6-methyl-8-(4-methyl-6-oxo-4,5-dihydro-1H-pyridazin-3-yl)-4H-1,4-benzoxazin-3-one | 114602-99-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶嗪类
• 英文名称: 6-methyl-8-(4-methyl-6-oxo-4,5-dihydro-1H-pyridazin-3-yl)-4H-1,4-benzoxazin-3-one
• CAS: 114602-99-2
• 化学式: C₁₄H₁₅N₃O₃
• 分子量: 273.291
• InChiKey: KWKQIPPXRVHYPY-UHFFFAOYSA-N

物化性质

• 密度：
  1.46±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  79.8
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  邻氨基对甲苯酚 在 盐酸 、 三氯化铝 、 乙酸酐 、 碳酸氢钠 、 肼 作用下， 以 甲醇 、 乙醇 、 水 、 N,N-二甲基甲酰胺 、 丙酮 为溶剂， 反应 11.0h， 生成 6-methyl-8-(4-methyl-6-oxo-4,5-dihydro-1H-pyridazin-3-yl)-4H-1,4-benzoxazin-3-one
  参考文献：
  名称：

  6-Benzoxazinylpyridazin-3-ones: potent, long-acting positive inotrope and peripheral vasodilator agents

  摘要：

  A series of 6-benzoxazinylpyridazin-3-ones was prepared and evaluated for inhibition of cardiac phosphodiesterase (PDE) fraction III in vitro and for positive inotropic activity in vivo. 6-[3,4-Dihydro-3-oxo-1,4(2H)-benzoxazin-7-yl]-2,3,4,5-tetrahydro-5 - methylpyridazin-3-one (bemoradan) was found to be an extremely potent and selective inhibitor of canine PDE fraction III and a long-acting, potent, orally active inotropic vasodilator agent in various canine models. Additional benzoxazin-6-yl and -8-yl compounds were also prepared. Altering the pyridazinone substitution from the 6-position to the 7-position produced a 14-fold increase in the iv cardiotonic potency (ED50) from 77 to 5.4 micrograms/kg while substitution at the 8-position reduced potency. Methyl substitution at various sites in the molecule was also examined. Positive inotropic activity was maintained for between 8 and 24 h after a single oral dose (100 micrograms/kg) of bemoradan in dogs, thus making it one of the most potent and long-acting orally effective inotropes yet described. Bemoradan is currently under development as a cardiotonic agent for use in the management of congestive heart failure.

  DOI：

  10.1021/jm00163a061

文献信息

• 6-Benzoxazinyl- and 6-benzothiazinyl-2,3,4,5-tetrahydropyridazin-3-ones
  申请人：ORTHO PHARMACEUTICAL CORPORATION

  公开号：EP0272914A2

  公开（公告）日：1988-06-29

  The synthesis of benzoxazinyl- and benzothiazinylpyridazinone compounds is described. The novel compounds are cardiotonic agents and inhibitors of phosphodiesterase. In addition, the compounds are useful as smooth muscle relaxants and bronchodilators.

  介绍了苯并恶嗪基和苯并噻嗪基哒嗪酮化合物的合成。 这些新型化合物是强心剂和磷酸二酯酶抑制剂。 此外，这些化合物还可用作平滑肌松弛剂和支气管扩张剂。
• US4721784A
  申请人：——

  公开号：US4721784A

  公开（公告）日：1988-01-26
• US4766118A
  申请人：——

  公开号：US4766118A

  公开（公告）日：1988-08-23
• US5081242A
  申请人：——

  公开号：US5081242A

  公开（公告）日：1992-01-14