A highly effective and operationally simple method for the deuteration of phenols using NaOH as a catalyst and D2O as the deuterium source is presented. A high regioselectivity for the ortho and/or para hydrogens relative to the oxygen atom was achieved, as well as a high degree of deuterium incorporation. The method also has a high functional-group tolerance, and allowed the deuteration of complex
Shifted Selectivity in Protonation Enables the Mild Deuteration of Arenes Through Catalytic Amounts of Bronsted Acids in Deuterated Methanol
作者:Oliver Fischer、Anja Hubert、Markus R. Heinrich
DOI:10.1021/acs.joc.0c01604
日期:2020.9.18
effect” of the solvent methanol, deuterations of electron-rich aromatic systems can be carried out under mild acid catalysis and thus under far milder conditions than known so far. The exceptional functional group tolerance observed under the optimized conditions, which even includes highly acid-labile groups, results from a hitherto unexploited shifted selectivity in protonation, and enabled simple
On the mechanism of aromatic hydroxylation by O(3P) atoms
作者:Elazar Zadok、Yehuda Mazur
DOI:10.1016/s0040-4039(00)71164-6
日期:1980.1
It is shown that O(3P) oxidation of aromatic compounds in the liquid phase leading to phenols may involve the intermediacy of triplet diradicals.
结果表明,在液相中芳族化合物的O(3 P)氧化可导致酚类的发生,这可能涉及三重双自由基的中间体。
Oxygenation of Phenols with Water as the Oxygen Source and Oxoammonium Salt as the Oxidant
作者:Yongtao Wang、Jiaxin Liu、Wenjing Sun、Yujia Zhou、Xinyu Wang、Qixuan Hu、Zeyu Wen、Jia Yao、Haoran Li
DOI:10.1021/acs.joc.3c02448
日期:2024.2.16
Aromatic C–H oxygenation is important in both industrial production and organic synthesis. Here we report a metal-free approach for phenol oxygenation with water as the oxygen source using oxoammonium salts as the renewable oxidant. Employing this protocol, various alkyl-substituted phenols were converted into benzoquinones in yields of 59–98%. On the basis of 18O-labeling and kinetic studies, the