5-methoxy-6-chlorobenzofuroxane | 1026172-96-2

• 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: 5-methoxy-6-chlorobenzofuroxane
• 英文别名: 5-chloro-6-methoxy-benzo[1,2,5]oxadiazole 3-oxide；6-Chlor-5-methoxy-benzofuroxan；5-Chloro-6-methoxy-3-oxido-2,1,3-benzoxadiazol-3-ium
• CAS: 1026172-96-2
• 化学式: C₇H₅ClN₂O₃
• 分子量: 200.581
• InChiKey: FVSCDLQVDCLDMZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  60.7
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  5-methoxy-6-chlorobenzofuroxane 在 羟胺 作用下， 生成 6-Chlor-5-methoxybenzofurazan
  参考文献：
  名称：

  苯并呋喃二酮单肟的相互转化

  摘要：

  描述了5-羟基-4-亚硝基和7-羟基-4-亚硝基苯并呋喃的制备以及它们的6-氯和甲基衍生物，并确定了这些化合物的肟结构。苯并呋喃zan-4,5-二酮-4-一肟和苯并呋喃-4,7-二酮-4-一肟的NMR光谱显示了溶液中两种一元酚4,5-和4,7-衍生物相互转化的证据分别在有机溶剂和碱性水溶液中盛行。苯并呋喃-4,5-和4,7-二酮-4-一肟的氯和甲基衍生物在有机溶剂中显示出相似的相互转化。

  DOI：

  10.1016/s0040-4020(01)97074-7
• 作为产物：
  描述：

  3-氯-4-甲氧基苯胺 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 5-methoxy-6-chlorobenzofuroxane
  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

• Sainz, Yolanda; Montoya, Maria Elena; Martinez-Crespo, Francisco Javier, Arzneimittel-Forschung/Drug Research, 1999, vol. 49, # 1, p. 55 - 59
  作者：Sainz, Yolanda、Montoya, Maria Elena、Martinez-Crespo, Francisco Javier、Ortega, Miguel Angel、Lopez De Cerain, Adela、Monge, Antonio

  DOI：——

  日期：——
• 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.
• Interconversion of benzofurazandione monoximes
  作者：A.S. Angeloni、D. Dal Monte、E. Sandri、G. Scapini

  DOI：10.1016/s0040-4020(01)97074-7

  日期：1974.1

  7-hydroxy-4-nitrosobenzofurazan as well as of their 6-chloro and methyl derivatives is described and the oxime structure of these compounds is established. NMR spectra of benzofurazan-4,5-dione-4-monoxime and benzofurazan-4,7-dione-4-monoxime show evidence for an interconversion, in solution, of two monoximes, the 4,5- and 4,7-derivative prevailing in organic solvents and aqueous alkaline media, respectively

  描述了5-羟基-4-亚硝基和7-羟基-4-亚硝基苯并呋喃的制备以及它们的6-氯和甲基衍生物，并确定了这些化合物的肟结构。苯并呋喃zan-4,5-二酮-4-一肟和苯并呋喃-4,7-二酮-4-一肟的NMR光谱显示了溶液中两种一元酚4,5-和4,7-衍生物相互转化的证据分别在有机溶剂和碱性水溶液中盛行。苯并呋喃-4,5-和4,7-二酮-4-一肟的氯和甲基衍生物在有机溶剂中显示出相似的相互转化。