Inverting the Selectivity of the Newman–Kwart Rearrangement via One Electron Oxidation at Room Temperature
作者:Stephan K. Pedersen、Anne Ulfkjær、Madeleine N. Newman、Sarangki Yogarasa、Anne U. Petersen、Theis I. Sølling、Michael Pittelkow
DOI:10.1021/acs.joc.8b01800
日期:2018.10.5
The discovery that the Newman–Kwart rearrangement can be performed at room temperature by action of a simple and readily available oxidant, cerium ammonium nitrate, is described. The conditions give clean conversion when using electron-rich aromatic substrates, and the reactions are often quantitative. Computational studies support a reaction mechanism where the O-thiocarbamate is first oxidized to
描述了发现纽曼-科沃特重排反应可在室温下通过简单易得的氧化剂硝酸铈铵进行的发现。当使用富含电子的芳族底物时,条件可产生干净的转化,并且反应通常是定量的。计算研究支持一种反应机理,其中先将O-硫代氨基甲酸酯氧化成自由基阳离子,然后再由芳族系统的ipso碳进行亲核攻击。