4-N-(2-aminoethyl)pyrimidine-2,4-diamine | 1204809-16-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 4-N-(2-aminoethyl)pyrimidine-2,4-diamine
• 英文别名: N4-(2-aminoethyl)pyrimidine-2,4-diamine
• CAS: 1204809-16-4
• 化学式: C₆H₁₁N₅
• 分子量: 153.187
• InChiKey: OMIKZFNGGSTKND-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.8
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  89.8
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  4-N-(2-aminoethyl)pyrimidine-2,4-diamine 在 (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、 caesium carbonate 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 N-甲基吡咯烷酮 、 水 为溶剂， 反应 88.0h， 生成 N4-{2-[(2-aminopyrimidin-4-yl)amino]ethyl}-6-(3-chlorophenyl)pyrimidine-2,4-diamine
  参考文献：
  名称：

  Bispyrimidines as Potent Histamine H₄ Receptor Ligands: Delineation of Structure–Activity Relationships and Detailed H₄ Receptor Binding Mode

  摘要：

  The basic methylpiperazine moiety is considered a necessary substructure for high histamine H-4 receptor (H4R) affinity. This moiety is however also the metabolic hot spot for various classes of H4R ligands (e.g., indolcarboxamides and pyrimidines). We set out to investigate whether mildly basic 2-aminopyrimidines in combination with the appropriate linker can serve as a replacement for the methylpiperazine moiety. In the series of 2-aminopyrimidines, the introduction of an additional 2-aminopyrimidine moiety in combination with the appropriate linker lead to bispyrimidines displaying pK(i) values for binding the human H4R up to 8.2. Furthermore, the methylpiperazine replacement results in compounds with improved metabolic properties. The attempt to transfer the knowledge generated in the class of bispyrimidines to the indolecarboxamides failed. Combining the derived structure-activity relationships with homology modeling leads to new detailed insights in the molecular aspects of ligand-H4R binding in general and the binding mode of the described bispyrimidines in specific.

  DOI：

  10.1021/jm301886t
• 作为产物：
  描述：

  tert-butyl N-[2-[(2-aminopyrimidin-4-yl)amino]ethyl]carbamate 在 盐酸 作用下， 以 水 为溶剂， 反应 16.0h， 以85%的产率得到4-N-(2-aminoethyl)pyrimidine-2,4-diamine
  参考文献：
  名称：

  Bispyrimidines as Potent Histamine H₄ Receptor Ligands: Delineation of Structure–Activity Relationships and Detailed H₄ Receptor Binding Mode

  摘要：

  The basic methylpiperazine moiety is considered a necessary substructure for high histamine H-4 receptor (H4R) affinity. This moiety is however also the metabolic hot spot for various classes of H4R ligands (e.g., indolcarboxamides and pyrimidines). We set out to investigate whether mildly basic 2-aminopyrimidines in combination with the appropriate linker can serve as a replacement for the methylpiperazine moiety. In the series of 2-aminopyrimidines, the introduction of an additional 2-aminopyrimidine moiety in combination with the appropriate linker lead to bispyrimidines displaying pK(i) values for binding the human H4R up to 8.2. Furthermore, the methylpiperazine replacement results in compounds with improved metabolic properties. The attempt to transfer the knowledge generated in the class of bispyrimidines to the indolecarboxamides failed. Combining the derived structure-activity relationships with homology modeling leads to new detailed insights in the molecular aspects of ligand-H4R binding in general and the binding mode of the described bispyrimidines in specific.

  DOI：

  10.1021/jm301886t

文献信息

• Synthesis, SAR and selectivity of 2-acyl- and 2-cyano-1-hetarylalkyl-guanidines at the four histamine receptor subtypes: a bioisosteric approach
  作者：Roland Geyer、Patrick Igel、Melanie Kaske、Sigurd Elz、Armin Buschauer

  DOI：10.1039/c3md00245d

  日期：——

  In the search for potential bioisosteres of the 4-imidazolyl ring in acylguanidines (e.g. UR-AK24), known to possess affinity to several histamine receptor subtypes (HxR, x = 1–4), and cyanoguanidine-type H4R agonists (e.g. UR-PI376), the contribution of various heterocycles to agonism, antagonism and HR subtype selectivity was studied (recombinant human H1,2,3,4Rs, isolated guinea pig organs (H1R, H2R)). While minor structural modifications of UR-PI376 analogues were not tolerated regarding H4R agonism, in the case of the acylguanidines, a 1,2,4-triazole ring shifted the selectivity toward the H2R.

  在寻找酰基胍类（如 UR-AK24）（已知对几种组胺受体亚型（HxR，x = 1-4）具有亲和力）和氰基胍类 H4R 激动剂（如 UR-PI376）中 4-咪唑环的潜在生物异构体时，研究了各种杂环对激动作用、拮抗作用和 HR 亚型选择性的贡献（重组人 H1、2、3、4R，分离的胍类）。例如 UR-PI376），研究了各种杂环化合物对激动、拮抗和组胺受体亚型选择性的贡献（重组人 H1、2、3、4Rs，离体豚鼠器官（H1R、H2R））。UR-PI376类似物的微小结构改性对H4R的激动作用没有影响，而对酰基胍类化合物来说，1,2,4-三唑环会使其对H2R的选择性发生改变。
• US9688989B2
  申请人：——

  公开号：US9688989B2

  公开（公告）日：2017-06-27
• Bispyrimidines as Potent Histamine H₄ Receptor Ligands: Delineation of Structure–Activity Relationships and Detailed H₄ Receptor Binding Mode
  作者：Harald Engelhardt、Sabine Schultes、Chris de Graaf、Saskia Nijmeijer、Henry F. Vischer、Obbe P. Zuiderveld、Julia Dobler、Katharina Stachurski、Moriz Mayer、Heribert Arnhof、Dirk Scharn、Eric E. J. Haaksma、Iwan J. P. de Esch、Rob Leurs

  DOI：10.1021/jm301886t

  日期：2013.6.13

  The basic methylpiperazine moiety is considered a necessary substructure for high histamine H-4 receptor (H4R) affinity. This moiety is however also the metabolic hot spot for various classes of H4R ligands (e.g., indolcarboxamides and pyrimidines). We set out to investigate whether mildly basic 2-aminopyrimidines in combination with the appropriate linker can serve as a replacement for the methylpiperazine moiety. In the series of 2-aminopyrimidines, the introduction of an additional 2-aminopyrimidine moiety in combination with the appropriate linker lead to bispyrimidines displaying pK(i) values for binding the human H4R up to 8.2. Furthermore, the methylpiperazine replacement results in compounds with improved metabolic properties. The attempt to transfer the knowledge generated in the class of bispyrimidines to the indolecarboxamides failed. Combining the derived structure-activity relationships with homology modeling leads to new detailed insights in the molecular aspects of ligand-H4R binding in general and the binding mode of the described bispyrimidines in specific.