4-ethyl-1,3-dihydro-1-(phenylmethyl)-2H-imidazol-2-one | 139199-27-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 4-ethyl-1,3-dihydro-1-(phenylmethyl)-2H-imidazol-2-one
• 英文别名: 3-benzyl-5-ethyl-1H-imidazol-2-one
• CAS: 139199-27-2
• 化学式: C₁₂H₁₄N₂O
• 分子量: 202.256
• InChiKey: ZTLFYNRUOQCDKL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  15
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  32.3
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  4-ethyl-1,3-dihydro-1-(phenylmethyl)-2H-imidazol-2-one 在 PPA 、 甲烷磺酸 作用下， 反应 24.0h， 生成 4-ethyl-1,3-dihydro-5-<4-(2-methyl-1H-imidazol-1-yl)benzoyl>-1-(phenylmethyl)-2H-imidazol-2-one
  参考文献：
  名称：

  Cardiotonic agents. 7. Prodrug derivatives of 4-ethyl-1,3-dihydro-5-[4-(2-methyl-1H-imidazol-1-yl)benzoyl]-2H-imidazol-2-one

  摘要：

  The cardiotonic agent 4-ethyl-1,3-dihydro-5-[4-(2-methyl-1H-imidazol-1-yl)benzoyl]-2H-imidazol-2-one (1) was found to have low bioavailability when administered orally to rats and dogs. A series of N-acyl derivatives, an underutilized prodrug of acidic NH compounds, has been synthesized and tested for their ability to improve the oral bioavailability of 1. Reaction of the monosodium salt of 1 with various anhydrides afforded the N-1 monoacylimidazolones with surprisingly high regioselectivity. In addition to the prodrugs, acylation of 1 with propionic or phenylacetic anhydride led to the novel 3H-pyrrolo[1,2-c]imidazole-3,5(2H)-diones 6. The prodrugs showed a significant increase in the partition coefficients with a minor decrease in the aqueous solubility. The benzoyl derivative 4b exhibited the highest stability in both pH 1.5 and 7.4 buffer solutions. Further evaluation of 4b showed rapid conversion to 1 in canine plasma (t1/2 = 38 min), and human plasma (t1/2 = 10 min). Oral studies indicated that the bioavailability of 4b was increased to > 75% (compared to < 20% for 1), and hemodynamic studies demonstrated that the selective inotropic profile of 1 was retained.

  DOI：

  10.1021/jm00085a014
• 作为产物：
  描述：

  5-乙基海因 在 sodium hydroxide 、 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 、 乙醇 为溶剂， 反应 54.0h， 生成 4-ethyl-1,3-dihydro-1-(phenylmethyl)-2H-imidazol-2-one
  参考文献：
  名称：

  Cardiotonic agents. 7. Prodrug derivatives of 4-ethyl-1,3-dihydro-5-[4-(2-methyl-1H-imidazol-1-yl)benzoyl]-2H-imidazol-2-one

  摘要：

  The cardiotonic agent 4-ethyl-1,3-dihydro-5-[4-(2-methyl-1H-imidazol-1-yl)benzoyl]-2H-imidazol-2-one (1) was found to have low bioavailability when administered orally to rats and dogs. A series of N-acyl derivatives, an underutilized prodrug of acidic NH compounds, has been synthesized and tested for their ability to improve the oral bioavailability of 1. Reaction of the monosodium salt of 1 with various anhydrides afforded the N-1 monoacylimidazolones with surprisingly high regioselectivity. In addition to the prodrugs, acylation of 1 with propionic or phenylacetic anhydride led to the novel 3H-pyrrolo[1,2-c]imidazole-3,5(2H)-diones 6. The prodrugs showed a significant increase in the partition coefficients with a minor decrease in the aqueous solubility. The benzoyl derivative 4b exhibited the highest stability in both pH 1.5 and 7.4 buffer solutions. Further evaluation of 4b showed rapid conversion to 1 in canine plasma (t1/2 = 38 min), and human plasma (t1/2 = 10 min). Oral studies indicated that the bioavailability of 4b was increased to > 75% (compared to < 20% for 1), and hemodynamic studies demonstrated that the selective inotropic profile of 1 was retained.

  DOI：

  10.1021/jm00085a014

文献信息

• Synthesis of N−H Bearing Imidazolidinones and Dihydroimidazolones Using Aza‐Heck Cyclizations
  作者：Feiyang Xu、Scott A. Shuler、Donald A. Watson

  DOI：10.1002/anie.201806295

  日期：2018.9.10

  The synthesis of unsaturated, unprotected imidazolidinones via an aza‐Heck reaction is described. This palladium‐catalyzed process allows for the cyclization of N‐phenoxy ureas onto pendant alkenes. The reaction has broad functional group tolerance, can be applied to complex ring topologies, and can be used to directly prepare mono‐ and bis‐unprotected imidazolidinones. By addition of Bu4NI, dihydroimidazolones

  描述了通过氮杂赫克反应合成不饱和、未保护的咪唑啉酮。这种钯催化的过程允许N-苯氧基脲环化到侧链烯烃上。该反应具有广泛的官能团耐受性，可应用于复杂的环拓扑，并可用于直接制备单和双未保护的咪唑啉酮。通过添加Bu 4 NI，可以从相同的起始材料获得二氢咪唑酮。还报道了制备不饱和、未保护的内酰胺的改进条件。