6-Chloro-5-fluoro-3-oxido-2,1,3-benzoxadiazol-3-ium | 54259-26-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶二唑类
• 英文名称: 6-Chloro-5-fluoro-3-oxido-2,1,3-benzoxadiazol-3-ium
• CAS: 54259-26-6
• 化学式: C₆H₂ClFN₂O₂
• 分子量: 188.545
• InChiKey: OAMQEJRMHOGHLK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  51.5
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  6-Chloro-5-fluoro-3-oxido-2,1,3-benzoxadiazol-3-ium 在 三乙胺 作用下， 以 1,4-二氧六环 、 N,N-二甲基甲酰胺 为溶剂， 反应 96.0h， 生成 7-Chloro-8-fluoro-2-oxo-5-oxy-2H-1-oxa-3,5,9b-triaza-cyclopenta[a]naphthalene-4-carbonitrile
  参考文献：
  名称：

  4-氰基-2-氧代-1,2,4-氧二唑[2,3- a ]喹喔啉5- N-氧化物。新的合成方法和与醇的反应。潜在的细胞毒活性

  摘要：

  几种喹喔啉1,4-二-N-氧化物已被证明是低氧细胞的有效和选择性细胞毒素。现在我们介绍一系列的4-氰基-2-氧代-1,2,4-恶二唑并[2,3- a ]喹喔啉5 - N-氧化物2a-2k。它们是在干燥的二恶烷中在100–110°下从3-氨基-2-喹喔啉腈1，a-二-N-氧化物1a-1k和2-氯乙基异氰酸酯开始制备的。提出了一种反应机理。用异氰酸苯酯处理1a得到2a。2c与硅胶反应，得到1c。化合物2a-2g将其在乙醇和2-丙醇存在下加热，得到相应的氨基甲酸酯3a-3g和4a-4g。通过加热1d和氯甲酸乙酯的混合物已经获得了化合物2d。当将氨基甲酸酯3b加热至150°时制备化合物2b。喹喔啉在有氧和低氧细胞中均作为细胞毒性剂进行了测试。最有趣的化合物是3g和4g。

  DOI：

  10.1002/jhet.5570330620
• 作为产物：
  描述：

  4-氯-3-氟苯胺 在 盐酸 、 sodium azide 、 硫酸 、 硝酸 、 sodium acetate 、 sodium nitrite 作用下， 以 溶剂黄146 、 甲苯 为溶剂， 反应 3.42h， 生成 6-Chloro-5-fluoro-3-oxido-2,1,3-benzoxadiazol-3-ium
  参考文献：
  名称：

  Hypoxia-Selective Agents Derived from Quinoxaline 1,4-Di-N-oxides

  摘要：

  Hypoxic cells, which are a common feature of solid tumors, but not normal tissues, are resistant to both anticancer drugs and radiation therapy. Thus the identification of drugs with selective toxicity toward hypoxic cells is an important objective in anticancer chemotherapy. The benzotriazine di-N-oxide (SR 4233, Tirapazamine) has been shown to be an efficient and selective cytotoxin for hypoxic cells. Since the bioreductive activation of Tirapazamine is thought to be due to the presence of the 1,4-di-N-oxide moiety, a series of 3-aminoquinoxaline-2-carbonitrile 1,4-di-N-oxides with a range of electron-donating and -withdrawing substituents in the 6- and/or 7- positions has been synthesized and evaluated for toxicity to hypoxic cells. Electrochemical studies of the quinoxaline di-N-oxides and Tirapazamine showed that as the electron-withdrawing nature of the 6(7)-substituent increases, the reduction potential becomes more positive and the compound is more readily reduced. Apart from the unsubstituted 6a and the 6,7-dimethyl derivative 6c, the quinoxaline di-N-oxides have reduction potentials significantly more positive than Tirapazamine (E(pc)-0.90 V). The most potent cytotoxins to cells in culture were the 6,7,-dichloro and 6,7-difluoro derivatives 6i and 6l, which were 30-fold more potent than Tirapazamine. The 6(7)-fluoro and 6(7)-chloro compounds, 6e and 6h, showed the greatest hypoxia selectivity. Four of the compounds, 6e, 6f, 6h and 6i, killed the inner cells of multicellular tumor spheroids in vitro. In vivo Balb/c mice tolerated a dose of these four compounds twice the size of that of Tirapazamine. This study demonstrates that quinoxaline 1,4-di-N-oxides could provide useful hypoxia-selective therapeutic agents.

