5-Methyl-pyridazin-1-oxid | 21004-77-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 5-Methyl-pyridazin-1-oxid
• 英文别名: 4-Methyl-pyridazin-2-oxid；4-Methylpyridazine 2-oxide；5-methyl-1-oxidopyridazin-1-ium
• CAS: 21004-77-3
• 化学式: C₅H₆N₂O
• 分子量: 110.115
• InChiKey: VEWXMODFUYLVKR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  38.4
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  5-Methyl-pyridazin-1-oxid 在 硫酸二甲酯 作用下， 反应 2.0h， 生成
  参考文献：
  名称：

  Pyridazine N-Oxides as Precursors of Metallocarbenes: Rhodium-Catalyzed Transannulation with Pyrroles

  摘要：

  Pyridazine N-oxides are used for the first time as precursors of metallocarbenes. These nitrogen-rich heterocycles led to the discovery of a novel acceptor and donor-acceptor enalcarbenoids. The synthetic utility of these metallocarbenes was demonstrated in the rhodium-catalyzed denitrogenative transannulation of pyridazine N-oxides with pyrroles to the valuable alkyl, 7-aryl, and 7-styryl indoles. The transannulation strategy was applied to the synthesis of a potent anticancer agent.

  DOI：

  10.1021/acs.orglett.5b03064
• 作为产物：
  描述：

  4-甲基哒嗪 在 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 以45%的产率得到4-Methyl-pyridazin-1-oxid
  参考文献：
  名称：

  Pyridazine N-Oxides as Precursors of Metallocarbenes: Rhodium-Catalyzed Transannulation with Pyrroles

  摘要：

  Pyridazine N-oxides are used for the first time as precursors of metallocarbenes. These nitrogen-rich heterocycles led to the discovery of a novel acceptor and donor-acceptor enalcarbenoids. The synthetic utility of these metallocarbenes was demonstrated in the rhodium-catalyzed denitrogenative transannulation of pyridazine N-oxides with pyrroles to the valuable alkyl, 7-aryl, and 7-styryl indoles. The transannulation strategy was applied to the synthesis of a potent anticancer agent.

  DOI：

  10.1021/acs.orglett.5b03064

文献信息

• Facile, One-Step Production of Niacin (Vitamin B3) and Other Nitrogen-Containing Pharmaceutical Chemicals with a Single-Site Heterogeneous Catalyst
  作者：Robert Raja、John Meurig Thomas、Michael Greenhill-Hooper、Steven V. Ley、Filipe A. Almeida Paz

  DOI：10.1002/chem.200701679

  日期：2008.3.7

  Niacin (3-picolinic acid), which is extensively used as vitamin B3 in foodstuffs and as a cholesterol-lowering agent, along with other oxygenated products of the picolines, 4-methylquinoline, and a variety of pyrimidines and pyridazines, may be produced in a single-step, environmentally benign fashion by combining single-site, open-structure, heterogeneous catalysts with a solid source of active oxygen

  可以在食品中生产烟酸（3-吡啶甲酸），广泛用作食品中的维生素B3和降胆固醇剂，以及甲基吡啶，4-甲基喹啉和其他嘧啶和哒嗪的其他氧化产物。通过在不存在有机溶剂的情况下，将单中心，开放结构的多相催化剂与活性氧的固体来源（即乙酰过氧硼酸盐（APB））结合使用，从而实现对环境友好的一步式生产。这种单中心非均相催化剂所具有的高活性，选择性和相对温和的条件，以及易于运输，储存和固体氧化剂的稳定性，为APB与其他开放式结构的未来使用预示了良好的前景。 ，适用于精细化工，制药和农业化学应用的单中心催化剂。
• Synthesis of<i>N</i>,<i>N</i>-Dioxopyridazines
  作者：Shlomo Rozen、Avshalom Shaffer

  DOI：10.1021/acs.orglett.7b02310

  日期：2017.9.15

  Despite many efforts, one of the smallest heterocycles containing two nitrogen atoms, pyridazine, could not be converted to its N,N-dioxide (see, however, Nakadate et al. Chem. Pharm. Bull. 1970, 18, 1211–1218). HOF·CH3CN, made easily from diluted fluorine, was able to accomplish this task in a fast reaction with good yields.

  尽管作了许多努力，含两个氮原子的最小杂环之一，哒嗪，不能转化成其Ñ，Ñ二氧化物（参见，然而，中馆等化学药物公报。 1970，18，1211-1218） 。HOF·CH 3 CN可以很容易地由稀释的氟制成，可以快速反应并以良好的收率完成此任务。
• Pyridazine <i>N</i>-Oxides as Precursors of Metallocarbenes: Rhodium-Catalyzed Transannulation with Pyrroles
  作者：Vinaykumar Kanchupalli、Desna Joseph、Sreenivas Katukojvala

  DOI：10.1021/acs.orglett.5b03064

  日期：2015.12.4

  Pyridazine N-oxides are used for the first time as precursors of metallocarbenes. These nitrogen-rich heterocycles led to the discovery of a novel acceptor and donor-acceptor enalcarbenoids. The synthetic utility of these metallocarbenes was demonstrated in the rhodium-catalyzed denitrogenative transannulation of pyridazine N-oxides with pyrroles to the valuable alkyl, 7-aryl, and 7-styryl indoles. The transannulation strategy was applied to the synthesis of a potent anticancer agent.