2-ethyl-3-(4-methoxybenzoyl)-4Hchromen-4-one | 19981-85-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 高异黄酮
• 英文名称: 2-ethyl-3-(4-methoxybenzoyl)-4Hchromen-4-one
• 英文别名: 2-ethyl-3-(4-methoxybenzoyl)chromen-4-one
• CAS: 19981-85-2
• 化学式: C₁₉H₁₆O₄
• 分子量: 308.334
• InChiKey: LKZFIWLDWPZKDG-UHFFFAOYSA-N

物化性质

• 沸点：
  452.4±45.0 °C(Predicted)
• 密度：
  1.225±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  23
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.16
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-ethyl-3-(4-methoxybenzoyl)-4Hchromen-4-one 在 ammonium chloride 作用下， 以 氯苯 为溶剂， 反应 2.0h， 以82%的产率得到2-ethyl-3-(4-hydroxybenzoyl)-4H-chromen-4-one
  参考文献：
  名称：

  Modeling and synthesis of novel tight-binding inhibitors of cytochrome P450 2C9

  摘要：

  Cytochrome P450 2C9 (2C9) is one of the three major drug metabolizing cytochrome P450 enzymes in human liver. Although the crystal structure of 2C9 has been solved, the important physicochemical properties of substrate-enzyme interactions remain difficult to be determined. This is due in part to the conformational flexibility of mammalian P450 enzymes. Therefore, probing the active-site with high-affinity substrates is important in further understanding substrate-enzyme interactions. Three-dimensional quantitative structure-activity relationships (3D-QSAR) and docking experiments have been shown to be useful tools in correlating biological activity with structure. In particular we have previously reported that the very tight-binding inhibitor benzbromarone can provide important information about the active-site of 2C9. In this study we report the binding affinities and potential substrate-enzyme interactions of 4H-chromen-4-one analogs, which are structurally similar to benzbromarone. The chromenone structures are synthetically accessible inhibitors and give inhibition constants as low as 4.2 nM, comparable with the very tightest-binding inhibitors of 2C9. Adding these compounds to our previous 2C9 libraries for CoMFA models reinforces the important electrostatic and hydrophobic features of substrate binding. These compounds have also been docked in the 2C9 crystal structure and the results indicate that Arg 108 plays significant roles in the binding of chromenone substrates. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.01.021
• 作为产物：
  描述：

  2-乙酰基苯基对茴香酸酯 在 氢氧化钾 、 三乙胺 作用下， 以 吡啶 为溶剂， 生成 2-ethyl-3-(4-methoxybenzoyl)-4Hchromen-4-one
  参考文献：
  名称：

  Synthesis of 3-alkenyl-2-arylchromones and 2,3-dialkenylchromones via acid-catalysed retro-Michael ring opening of 3-acylchroman-4-ones

  摘要：

  3-Acylchromones and 3-acylflavones, readily available by acylation of 2'-hydroxydibenzoylmethane with acid anhydrides in the presence of base, undergo efficient conjugate reduction with NaBH4 in pyridine to give the corresponding chroman-4-ones/flavanones in high yields. The reduction is both regio- and chemoselective. Treatment of the chroman-4-ones with MeSO3H generates the 3-alkenyl-2-arylchromones by a dehydrative rearrangement initiated by retro-Michael cleavage of the pyranone ring. This reduction-rearrangement sequence can be extended to 2-alkyl-3-alkenoylchromones to generate 3-alkenyl-2-styrylchromones, the first examples of 2,3-dialkenylchromones. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2005.06.058

文献信息

• Synthesis of 3-alkenyl-2-arylchromones and 2,3-dialkenylchromones via acid-catalysed retro-Michael ring opening of 3-acylchroman-4-ones
  作者：David S. Clarke、Christopher D. Gabbutt、John D. Hepworth、B. Mark Heron

  DOI：10.1016/j.tetlet.2005.06.058

  日期：2005.8

  3-Acylchromones and 3-acylflavones, readily available by acylation of 2'-hydroxydibenzoylmethane with acid anhydrides in the presence of base, undergo efficient conjugate reduction with NaBH4 in pyridine to give the corresponding chroman-4-ones/flavanones in high yields. The reduction is both regio- and chemoselective. Treatment of the chroman-4-ones with MeSO3H generates the 3-alkenyl-2-arylchromones by a dehydrative rearrangement initiated by retro-Michael cleavage of the pyranone ring. This reduction-rearrangement sequence can be extended to 2-alkyl-3-alkenoylchromones to generate 3-alkenyl-2-styrylchromones, the first examples of 2,3-dialkenylchromones. (c) 2005 Elsevier Ltd. All rights reserved.
• Modeling and synthesis of novel tight-binding inhibitors of cytochrome P450 2C9
  作者：Chi-Chi Peng、Tom Rushmore、Gregory J. Crouch、Jeffrey P. Jones

  DOI：10.1016/j.bmc.2008.01.021

  日期：2008.4.1

  Cytochrome P450 2C9 (2C9) is one of the three major drug metabolizing cytochrome P450 enzymes in human liver. Although the crystal structure of 2C9 has been solved, the important physicochemical properties of substrate-enzyme interactions remain difficult to be determined. This is due in part to the conformational flexibility of mammalian P450 enzymes. Therefore, probing the active-site with high-affinity substrates is important in further understanding substrate-enzyme interactions. Three-dimensional quantitative structure-activity relationships (3D-QSAR) and docking experiments have been shown to be useful tools in correlating biological activity with structure. In particular we have previously reported that the very tight-binding inhibitor benzbromarone can provide important information about the active-site of 2C9. In this study we report the binding affinities and potential substrate-enzyme interactions of 4H-chromen-4-one analogs, which are structurally similar to benzbromarone. The chromenone structures are synthetically accessible inhibitors and give inhibition constants as low as 4.2 nM, comparable with the very tightest-binding inhibitors of 2C9. Adding these compounds to our previous 2C9 libraries for CoMFA models reinforces the important electrostatic and hydrophobic features of substrate binding. These compounds have also been docked in the 2C9 crystal structure and the results indicate that Arg 108 plays significant roles in the binding of chromenone substrates. (C) 2008 Elsevier Ltd. All rights reserved.