Isopropyl [(trifluoroacetyl)amino]acetate | 56936-67-5

• 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
• 英文名称: Isopropyl [(trifluoroacetyl)amino]acetate
• 英文别名: propan-2-yl 2-[(2,2,2-trifluoroacetyl)amino]acetate
• CAS: 56936-67-5
• 化学式: C₇H₁₀F₃NO₃
• 分子量: 213.157
• InChiKey: NMMHHNLBWAZRMW-UHFFFAOYSA-N

物化性质

• 沸点：
  220.7±40.0 °C(Predicted)
• 密度：
  1.251±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.4
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  55.4
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  甘氨酸异丙酯 、 三氟乙酸酐 以 二氯甲烷 为溶剂， 反应 0.17h， 生成 Isopropyl [(trifluoroacetyl)amino]acetate
  参考文献：
  名称：

  通过气相色谱/燃烧/同位素比质谱对氨基酸对映体进行稳定的氮同位素分析。

  摘要：

  提出了通过使用气相色谱/燃烧/同位素比质谱法（GC / C / IRMS）分析单个氨基酸立体异构体的稳定氮同位素组成的方法。单个氨基酸或其对映异构体的氮同位素组成可能不需要常规稳定同位素分析所需的劳动强度大且耗时的制备规模的色谱程序。在水解和衍生化之后，利用气相色谱分离的流出物流，对纳摩尔量的每种氨基酸立体异构体进行单组分同位素分析。在氨基酸酰化过程中，氮同位素的分馏极少，没有化学计量地将额外的氮添加到衍生物中。因此，衍生物中氮的同位素组成与原始化合物相同。通过常规同位素比质谱法（IRMS）和GC / C / IRMS对11个氨基酸及其三氟乙酰基（TFA）/异丙基（IP）酯衍生物进行了重复的稳定氮同位素分析，结果表明，气相色谱程序可高度重现（标准偏差通常为每千分之0.3-0.4），而氨基酸与其TFA / IP衍生物之间的同位素差异通常小于每千分之0.5。

  DOI：

  10.1021/ac960956l

文献信息

• Stable Nitrogen Isotope Analysis of Amino Acid Enantiomers by Gas Chromatography/Combustion/Isotope Ratio Mass Spectrometry
  作者：Stephen A. Macko、Maria E. Uhle、Michael H. Engel、Vladimir Andrusevich

  DOI：10.1021/ac960956l

  日期：1997.3.1

  analysis. Following hydrolysis and derivatization, single-component isotope analysis is accomplished on nanomole quantities of each of the stereoisomers of an amino acid, utilizing the effluent stream of gas chromatographic separation. Nitrogen isotope fractionation is minimal during acylation of the amino acid, with no additional nitrogen being added stoichiometrically to the derivative. Thus, the isotopic

  提出了通过使用气相色谱/燃烧/同位素比质谱法（GC / C / IRMS）分析单个氨基酸立体异构体的稳定氮同位素组成的方法。单个氨基酸或其对映异构体的氮同位素组成可能不需要常规稳定同位素分析所需的劳动强度大且耗时的制备规模的色谱程序。在水解和衍生化之后，利用气相色谱分离的流出物流，对纳摩尔量的每种氨基酸立体异构体进行单组分同位素分析。在氨基酸酰化过程中，氮同位素的分馏极少，没有化学计量地将额外的氮添加到衍生物中。因此，衍生物中氮的同位素组成与原始化合物相同。通过常规同位素比质谱法（IRMS）和GC / C / IRMS对11个氨基酸及其三氟乙酰基（TFA）/异丙基（IP）酯衍生物进行了重复的稳定氮同位素分析，结果表明，气相色谱程序可高度重现（标准偏差通常为每千分之0.3-0.4），而氨基酸与其TFA / IP衍生物之间的同位素差异通常小于每千分之0.5。
• Stable carbon isotope analysis of amino acid enantiomers by conventional isotope ratio mass spectrometry and combined gas chromatography/isotope ratio mass spectrometry
  作者：J. A. Silfer、M. H. Engel、S. A. Macko、E. J. Jumeau

