Ruthenium-Catalyzed Aminomethylation and Methylation of Phenol Derivatives Utilizing Methanol as the C<sub>1</sub>Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201601117
日期:2017.3.6
involving ortho‐aminomethylation of phenol was developed via ruthenium‐catalyzed dehydrogenation of methanol, an environmentally benign C1 building block, without the use of reactive reagents. The reaction was successfully applied to a range of substrates. When naphthol was employed instead of phenol, only methylation was observed. On the basis of various mechanistic studies, we propose that formamide barely
在不使用反应试剂的情况下,通过钌催化的甲醇的脱氢反应开发了一种涉及酚的邻氨基甲基化的反应,甲醇是一种对环境无害的C 1结构单元。该反应成功地应用于多种底物。当使用萘酚代替苯酚时,仅观察到甲基化。在各种机理研究的基础上,我们提出甲酰胺几乎不参与反应,这主要是通过亚胺阳离子中间体发生的。苯酚和萘酚的反应性差异归因于萘甲酸酯作为共轭碱的较强碱性,这是由于其芳香性较低。两种反应都提出了合理的反应途径。