1-Cyclohexyl-3-[2-(1H-imidazol-4-yl)-ethyl]-thiourea

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 1-Cyclohexyl-3-[2-(1H-imidazol-4-yl)-ethyl]-thiourea
• 英文别名: 1-cyclohexyl-3-[2-(1H-imidazol-5-yl)ethyl]thiourea
• 化学式: C₁₂H₂₀N₄S
• 分子量: 252.384
• InChiKey: VTOSZEZIVREOGU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.666
• 拓扑面积：
  84.8
• 氢给体数：
  3
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  histamine dichloride 、 环己基异硫氰酸脂 在 sodium ethanolate 作用下， 生成 1-Cyclohexyl-3-[2-(1H-imidazol-4-yl)-ethyl]-thiourea
  参考文献：
  名称：

  New Analogs of Burimamide as Potent and Selective Histamine H3 Receptor Antagonists: The Effect of Chain Length Variation of the Alkyl Spacer and Modifications of the N-Thiourea Substituent

  摘要：

  Burimamide was one of the first compounds reported to antagonize the activation of the histamine H-3 receptor by histamine. We have prepared a large series of burimamide analogs by variation of the alkyl spacer length of burimamide from two methylene groups to six methylene groups and also by replacement of the N-methyl group with other alkyl and aryl groups. All analogs are reversible, competitive H-3 antagonists as determined on the guinea pig intestine. Elongation of the alkyl chain from an ethylene chain to a hexylene chain results in an increase of the H-3 antagonistic activity. The H-3 selective pentylene and hexylene analogs of burimamide are about 10 times more potent than burimamide. The N-thiourea substituents, however, have no beneficial influence on the affinity.

  DOI：

  10.1021/jm00012a025

文献信息

• Design of Potent Non-Thiourea H3-Receptor Histamine Antagonists
  作者：C. Robin Ganellin、S. Kiumars Hosseini、Yasmin S. Khalaf、Wasyl Tertiuk、Jean-Michel Arrang、Monique Garbarg、Xavier Ligneau、Jean-Charles Schwartz

  DOI：10.1021/jm00017a018

  日期：1995.8

  Starting from thioperamide, the first potent and selective H3-receptor histamine antagonist, analogues have been synthesized and tested in vitro on rat cerebral cortex to explore structure-activity relationships. The aim has been to design potent compounds which do not possess the thiourea group of thioperamide and which may have improved brain penetration. In a short series of open chain thiourea

  从第一个有效的选择性H3受体组胺拮抗剂thioperamide开始，已经合成了类似物，并在大鼠大脑皮质进行了体外测试，以探索其结构活性之间的关系。目的是设计不具有硫代过酰胺的硫脲基团并且可以改善脑渗透性的有效化合物。在短系列的开链硫脲类似物中，发现H3拮抗剂效能的最佳链长为（CH2）3。衍生自组胺并在侧链氨基上具有芳族含氮杂环而不是硫脲的化合物具有H3拮抗活性。此外，当杂环为2-吡啶基时，吡啶5-位上的吸电子取代基（例如NO 2，CF 3，CO 2 Me）增加了效力。描述了4- [4（5）-咪唑基]哌啶的合成及其向硫代过酰胺的（三氟甲基）吡啶基类似物5b的转化。然而，5b不如硫代过酰胺强。用吡啶取代咪唑或在远处的N上取代咪唑会大大降低效力。用S取代侧链NH进一步提高了效力，最有效的化合物是2-（[2- [4（5）-咪唑基]乙基]硫基] -5-硝基吡啶（UCL 1199），其Ki = 4.8