N-Acetyl-D-alanin-ethylester | 20918-90-5

• 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: N-Acetyl-D-alanin-ethylester
• 英文别名: ethyl (2R)-2-acetamidopropanoate
• CAS: 20918-90-5
• 化学式: C₇H₁₃NO₃
• 分子量: 159.185
• InChiKey: BFNYDDPQMKYKKJ-RXMQYKEDSA-N

物化性质

• 沸点：
  266.7±13.0 °C(Predicted)
• 密度：
  1.034±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  11
• 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：
  3

反应信息

• 作为反应物：
  描述：

  N-Acetyl-D-alanin-ethylester 在 吡啶 、 乙醇 、 水 、 肼 作用下， 反应 2.0h， 生成 N-(N-acetyl-D-alanyl)-N'-isonicotinoyl-hydrazine
  参考文献：
  名称：

  实验性结核菌素IV。氨基乙酰基异烟酰胺和2-甲基异烟酸酯基脲的衍生物

  摘要：

  合成了约27种异烟酸酰肼和2-甲基异烟酸酰肼的N-酰基衍生物以及氨基酸和酰基氨基酸。酰氨基酰基化合物的合成是根据三种不同的方法进行的：

  DOI：

  10.1002/hlca.19560390127
• 作为产物：
  描述：

  2-乙酰氨基丙酸乙酯 在 sodium hydroxide 、 α-chymotrypsin 作用下， 生成 N-Acetyl-D-alanin-ethylester
  参考文献：
  名称：

  Requirements for Stereospecificity in Hydrolysis by α-Chymotrypsin. III. The Acylamido Group¹

  摘要：

  DOI：

  10.1021/ja01481a031

文献信息

• Kinetic resolution of amines with enantiopure 3-N,N-diacylaminoquinazolin-4(3H)-ones
  作者：Al-Sehemi, Abdullah G.、Atkinson, Robert S.、Fawcett, John

  DOI：10.1039/b105917n

  日期：2002.1.7

  The title compounds (DAQs) are chiral when the two N-acyl groups are different because of the absence of rotation around the N–N bond (a chiral axis). Enantiopure DAQs have been obtained by incorporation of a chiral centre in enantiopure form either into the substituent at the Q2-position or into one of the N-acyl groups, or into both, followed by separation of diastereoisomers. This separation is unnecessary in one case because conversion of the N-monoacylaminoquinazolinone (MAQ) into the DAQ is completely diastereoselective. Neither is separation of diastereoisomers necessary with 3-[N,N-di-(S)-2-acetoxypropanoylamino]-2-diphenylmethylquinazolin-4(3H)-one 37a: this DAQ 37a has its N–N bond rendered a chiral axis by the bias in its imide moiety wholly in favour of one exo/endo conformation.The high chemoselectivity exhibited by N,N-diacetyl- or N,N-dibenzoylaminoquinazolinones in reaction with the less hindered of two secondary amines (pyrrolidine in the presence of 1 eq. of piperidine) has a stereoselective counterpart: reaction of the above enantiopure DAQs enantioselectively with racemic amines leading to kinetic resolution. Using 1 eq. of DAQ and 2 eq. of amine, both the derivatised and unreacted amine enantiomers are recovered with high enantiomeric excess (ee) (better than 90% ee in some cases). Some of the higher ees are found in the recovered amides where non-chemoselective attack on both N-acyl groups of the DAQ has occurred: from the opposite configurations of the amine component in the two amides and from the low enantiopurity of the recovered unreacted amine, reaction of each of the N-acyl groups with complementary enantiomers of the amine is occurring (parallel kinetic resolution).Although higher ees are, in general, obtained using secondary amines, high ees are obtained in some cases using 1-phenylethylamine and, in particular, amino acid esters (valine and alanine).The sense of enantioselectivity in the reactions of these DAQs with amines is controlled by the configuration of the N–N axis: replacing the Q group in an N-(S)-2-acetoxypropanoyl-N-acetyl-bearing DAQ by phthalimide, thus eliminating the N–N chiral axis, drastically reduces the level of kinetic resolution.

