4-ethyl-1-(4-methoxyphenyl)-3,5-bisphenyl-1H-pyrazole

• 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-(4-methoxyphenyl)-3,5-bisphenyl-1H-pyrazole
• 英文别名: 4-ethyl-1-(4-methoxyphenyl)-3,5-bisphenylpyrazole；4-Ethyl-1-(4-methoxyphenyl)-3,5-diphenylpyrazole
• 化学式: C₂₄H₂₂N₂O
• 分子量: 354.451
• InChiKey: ARMLGJTXBWNMFV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6
• 重原子数：
  27
• 可旋转键数：
  5
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  27
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4-ethyl-1-(4-methoxyphenyl)-3,5-bisphenyl-1H-pyrazole 在 三溴化硼 作用下， 以 二氯甲烷 为溶剂， 以32%的产率得到4-(4-Ethyl-3,5-diphenyl-pyrazol-1-yl)-phenol
  参考文献：
  名称：

  Pyrazole Ligands:  Structure−Affinity/Activity Relationships and Estrogen Receptor-α-Selective Agonists

  摘要：

  We have found that certain tetrasubstituted pyrazoles are high-affinity ligands for the estrogen receptor (ER) (Fink et al. Chem. Biol. 1999, 6, 205-219) and that one pyrazole is considerably more potent as an agonist on the ER alpha than on the ER beta subtype (Sun et al. Endocrinology 1999, 140, 800-804). To investigate what substituent pattern provides optimal ER binding affinity and the greatest enhancement of potency as an ER alpha -selective agonist, we prepared a number of tetrasubstituted pyrazole analogues with defined variations at certain substituent positions. Analysis of their binding affinity pattern shows that a C(4)-propyl substituent is optimal and that a p-hydroxyl group on the N(1)-phenyl group also enhances affinity and selectivity for ER alpha. The best compound in this series, a propylpyrazole triol (PPT, compound 4g), binds to ER alpha with high affinity (ca. 50% that of estradiol), and it has a 410-fold binding affinity preference for ER alpha. It also activates gene transcription only through ER alpha. Thus, this compound represents the first ER alpha -specific agonist. We investigated the molecular basis for the exceptional ER alpha binding affinity and potency selectivity of pyrazole 4g by a further study of structure-affinity relationships in this series and by molecular modeling. These investigations suggest that the pyrazole triols prefer to bind to ER alpha with their C(3)-phenol in the estradiol A-ring binding pocket and that binding selectivity results from differences in the interaction of the pyrazole core and C(4)-propyl group with portions of the receptor where ER alpha has a smaller residue than ER beta. These ER subtype-specific interactions and the ER subtype-selective ligands that can be derived from them should prove useful in defining those biological activities in estrogen target cells that can be selectively activated through ER alpha.

  DOI：

  10.1021/jm000170m
• 作为产物：
  描述：

  2-二氮杂-1-苯乙酮 在 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 5.0h， 生成 4-ethyl-1-(4-methoxyphenyl)-3,5-bisphenyl-1H-pyrazole
  参考文献：
  名称：

  Base-free two-step synthesis of 1,3-diketones and β-ketoesters from α-diazocarbonyl compounds, trialkylboranes, and aromatic aldehydes

  摘要：

  我们描述了一种收敛的无基团两步合成方法，通过三组分反应从α-二氮碳酰化合物、三烷基硼烷和芳香醛合成1,3-二酮和β-酮酯。这一合成方法的潜力在于能够在三步反应中合成多种对称的1,3,5-三芳基-4-烷基和1,3,4,5-四芳基取代的吡唑。

  DOI：

  10.1039/c1ob05150d