Synthesis of Benzofurans and Indoles from Terminal Alkynes and Iodoaromatics Catalyzed by Recyclable Palladium Nanoparticles Immobilized on Siliceous Mesocellular Foam
作者:Alexandre Bruneau、Karl P. J. Gustafson、Ning Yuan、Cheuk-Wai Tai、Ingmar Persson、Xiaodong Zou、Jan-E. Bäckvall
DOI:10.1002/chem.201702614
日期:2017.9.18
(Pd0‐AmP‐MCF), for the synthesis of heterocycles. Reaction of o‐iodophenols and protected o‐iodoanilines with acetylenes in the presence of a Pd nanocatalyst produced 2‐substituted benzofurans and indoles, respectively. In general, the catalytic protocol afforded the desired products in good to excellent yields under mild reaction conditions without the addition of ligands. Moreover, the structure
在本文中,我们报告了一种多相催化剂的利用,该催化剂由硅质介孔泡沫(Pd 0 -AmP-MCF)上负载的Pd纳米颗粒组成,用于杂环的合成。的反应Ó -iodophenols和保护ö与乙炔-iodoanilines在Pd纳米催化剂的存在下生产2-取代的苯并呋喃并吲哚,分别。通常,在温和的反应条件下,无需添加配体,催化方案就能以令人满意的良好收率获得所需的产物。此外,通过扩展的X射线吸收精细结构光谱进一步阐明了所报道的Pd纳米催化剂的结构,并且证明了该催化剂可以多次循环使用,而活性没有明显损失。