(S)-(-)-N'-(3-chlorophenylsulfonyl)-N-ethyl-5-phenyl-4,5-dihydro-1H-pyrazole-1-carboxamidine | 1337926-48-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: (S)-(-)-N'-(3-chlorophenylsulfonyl)-N-ethyl-5-phenyl-4,5-dihydro-1H-pyrazole-1-carboxamidine
• 英文别名: (3S)-N-(3-chlorophenyl)sulfonyl-N'-ethyl-3-phenyl-3,4-dihydropyrazole-2-carboximidamide
• CAS: 1337926-48-3
• 化学式: C₁₈H₁₉ClN₄O₂S
• 分子量: 390.893
• InChiKey: WKVAITJZJBYHQA-KRWDZBQOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  26
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  82.5
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  5-苯基-4,5-二氢-1H-吡唑 在 吡啶 作用下， 以 甲醇 、 水 为溶剂， 反应 1.0h， 生成 (R)-(+)-N'-(3-chlorophenylsulfonyl)-N-ethyl-5-phenyl-4,5-dihydro-1H-pyrazole-1-carboxamidine 、 (S)-(-)-N'-(3-chlorophenylsulfonyl)-N-ethyl-5-phenyl-4,5-dihydro-1H-pyrazole-1-carboxamidine
  参考文献：
  名称：

  N′-(Arylsulfonyl)pyrazoline-1-carboxamidines as Novel, Neutral 5-Hydroxytryptamine 6 Receptor (5-HT₆R) Antagonists with Unique Structural Features

  摘要：

  The 5-HT6 receptor (5-HT6R) has been in the spotlight for several years regarding CNS-related diseases. We set out to discover novel, neutral 5-HT6R antagonists to improve off-target selectivity compared to basic amine-containing scaffolds dominating the field. High-throughput screening identified the N'-(sulfonyl)pyrazoline-1-carboxamidine scaffold as a promising neutral core for starting hit-to-lead. Medicinal chemistry, molecular modeling, small molecule NMR and X-ray crystallography were subsequently applied to optimize the leads into antagonists (compounds 1-49) displaying high 5-HT6R affinity with optimal off-target selectivity. Unique structural features include a pseudoaromatic system and an internal hydrogen bond freezing the bioactive conformation. While physicochemical properties and CNS availability were generally favorable, significant efforts had to be made to improve metabolic stability. The optimized structure 42 is an extremely selective, hERG-free, high-affinity 5-HT6R antagonist showing good human in vitro metabolic stability. Rat pharrnacokinetic data were sufficiently good to enable further in vivo profiling.

  DOI：

  10.1021/jm200466r