L-天冬氨酸 4-乙酯 | 4070-43-3

• 物质功能分类: 有机原料 - 羧酸类化合物及衍生物
• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 中文名称: L-天冬氨酸 4-乙酯
• 中文别名: 天冬氨酸乙酯；L-天冬氨酸4-乙酯
• 英文名称: L-Asparaginsaeure-β-ethylester
• 英文别名: (2S)-2-azaniumyl-4-ethoxy-4-oxobutanoate
• CAS: 4070-43-3
• 化学式: C₆H₁₁NO₄
• 分子量: 161.158
• InChiKey: KALSWOYBXAHEKF-BYPYZUCNSA-N

物化性质

• 熔点：
  200 °C (decomp)
• 沸点：
  310.8±37.0 °C(Predicted)
• 密度：
  1.242±0.06 g/cm3(Predicted)
• LogP：
  0.597 (est)

计算性质

• 辛醇/水分配系数(LogP)：
  -2.1
• 重原子数：
  11
• 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：
  89.6
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  L-天冬氨酸 4-乙酯 在 sodium hydroxide 作用下， 生成 β-Ethyl-N-acetyl-L-aspartyl-L-seryl-amid
  参考文献：
  名称：

  Co-operative Effects of Functional Groups in Peptides. I. Aspartyl-serine Derivatives

  摘要：

  DOI：

  10.1021/ja00871a030
• 作为产物：
  描述：

  benzyl (3S,5R,6S)-3-(2-ethoxy-2-oxoethyl)-2-oxo-5,6-diphenylmorpholine-4-carboxylate 在 钯 氢气 作用下， 以 乙醇 为溶剂， 生成 L-天冬氨酸 4-乙酯
  参考文献：
  名称：

  α-氨基酸的不对称合成：N-BOC-5、6-二苯基-2,3,5,6-四氢-4h-1,4-恶嗪-2-酮的烯醇盐与阳离子官能化的比较

  摘要：

  手性甘氨酸盐1和2的烯醇盐生成和随后的烷基化以高度非对映选择性发生。减少同源产物（3和4）提供了高对映体过量，Nt-BOC和游离α-氨基酸衍生物5和6。

  DOI：

  10.1016/s0040-4039(00)82268-6

文献信息

• COMPOUNDS FOR THE TREATMENT OF DISEASES ASSOCIATED WITH THE FORMATION OF AMYLOID FIBRILS
  申请人：Innovaprotean, S.L.

  公开号：EP1679299A1

  公开（公告）日：2006-07-12

  SUMMARY The present invention provides new amyloidogenesis inhibiting compounds of formula (I): in which R1 is a -NRaRb group, where Ra and Rb, independently, are a hydrogen atom or a C1-C6 alkyl group; -ORc group, where Rc is a hydrogen atom or a C1-C6 alkyl group; a glycosyl; a C1-C6 polyhydroxyalkyl; or a -NH-CH(Rd)-COORe group, where Rd is a side chain of one of the 20 natural alpha-amino acids in either of their two enantiomerically pure forms L or D, and Re is a hydrogen atom or a C1-C6 alkyl group; and R2 is a hydrogen atom, a C1-C6 alkyl group, a glycosyl; a C1-C6 polyhydroxyalkyl; -C(=O)-Rf group, where Rf is a C1-C6 alkyl group; or a -CH2-COO-Rg group, where Rg is a hydrogen atom or a C1-C6 alkyl group; and pharmaceutically acceptable salts thereof, which are useful in the treatment of neurodegenerative diseases, among others.

  本发明提供了新的抑制淀粉样生成的化合物，其化学式为（I）：其中R1是一个-NRaRb基团，其中Ra和Rb独立地是氢原子或C1-C6烷基基团；-ORc基团，其中Rc是氢原子或C1-C6烷基基团；一种糖基；一种C1-C6多羟基烷基；或者一个-NH-CH（Rd）-COORe基团，其中Rd是20种天然α-氨基酸之一的侧链，以其两种对映纯形式L或D之一存在，Re是氢原子或C1-C6烷基基团；和R2是氢原子，C1-C6烷基基团，糖基；C1-C6多羟基烷基；-C（=O）-Rf基团，其中Rf是C1-C6烷基基团；或者-CH2-COO-Rg基团，其中Rg是氢原子或C1-C6烷基基团；以及其药学上可接受的盐，这些化合物在治疗神经退行性疾病等方面是有用的。
• Influence of Alkylamides of Glutamic Acid and Related Compounds on the Central Nervous System. II. Syntheses of Amides of Glutamic Acid and Related Compounds, and Their Effects on the Central Nervous System
  作者：RYOHEI KIMURA、TOSHIRO MURATA

  DOI：10.1248/cpb.19.1301

  日期：——

  Eleven kinds of 5-alkylamides of L-and DL-glutamic acid were synthesized and assessed for anticonvulsant effects. Against lethal convulsion induced by caffeine, maximum efficacy was observed with alkylamides possessing C7 to C8 alkyl radicals in the position 5 of glutamic acid, and the compounds having C5 to C7 alkyl groups were shown to have the highest toxity. Differences in the response between L-compound and DL-compound are not significant. Synthesized ω-alkylamides of L-glutamic acid, L-aspartic acid and DL-2-aminoadipic acid did neither increase nor decrease the oxygen consumption by the rat brain cortex slices.

