4-methoxy-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole | 1178903-36-0

• 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: 4-methoxy-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole
• 英文别名: 4-methoxy-1-(oxan-2-yl)indazole
• CAS: 1178903-36-0
• 化学式: C₁₃H₁₆N₂O₂
• 分子量: 232.282
• InChiKey: RFSSLKNEAAXUOC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  36.3
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  3,4-二氢-2H-吡喃 、 4-甲氧基吲唑 在 对甲苯磺酸 作用下， 以 氯仿 为溶剂， 反应 1.0h， 以97%的产率得到4-methoxy-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole
  参考文献：
  名称：

  Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions

  摘要：

  Indazoles are unselectively protected under strongly basic conditions to give a mixture at N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodynamic conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivative.

  DOI：

  10.1021/jo9006656

文献信息

• A mild and efficient THP protection of indazoles and benzyl alcohols in water
  作者：Yang Zhan、Xiao Ding、Hailong Wang、Haihua Yu、Feng Ren

  DOI：10.1016/j.tetlet.2018.02.061

  日期：2018.5

  A mild and efficient method for THP protection of indazoles and benzyl alcohols has been developed in water, the most environmentally friendly solvent, in which Tween 20 (2% w/w) was added to form aqueous micelles to increase the solubility of starting materials. This aqueous protocol allowed the reaction to proceed smoothly at room temperature and with only 1.2 equiv of DHP, providing moderate to

  在最环保的溶剂水中开发了一种温和有效的THP保护吲唑和苄醇的方法，在其中添加了Tween 20（2％w / w）以形成水性胶束，以提高起始原料的溶解度。该水性方案使反应在室温下仅用1.2当量的DHP即可顺利进行，从而为各种底物提供了中等至良好的THP保护产物收率。此外，该方法在大规模合成中非常实用（例如以1 g的2c合成为例），其中便利的后处理和纯化程序（简单过滤）使该方案更具吸引力。
• Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions
  作者：David J. Slade、Nicholas F. Pelz、Wanda Bodnar、John W. Lampe、Paul S. Watson

  DOI：10.1021/jo9006656

  日期：2009.8.21

  Indazoles are unselectively protected under strongly basic conditions to give a mixture at N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodynamic conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivative.