Copper-Promoted One-Pot Sandmeyer-Type Reaction for the Synthesis of <i>N</i>-Aryltriazoles
作者:Menghan Cui、Rong Wang、Qing Yang、Chunxiang Kuang
DOI:10.1021/acs.joc.2c00697
日期:2022.8.5
reaction of aromatic amines with triazoles to afford N-aryl-1,2,3-triazoles. Diazonium salts, formed from aromatic amines and tert-butyl nitrite in the presence of fluoroboric acid, reacted with triazoles in a copper-catalyzed Sandmeyer-type reaction. The reaction proceeded under mild conditions to afford N-aryltriazoles in moderate to good yields. This method is amenable to a wide range of aromatic amines
在此,我们报道了芳香胺与三唑的铜催化一锅 Sandmeyer 型反应,得到N-芳基-1,2,3-三唑。在氟硼酸存在下由芳族胺和亚硝酸叔丁酯形成的重氮盐在铜催化的 Sandmeyer 型反应中与三唑反应。反应在温和条件下进行得到N-芳基三唑,产率适中。该方法适用于多种芳香胺和三唑,并显示出多种官能团耐受性。添加自由基清除剂后对反应的抑制表明存在自由基途径,其中芳基自由基、铜和三唑形成络合物,经过还原消除得到芳基三唑化合物;这与 Sandmeyer 反应的机理是一致的。因此,我们展示了一种通过 Sandmeyer 型反应构建 C-N 键的新有效策略,以及一种有价值的合成芳基三唑衍生物的替代方法。