Photosensitizer-Free Visible-Light-Mediated Gold-Catalyzed 1,2-Difunctionalization of Alkynes
作者:Long Huang、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201511487
日期:2016.4.4
vinyl gold intermediate instead of the commonly used protodemetalation step. This step provides facile access to functionalized products in one‐pot processes. With a P,N‐bidentate ligand, a stable aryl gold(III) species was obtained, which constitutes the first direct experimental evidence for the commonly postulated direct oxidative addition of an aryl diazonium salt to a pyridine phosphine gold(I) complex
在可见光照射下,炔烃与芳基重氮盐在甲醇中金催化的炔烃分子间双官能团化反应可提供中等至良好收率的各种α-芳基酮。与先前有关涉及氧化还原循环的金催化反应的报告相比,不需要外部氧化剂或光敏剂。在温和的反应条件下,反应平稳进行,并显示出宽泛的官能团耐受性。该方法的进一步应用证明了乙烯基金中间体芳基化的普遍适用性,而不是通常使用的原型脱金属步骤。通过此步骤,可以轻松地通过一锅法访问功能化产品。使用P,N-双齿配体,获得了稳定的芳基金(III)物种,