2-methoxy-5-((methylimino)methyl)phenol | 66396-01-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 酚类
• 英文名称: 2-methoxy-5-((methylimino)methyl)phenol
• 英文别名: 3-Hydroxy-4-methoxybenzaldehyd-N-methylimin；2-Methoxy-5-(methyliminomethyl)phenol
• CAS: 66396-01-8
• 化学式: C₉H₁₁NO₂
• 分子量: 165.192
• InChiKey: BPLKJPGJGIWFKV-UHFFFAOYSA-N

物化性质

• 沸点：
  295.3±30.0 °C(Predicted)
• 密度：
  1.06±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  41.8
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  异香兰素 在 硫酸羟胺 、 sodium hydroxide 作用下， 以 异丙醇 为溶剂， 生成 2-methoxy-5-((methylimino)methyl)phenol
  参考文献：
  名称：

  Retention of Oximes of Aromatic Carbonyl Compounds Under Conditions of Reversed Phase HPLC

  摘要：

  DOI：

  10.1134/s003602442403035x

文献信息

• Simple and efficient one-pot solvent-free synthesis of N-methyl imines of aromatic aldehydes
  作者：Niko S. Radulović、Ana B. Miltojević、Rastko D. Vukićević

  DOI：10.1016/j.crci.2013.01.010

  日期：2013.3

  Résumé A one-pot solvent-free synthesis of N-methyl imines in good to excellent yields was performed by grinding together aromatic aldehydes and methylamine hydrochloride in the presence of a base. The best yields were achieved when an excess of methylamine hydrochloride and inexpensive sodium hydrogen carbonate was used (usually in a molar ratio ArCHO/CH3NH2·HCl/NaHCO3 = 1:5:5), allowing the reaction to proceed for 1 h (in the case of aromatic aldehydes containing electron-withdrawing substituents) or overnight (in the case of electron-rich aldehydes). After a simple work-up (extraction with diethyl ether) the obtained products were mostly pure enough for spectral characterization. In this way, 31 N-methyl imines were prepared, among which eight were synthesized for the first time. Their structures were elucidated by spectral means (1H- and 13C-NMR, IR, MS) whenever it was possible. In the case of salicylaldehyde and 4-chlorobenzaldehyde, the synthesis of the corresponding imines was also conducted on a gram-scale with a 72% and 84% isolated yield, respectively. The present approach not only provides good to high yields, but also eliminates the disadvantages of the traditional synthesis of N-methyl imines, such as the use of hazardous solvents and more or less expensive catalysts and the necessity of work/handling with an anhydrous gas in pressurized containers.

  简述 在碱存在下，通过将芳香醛和盐酸甲胺研磨在一起，实现了 N-甲基亚胺的单锅无溶剂合成，收率从良好到极佳。当使用过量的盐酸甲胺和廉价的碳酸氢钠时（通常摩尔比 ArCHO/CH3NH2-HCl/NaHCO3 = 1:5:5），让反应进行 1 小时（如果是含有抽电子取代基的芳香醛）或过夜（如果是电子丰富的醛），可获得最佳收率。经过简单的处理（用二乙醚萃取）后，得到的产物大多纯度很高，足以进行光谱鉴定。通过这种方法，共制备出 31 种 N-甲基亚胺，其中 8 种是首次合成。在可能的情况下，通过光谱手段（1H-和 13C-NMR、IR、MS）阐明了它们的结构。对于水杨醛和 4-氯苯甲醛，也在克级规模上合成了相应的亚胺，分离收率分别为 72% 和 84%。本方法不仅产量高，而且消除了传统合成 N-甲基亚胺的缺点，如使用有害溶剂和或多或少昂贵的催化剂，以及必须在加压容器中使用无水气体工作/处理。