LY 278989 | 109216-59-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡唑类
• 英文名称: LY 278989
• CAS: 109216-59-3
• 化学式: C₁₇H₂₂N₄O
• 分子量: 298.388
• InChiKey: DEJOSVHOGKOYEO-CLLJXQQHSA-N

物化性质

• 沸点：
  543.5±40.0 °C(Predicted)
• 密度：
  1.36±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.93
• 重原子数：
  22.0
• 可旋转键数：
  2.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.53
• 拓扑面积：
  50.16
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  吲唑-3-羧酸 在 sodium hydride 、 N,N'-羰基二咪唑 作用下， 反应 18.75h， 生成 LY 278989
  参考文献：
  名称：

  Synthesis and biochemical evaluation of tritium-labeled 1-methyl-N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole-3-carboxamide, a useful radioligand for 5HT3 receptors

  摘要：

  The advent of potent, highly selective 5HT3 receptor antagonists has stimulated considerable interest in 5HT3 receptor mediated physiology and pharmacology. To permit detailed biochemical studies regarding interaction of the indazole class of serotonin (5HT) antagonists with 5HT3 receptors in multiple tissues, we synthesized 1-methyl-N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole- 3-carboxamide (LY278584, compound 9) in high specific activity, tritium-labeled form. This radioligand was selected as a synthetic target because of its potency as a 5HT3-receptor antagonist, its selectivity for this receptor viz a viz other 5HT-receptor subtypes, and the ability to readily incorporate three tritia via the indazole N-CH3 substituent. Alkylation of N-(8-methyl-8-azabicyclo[3.2.1]oct-3-yl)-1H-indazole-3-carboxamide (8) with sodium hydride and tritium-labeled iodomethane, followed by HPLC purification, resulted in [3H]-9 with a radiochemical purity of 99% and a specific activity of 80.5 Ci/mmol. This radioligand bound with high affinity to a single class of saturable recognition sites in membranes isolated from cerebral cortex of rat brain. The Kd was 0.69 nM and the Bmax was 16.9 fmol/mg of protein. The specific binding was excellent, and accounted for 83-93% of total binding at concentrations of 2 nM or less. The potencies of known 5HT3-receptor antagonists as inhibitors of [3H]-9 binding correlated well with their pharmacological receptor affinities as antagonists of 5HT-induced decreases in heart rate and contraction of guinea pig ileum, suggesting the central recognition site for this radioligand may be extremely similar to or identical with peripheral 5HT3 receptors.

  DOI：

  10.1021/jm00174a013

文献信息

• Indazoles as indole bioisosteres: synthesis and evaluation of the tropanyl ester and amide of indazole-3-carboxylate as antagonists at the serotonin 5HT3 receptor
  作者：Pawel Fludzinski、Deborah A. Evrard、William E. Bloomquist、William B. Lacefield、William Pfeifer、Noel D. Jones、Jack B. Deeter、Marlene L. Cohen

  DOI：10.1021/jm00392a001

  日期：1987.9