作者:Amrah Nasim、Gilian T. Thomas、Jeffrey S. Ovens、Stephen G. Newman
DOI:10.1021/acs.orglett.2c03042
日期:2022.10.7
We report an intermolecular Ni-catalyzed reductive coupling of aryl iodides and isatins to form 3-hydroxyoxindoles. In contrast to common metal-mediated methods, sec-butanol is used as a mild stoichiometric reductant resulting in benign waste products. This formal 1,2-addition reaction is facilitated by a 1,5-diaza-3,7-diphosphacyclooctane (P2N2) ligand. Two Ni(0)–P2N2 species are prepared and found
我们报告了芳基碘化物和靛红的分子间 Ni 催化还原偶联形成 3-羟基羟吲哚。与常见的金属介导方法相比,仲丁醇用作温和的化学计量还原剂,产生良性废物。这种正式的 1,2-加成反应由 1,5-二氮杂-3,7-二磷环辛烷 (P 2 N 2 ) 配体促进。制备了两种 Ni(0)–P 2 N 2物质,发现它们具有催化活性,这支持了该反应通过修饰的羰基-Heck 型途径进行的机制假设。