methyl (S)-2-acetylamino-3-(thiophen-3-yl)propanoate | 171095-13-9

• 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: methyl (S)-2-acetylamino-3-(thiophen-3-yl)propanoate
• 英文别名: methyl (2S)-2-acetamido-3-thiophen-3-ylpropanoate
• CAS: 171095-13-9
• 化学式: C₁₀H₁₃NO₃S
• 分子量: 227.284
• InChiKey: KIBAXJBKVYCWDP-VIFPVBQESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  15
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  83.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  Methyl (Z)-2-acetylamino-3-(3-thienyl)-propenoate 在 phosphino>-β-D-glucopyranoside>Rh(COD)>⁺SbF6^- 氢气 作用下， 以 四氢呋喃 为溶剂， 反应 3.0h， 生成 methyl (S)-2-acetylamino-3-(thiophen-3-yl)propanoate
  参考文献：
  名称：

  Carbohydrate Phosphinites as Practical Ligands in Asymmetric Catalysis:  Electronic Effects and Dependence of Backbone Chirality in Rh-Catalyzed Asymmetric Hydrogenations. Synthesis of R- or S-Amino Acids Using Natural Sugars as Ligand Precursors

  摘要：

  Vicinal diarylphosphinites derived from carbohydrates are excellent ligands for the Rh(I)-catalyzed enantioselective asymmetric hydrogenation of dehydroamino acid derivatives, producing the highest enantioselectivity of any ligands directly prepared from natural products. The enantioselectivity can be enhanced by the appropriate choice of substituents on the aromatic rings of the phosphinites. For example, the use of phosphinites with electron-donating bis(3,5-dimethylphenyl) groups on phosphorus provides ee's up to 99% for a wide range of amino acids including some with easily removable N-protecting groups. Electron-withdrawing aryl substituents, on the other hand, decrease the enantioselectivity. Sense of chiral induction in the amino acid product depends on the relative juxtaposition of the vicinal diphosphinites on a given sugar backbone. When readily available D-glucopyranosides are used as the starting sugars, 2,3-phosphinites give the S-amino acids and 3,4-phosphinites give the R-amino acids. In the case of aromatic and heteroaromatic amino acids, enantioselectivities > 95% are consistently obtained. Practical considerations such as the ease of ligand synthesis, rates of reactions, catalyst turnover, and scope and limitations in terms of substrates are discussed. A possible explanation for the enhancement of enantioselectivity by electron-rich phosphinites is offered.

  DOI：

  10.1021/jo970884d

文献信息

• Access to Enantioenriched α-Amino Esters via Rhodium-Catalyzed 1,4-Addition/Enantioselective Protonation
  作者：Laure Navarre、Rémi Martinez、Jean-Pierre Genet、Sylvain Darses

  DOI：10.1021/ja710691p

  日期：2008.5.1

  Conjugate addition of potassium trifluoro(organo)borates 2 to dehydroalanine derivatives 1, mediated by a chiral rhodium catalyst and in situ enantioselective protonation, afforded straightforward access to a variety of protected alpha-amino esters 3 with high yields and enantiomeric excesses up to 95%. Among the tested chiral ligands and proton sources, Binap, in combination with guaiacol (2-methoxyphenol)

  在手性铑催化剂和原位对映选择性质子化的介导下，三氟（有机）硼酸钾 2 与脱氢丙氨酸衍生物 1 的共轭加成可以直接获得各种受保护的 α-氨基酯 3，收率高，对映体过量高达 95% . 在测试的手性配体和质子源中，Binap 与愈创木酚（2-甲氧基苯酚）（一种廉价且无毒的苯酚）结合，提供了最高的不对称诱导。有机锡烷也显示参与该反应。通过对酯部分进行微调，并使用二氟磷作为手性配体，提高了对映选择性，通常接近 95%。氘标记实验揭示，并支持 DFT 计算，
• Tandem 1,4-Addition/Enantioselective Protonation Catalyzed by Rhodium Complexes: Efficient Access toα-Amino Acids
  作者：Laure Navarre、Sylvain Darses、Jean-Pierre Genet

  DOI：10.1002/anie.200352518

  日期：2004.1.30
• Carbohydrate Phosphinites as Practical Ligands in Asymmetric Catalysis:  Electronic Effects and Dependence of Backbone Chirality in Rh-Catalyzed Asymmetric Hydrogenations. Synthesis of <i>R</i>- or <i>S</i>-Amino Acids Using Natural Sugars as Ligand Precursors
  作者：T. V. RajanBabu、Timothy A. Ayers、Gary A. Halliday、Kimberly K. You、Joseph C. Calabrese

  DOI：10.1021/jo970884d

  日期：1997.8.1

  Vicinal diarylphosphinites derived from carbohydrates are excellent ligands for the Rh(I)-catalyzed enantioselective asymmetric hydrogenation of dehydroamino acid derivatives, producing the highest enantioselectivity of any ligands directly prepared from natural products. The enantioselectivity can be enhanced by the appropriate choice of substituents on the aromatic rings of the phosphinites. For example, the use of phosphinites with electron-donating bis(3,5-dimethylphenyl) groups on phosphorus provides ee's up to 99% for a wide range of amino acids including some with easily removable N-protecting groups. Electron-withdrawing aryl substituents, on the other hand, decrease the enantioselectivity. Sense of chiral induction in the amino acid product depends on the relative juxtaposition of the vicinal diphosphinites on a given sugar backbone. When readily available D-glucopyranosides are used as the starting sugars, 2,3-phosphinites give the S-amino acids and 3,4-phosphinites give the R-amino acids. In the case of aromatic and heteroaromatic amino acids, enantioselectivities > 95% are consistently obtained. Practical considerations such as the ease of ligand synthesis, rates of reactions, catalyst turnover, and scope and limitations in terms of substrates are discussed. A possible explanation for the enhancement of enantioselectivity by electron-rich phosphinites is offered.