  标题化合物(DAQs)在两个N-酰基团不同时是手性的，因为N-N键（一个手性轴）缺乏旋转。通过将手性中心以手性形式引入Q2-位点的取代基或其中一个N-酰基团，或两者中，随后分离diastereoisomers，得到了纯对映体的DAQs。在一个情况下，这种分离是不必要的，因为将N-单酰胺基喹唑啉酮(MAQ)转化为DAQ是完全立体选择性的。对于3-[N,N-di-(S)-2-乙酰氧基丙酰胺基]-2-二苯甲基喹唑啉-4(3H)-酮37a，也不需要分离diastereoisomers：这个DAQ 37a通过其亚胺部分的偏向完全倾向于一个exo/endo构象，使其N-N键成为一个手性轴。N,N-二乙酰基或N,N-二苯甲酰氨基喹唑啉酮在与两个次级胺中较少受到阻碍的胺（在存在1 eq.的哌啶的情况下使用吡咯烷）反应时表现出高度的化学选择性，这在立体选择性上有对应：上述纯对映体的DAQs与外消旋胺反应，导致动力学拆分。使用1 eq.的DAQ和2 eq.的胺，衍生化的和未反应的胺对映体都以高对映体过量（ee）回收（在一些情况下优于90% ee）。在一些回收的酰胺中发现较高的ee，其中非化学选择性地攻击DAQ的两个N-酰基团：从两个酰胺中胺组分的相反构型和回收的未反应胺的低对映纯度，每个N-酰基团与胺的互补对映体反应（并行动态拆分）。尽管通常使用次级胺得到较高的ee，但在某些情况下使用1-苯乙胺，特别是氨基酸酯（缬氨酸和丙氨酸）得到高ee。这些DAQs与胺反应的对映选择性的方向受N-N轴配置的控制：在带有N-(S)-2-乙酰氧基丙酰基-N-乙酰基的DAQ中，通过用邻苯二甲酰亚胺替换Q组，从而消除N-N手性轴，显著降低了动力学拆分的水平。
• Enantioselective hydrolyses by baker's yeast - II
  作者：B.I. Glänzer、K. Faber、H. Griengl

  DOI：10.1016/s0040-4020(01)90011-0

  日期：——

  D-N-Acetyl amino acid esters were obtained via enantioselective hydrolysis of their racemates by use of fermenting yeast. Evidence is given that proteinases are the enzymes involved.

  DN-乙酰基氨基酸酯是通过使用发酵酵母通过其外消旋物的对映体选择性水解而获得的。有证据表明蛋白酶是所涉及的酶。
• α-Amino Acid Derivatives by Enantioselective Decarboxylation
  作者：Henri Brunner、Markus A. Baur

  DOI：10.1002/ejoc.200300206

  日期：2003.8

  The methodology of enantioselective decarboxylation was applied to 2-aminomalonic acid derivatives in order to obtain enantio-enriched amino acid derivatives. Full conversion was achieved stirring racemic N-acetylated 2-aminomalonic hemiesters in THF at 70 °C with 10 mol % of a chiral base for 24 h. The catalyst may be recycled. Whereas the commercially available cinchona alkaloids gave poor results

  对映选择性脱羧方法应用于 2-氨基丙二酸衍生物以获得富含对映体的氨基酸衍生物。在 70 °C 和 10 mol% 的手性碱的 THF 中搅拌外消旋 N-乙酰化 2-氨基丙二酸半酯 24 小时，实现完全转化。催化剂可以循环使用。尽管市售的金鸡纳生物碱效果不佳，但 9-氨基（9-脱氧）表金鸡碱的苯甲酰胺和苯磺酰胺衍生物被证明是有效的催化剂。以2-N-乙酰氨基-2-乙氧基羰基-3-苯基丙酸为起始原料，N-(9-脱氧表金鸡宁-9-基)-4-甲氧基苯甲酰胺为手性碱得到最佳结果，得到N-乙酰乙基-L-苯丙氨酸盐，含 70% ee。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
• Enantioselective hydrolysis by baker's yeast
  作者：B.I. Glänzer、K. Faber、H. Griengl

  DOI：10.1016/s0040-4039(00)94256-4

  日期：——

  Optically active N-acetylamino acid esters were obtained by enantioselective hydrolysis of their racemates using fermenting baker's yeast.

  光学活性的N-乙酰基氨基酸酯是通过使用发酵酵母进行对映体的对映体水解而获得的。
• 734. Cyto-active amino-acids and peptides. Part IX. Further studies of N-acyl-dipeptides from melphalan
  作者：R. Bergel、J. M. Johnson、Roy Wade

  DOI：10.1039/jr9620003802

  日期：——