  DOI：

  10.1021/jm00010a023

文献信息

• Hypoxia-Selective Agents Derived from Quinoxaline 1,4-Di-N-oxides
  作者：Antonio Monge、Juan A. Palop、Adela Lopez de Cerain、Virginia Senador、Francisco J. Martinez、Yolanda Sainz、Susana Narro、Estrella Garcia、Carlos de Miguel

  DOI：10.1021/jm00010a023

  日期：1995.5

  Hypoxic cells, which are a common feature of solid tumors, but not normal tissues, are resistant to both anticancer drugs and radiation therapy. Thus the identification of drugs with selective toxicity toward hypoxic cells is an important objective in anticancer chemotherapy. The benzotriazine di-N-oxide (SR 4233, Tirapazamine) has been shown to be an efficient and selective cytotoxin for hypoxic cells. Since the bioreductive activation of Tirapazamine is thought to be due to the presence of the 1,4-di-N-oxide moiety, a series of 3-aminoquinoxaline-2-carbonitrile 1,4-di-N-oxides with a range of electron-donating and -withdrawing substituents in the 6- and/or 7- positions has been synthesized and evaluated for toxicity to hypoxic cells. Electrochemical studies of the quinoxaline di-N-oxides and Tirapazamine showed that as the electron-withdrawing nature of the 6(7)-substituent increases, the reduction potential becomes more positive and the compound is more readily reduced. Apart from the unsubstituted 6a and the 6,7-dimethyl derivative 6c, the quinoxaline di-N-oxides have reduction potentials significantly more positive than Tirapazamine (E(pc)-0.90 V). The most potent cytotoxins to cells in culture were the 6,7,-dichloro and 6,7-difluoro derivatives 6i and 6l, which were 30-fold more potent than Tirapazamine. The 6(7)-fluoro and 6(7)-chloro compounds, 6e and 6h, showed the greatest hypoxia selectivity. Four of the compounds, 6e, 6f, 6h and 6i, killed the inner cells of multicellular tumor spheroids in vitro. In vivo Balb/c mice tolerated a dose of these four compounds twice the size of that of Tirapazamine. This study demonstrates that quinoxaline 1,4-di-N-oxides could provide useful hypoxia-selective therapeutic agents.
• 4-Cyano-2-oxo-1,2,4-oxadiazolo[2,3-<i>a</i>]quinoxaline 5-<i>N</i>-oxides. New synthetic method and reaction with alcohols. Potential cytotoxic activity
  作者：F. J. Martínez Crespo、J. A. Palop、Y. Sainz、S. Narro、V. Senador、M. González、A. López De Ceráin、A. Monge、E. Hamilton、A. J. Barker

  DOI：10.1002/jhet.5570330620

  日期：1996.11

  Several quinoxaline 1,4-di-N-oxides have been shown to be efficient and selective cytotoxins for hypoxic cells. We present now a series of 4-cyano-2-oxo-1,2,4-oxadiazolo[2,3-a]quinoxaline 5-N-oxides 2a-2k. They were prepared starting from 3-amino-2-quinoxalinecarbonitrile 1,4-di-N-oxides 1a-1k and 2-chloroethyl isocyanate in dry dioxane at 100–110°. A reaction mechanism is proposed. The treatment of

  几种喹喔啉1,4-二-N-氧化物已被证明是低氧细胞的有效和选择性细胞毒素。现在我们介绍一系列的4-氰基-2-氧代-1,2,4-恶二唑并[2,3- a ]喹喔啉5 - N-氧化物2a-2k。它们是在干燥的二恶烷中在100–110°下从3-氨基-2-喹喔啉腈1，a-二-N-氧化物1a-1k和2-氯乙基异氰酸酯开始制备的。提出了一种反应机理。用异氰酸苯酯处理1a得到2a。2c与硅胶反应，得到1c。化合物2a-2g将其在乙醇和2-丙醇存在下加热，得到相应的氨基甲酸酯3a-3g和4a-4g。通过加热1d和氯甲酸乙酯的混合物已经获得了化合物2d。当将氨基甲酸酯3b加热至150°时制备化合物2b。喹喔啉在有氧和低氧细胞中均作为细胞毒性剂进行了测试。最有趣的化合物是3g和4g。