2-benzoylamino-4-methylpentanoic acid prop-2-ynyl ester

• 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: 2-benzoylamino-4-methylpentanoic acid prop-2-ynyl ester
• 英文别名: prop-2-ynyl 2-benzamido-4-methylpentanoate
• 化学式: C₁₆H₁₉NO₃
• 分子量: 273.332
• InChiKey: UEKGKZPOSGCSBA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  20
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 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：

  2-benzoylamino-4-methylpentanoic acid prop-2-ynyl ester 在 sodium hydride 、 三乙胺 、 三苯基膦 作用下， 以 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 6.25h， 生成 2-(benzoyl(prop-2-ynyl)amino)-2-isobutylpenta-3,4-dienoic acid methyl ester
  参考文献：
  名称：

  Heterocyclic α-Alkylidene Cyclopentenones Obtained via a Pauson−Khand Reaction of Amino Acid Derived Allenynes. A Scope and Limitation Study Directed toward the Preparation of a Tricyclic Pyrrole Library

  摘要：

  [GRAPHICS]The synthesis of a novel class of tricyclic pyrroles has been accomplished by using a Pauson-Khand/Stetter/Paal-Knorr reaction sequence. Full details of the Pauson-Khand reaction of amino acid tethered allenynes 4a-e and 9a-d are disclosed. The study of this reaction led to the discovery of an unprecedented substituent effect on the diastereoselectivity of the MO(CO)(6) mediated allenic Pauson-Khand reaction. It was found that amino acid tethered allenynes with aromatic side chains afford alpha-alkylidene cyclopentenones with the opposite diastereoselectivity compared to those with aliphatic side chains. This effect has been attributed to complexation of the metal mediator to the aromatic ring in the substrate. Furthermore, an isomerization of one of the diastereomers of the a-alkylidene cyclopentenones was encountered, leading to eventual decomposition. The stable diastereomers were found to react well in the Stetter reaction leading to 1,4-diketones that were converted to pyrroles. The observation that the first generation of 2-alkyl-substituted pyrroles was unstable led to a second generation of 2-carboxamide pyrroles with sufficient stability for biological tests which are in progress.

  DOI：

  10.1021/jo0481607
• 作为产物：
  描述：

  N-苯甲酰亮氨酸 、 3-溴丙炔 在 potassium carbonate 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 16.5h， 以83%的产率得到2-benzoylamino-4-methylpentanoic acid prop-2-ynyl ester
  参考文献：
  名称：

  N-保护的氨基酸和肽的C-丙炔基酯的合成

  摘要：

  近年来，人们对将炔烃衍生的基元用于所谓的“点击”化学反应产生了极大的兴趣。鉴于氨基酸在有机合成中的至关重要性及其在“点击”化学中的众多应用，值得注意的是，C-炔丙基衍生的氨基酸酯的合成并未得到很好的服务。我们报道了结构多样的C-炔丙基衍生的N-保护的氨基酸酯的方便，直接和高产率的合成。

  DOI：

  10.1021/jo100537q

文献信息

• Synthesis of <i>C</i>-Propargylic Esters of N-Protected Amino Acids and Peptides
  作者：Sean P. Bew、Glyn D. Hiatt-Gipson

  DOI：10.1021/jo100537q

  日期：2010.6.4

  critical importance of amino acids in organic synthesis as well as their myriad of applications in “click” chemistry it is interesting to note that the synthesis of C-propargyl derived amino acid esters has not been particularly well served. We report a convenient, straightforward, and high-yielding synthesis of structurally diverse C-propargyl-derived N-protected amino acid esters.

  近年来，人们对将炔烃衍生的基元用于所谓的“点击”化学反应产生了极大的兴趣。鉴于氨基酸在有机合成中的至关重要性及其在“点击”化学中的众多应用，值得注意的是，C-炔丙基衍生的氨基酸酯的合成并未得到很好的服务。我们报道了结构多样的C-炔丙基衍生的N-保护的氨基酸酯的方便，直接和高产率的合成。
• Heterocyclic α-Alkylidene Cyclopentenones Obtained via a Pauson−Khand Reaction of Amino Acid Derived Allenynes. A Scope and Limitation Study Directed toward the Preparation of a Tricyclic Pyrrole Library
  作者：Kay M. Brummond、Dennis P. Curran、Branko Mitasev、Stefan Fischer

  DOI：10.1021/jo0481607

  日期：2005.3.1

  [GRAPHICS]The synthesis of a novel class of tricyclic pyrroles has been accomplished by using a Pauson-Khand/Stetter/Paal-Knorr reaction sequence. Full details of the Pauson-Khand reaction of amino acid tethered allenynes 4a-e and 9a-d are disclosed. The study of this reaction led to the discovery of an unprecedented substituent effect on the diastereoselectivity of the MO(CO)(6) mediated allenic Pauson-Khand reaction. It was found that amino acid tethered allenynes with aromatic side chains afford alpha-alkylidene cyclopentenones with the opposite diastereoselectivity compared to those with aliphatic side chains. This effect has been attributed to complexation of the metal mediator to the aromatic ring in the substrate. Furthermore, an isomerization of one of the diastereomers of the a-alkylidene cyclopentenones was encountered, leading to eventual decomposition. The stable diastereomers were found to react well in the Stetter reaction leading to 1,4-diketones that were converted to pyrroles. The observation that the first generation of 2-alkyl-substituted pyrroles was unstable led to a second generation of 2-carboxamide pyrroles with sufficient stability for biological tests which are in progress.