  合成了十一种L-和DL-谷氨酸的5-烷基酰胺，并评估了其抗癫痫效果。在咖啡因诱导的致命性抽搐中，观察到具有C7至C8烷基基团的烷基酰胺在谷氨酸的5位具有最大的效能，而具有C5至C7烷基的化合物显示出最高的毒性。L-化合物和DL-化合物之间的反应差异并不显著。合成的L-谷氨酸、L-天冬氨酸和DL-2-氨基己二酸的ω-烷基酰胺既没有增加也没有减少大鼠脑皮层切片的氧气消耗。
• N-transfer reagent and method for preparing the same and its application
  申请人：NATIONAL CHENG KUNG UNIVERSITY

  公开号：US11040939B1

  公开（公告）日：2021-06-22

  Provided are a novel N-transfer reagent and a method for preparing the same and its application. The N-transfer reagent is represented by the following Formula (I): The various novel N-transfer reagents of the present invention can be quickly prepared by employing different nitrobenzene precursors. The N-transfer reagents can directly convert a variety of amino compounds into diazo compounds under mild conditions. Particularly, the N-transfer reagents can facilitate the synthesis of the diazo compounds. The application of synthesizing diazo compounds of the present invention can greatly decrease the difficulty in operation, increase the safety during experiments, reduce the cost of production and the environmental pollution, and enhance the industrial value of diazo compounds.

  提供了一种新颖的N-转移试剂及其制备方法和应用。N-转移试剂由以下式（I）表示：本发明的各种新颖N-转移试剂可以通过采用不同的硝基苯前体快速制备。在温和条件下，N-转移试剂可以直接将各种氨基化合物转化为重氮化合物。特别地，N-转移试剂可以促进重氮化合物的合成。本发明用于合成重氮化合物的应用可以大大降低操作难度，增加实验安全性，减少生产成本和环境污染，提高重氮化合物的工业价值。
• A Simple and Convenient Synthesis of β-Aspartates and γ-Glutamates
  作者：Rainer Albert、Johann Danklmaier、Helmut Hönig、Harald Kandolf

  DOI：10.1055/s-1987-28030

  日期：——

  A simple and convenient, high yield synthesis of ω-esters of aspartic as well as glutamic acid has been developed, using tetrafluoroboric acid as catalyst. 13C-NMR data of the products are given.

  以四氟硼酸为催化剂，开发了一种简单方便、高产率的天冬氨酸和谷氨酸Ï酯合成方法。文中给出了产品的 13C-NMR 数据。
• SWITCHING FLUORESCENT NANOPARTICLE PROBE AND FLUORESCENT PARTICLE IMAGING METHOD USING SAME
  申请人：Hara Isao

  公开号：US20130149252A1

  公开（公告）日：2013-06-13

  The present invention provides a novel fluorescent nanoparticle imaging probe having a switching function (a function to quench a fluorescent dye during nanoparticle preparation, and emit fluorescence during imaging). A switching fluorescent nanoparticle probe comprising: a molecular assembly composed of an amphiphilic block polymer having a hydrophilic block chain and a hydrophobic block chain; and a fluorescent dye encapsulated in the molecular assembly, wherein (a) the hydrophilic block chain comprises, as an essential hydrophilic structural unit, a unit selected from a sarcosine unit and an alkylene oxide unit, (b) the hydrophobic block chain comprises, as an essential hydrophobic structural unit, a unit selected from the group consisting of an amino acid unit and a hydroxylic acid unit, and (c) the fluorescent dye is a cyanine compound represented by the formula (I): and two or more molecules of the fluorescent dye are encapsulated in the single molecular assembly.

  本发明提供一种新型荧光纳米颗粒成像探针，具有切换功能（在纳米颗粒制备过程中熄灭荧光染料，并在成像过程中发射荧光）。一种切换荧光纳米颗粒探针包括：由具有亲水性块链和疏水性块链的两性块聚合物组成的分子组装体；以及封装在分子组装体中的荧光染料，其中（a）亲水性块链包括作为必要亲水性结构单元的一种选自肌氨酸单元和烷氧基单元的单元，（b）疏水性块链包括作为必要疏水性结构单元的一种选自氨基酸单元和羟基酸单元的单元，（c）荧光染料是由式（I）表示的青菁化合物：并且两个或更多分子的荧光染料被封装在单个分子组装体中。