  DOI：10.1021/ac00004a014

  日期：1991.2.15

  The application of a combined gas chromatography/isotope ratio mass spectrometry (GC/IRMS) method for stable carbon isotope analysis of amino acid enantiomers is presented. This method eliminates the numerous preparative steps integral to the isolation of amino acids and amino acid enantiomers from protein hydrolyzates that precede delta-C-13 analysis by conventional isotope ratio mass spectrometry. Unlike hydrocarbons, amino acids require derivatization prior to GC/IRMS analysis. Replicate delta-C-13 analyses of trifluoroacetyl (TFA) isopropyl ester derivatives of 22 amino acids by IRMS revealed that the derivatization process is reproducible, with an average error (1 standard deviation) of 0.10% +/- 0.09%. The average analytical error for analysis of amino acid derivatives by GC/IRMS was 0.26% +/- 0.09%. In general, absolute differences between IRMS and GC/IRMS analyses were less than 0.5%. The derivatization process introduces a distinct, reproducible isotopic fractionation that is constant for each amino acid type. The observed fractionations preclude direct calculation of underivatized amino acid delta-C-13 values from their respective TFA isopropyl ester delta-C-13 compositions through mass balance relationships. Derivatization of amino acid standards of known stable carbon isotope compositions in conjunction with natural samples, however, permits computation of the original, underivatized amino acid delta-C-13 values through use of an empirical correction for the carbon introduced during the derivatization process.
• 3D-structure of cycloreticulin C and glabrin A, cyclopeptides from the seeds of Annona reticulata
  作者：Alassane Wélé、Claudine Mayer、Dermigny Quentin、Yanjun Zhang、Alain Blond、Bernard Bodo

  DOI：10.1016/j.tet.2008.10.055

  日期：2009.1

  Two cyclopeptides, the cycloheptapeptide cycloreticulin C, cyclo(Pro(1)-Gly(2)-Gln(3)-Pro(4)-Pro(5)-Tyr(6)-Val(7)) (1), and the cyclohexapeptide glabrin A, cyclo(Pro(1)-Gly(2)-Leu(3)-Val(4)-Ile(5)-Tyr(6)) (2), have been isolated from the methanol extract of the seeds of Annona reticulata. Their Structures were elucidated on the basis of the MS/MS fragmentation using a Q-TOF mass spectrometer equipped with an ESI Source, chemical degradation and extensive 2D-NMR. The solution conformation of cycloreticulin C involves two beta-turns, one of type II with trans-Pro(1) and Gly(2) at the corners, another of type VIa with trans-Pro(4) and cis-Pro(5) at the corners, and followed by a beta-bulge at the Tyr(6)-Val(7) level. The solid state and solution conformations of glabrin A have been analyzed by X-ray and 2D-NMR studies, respectively, and are characterized by the presence of two beta-turns, the first of type VIa and the second intermediary between types I and III at the solid state and a gamma-turn in solution. (C) 2008 Elsevier Ltd. All rights reserved.
• Comparison of liquid chromatography-isotope ratio mass spectrometry (LC/IRMS) and gas chromatography-combustion-isotope ratio mass spectrometry (GC/C/IRMS) for the determination of collagen amino acid δ13C values for palaeodietary and palaeoecological rec
  作者：Philip J. H. Dunn、Noah V. Honch、Richard P. Evershed

  DOI：10.1002/rcm.5174

  日期：2011.10.30

  Results are presented of a comparison of the amino acid (AA) δ13C values obtained by gas chromatography–combustion–isotope ratio mass spectrometry (GC/C/IRMS) and liquid chromatography–isotope ratio mass spectrometry (LC/IRMS). Although the primary focus was the compound‐specific stable carbon isotope analysis of bone collagen AAs, because of its growing application for palaeodietary and palaeoecological

  结果表示的氨基酸（AA）的比较的δ 13个气相色谱-燃烧同位素比率质谱仪（GC / C / IRMS）和液相色谱-同位素比率质谱仪（LC / IRMS）获得的C值。虽然主要重点是因为其对palaeodietary和古生态重建不断增长的应用的骨胶原的AA的具体化合物稳定的碳同位素分析，结果是相关的，其中AA任何字段δ 13个是必需的C值。我们将LC / IRMS与使用N的最新GC / C / IRMS方法进行比较-乙酰甲基酯（NACME）AA衍生物。这种比较涉及分析人类考古胶原的标准AA和水解产物，这些物质先前已作为N-三氟乙酰基异丙基酯（TFA / IP）进行了研究。观察到，尽管GC / C / IRMS分析所需的样品较少，但LC / IRMS允许分析范围更广的AA，尤其是那些不适合GC分析的AA（例如精氨酸）。因此，重构的散装δ 13个C值基于LC / IRMS衍生δ 13个C值分别为接近EA

表征谱图