectivity is observed for ethyl 2-hydroxy-4-oxo-4-phenylbutyrate (E value increases from 4.5 to 19.5 with S-selectivity). Similarly, glycidate esters, such as ethyl trans-(+/-)-3-phenyl glycidate and methyl trans-(+/-)-3-(4-methoxyphenyl) glycidate, are selectively hydrolyzed with a remarkable selectivity towards the (2S,3R)-enantiomer providing unreacted (2R,3S)-glycidate esters (ee >99%, conversion 52-55%) by the immobilized enzyme. (C) 2009 Elsevier Ltd. All rights reserved.