CuSO4-Catalyzed Tandem C(sp3)–H Insertion Cyclization of Toluenes with Isonitriles to Form Indoles
摘要:
A CuSO4-catalyzed tandem benzylic C-H insertion cyclization of toluene derivatives and isonitriles is described. The naturally abundant salt CuSO4 serves as a low-cost ligand-free redox catalyst. This reaction provides a practical modular synthesis of N-aryl indoles from isonitriles.
A convenient eco-friendly system for the synthesis of 5-sulfenyl tetrazole derivatives of indoles and pyrroles employing CeCl<sub>3</sub>·7H<sub>2</sub>O in PEG-400
作者:Margiani P. Fortes、Mariana M. Bassaco、Teodoro S. Kaufman、Claudio C. Silveira
DOI:10.1039/c4ra05625f
日期:——
efficient and eco-friendly promoter system for the convenientsynthesis of 5-sulfenyl tetrazoles derived from indoles and pyrroles, is reported. The synthesis entails the [3 + 2] cycloaddition reaction of NaN3 with 3-thiocyanato indoles (including 3,3′-di-thiocyanato-1H,1H′,2,2′-biindoles) and 2-thiocyanato pyrroles. The thiocyanates were conveniently obtained by the oxone-mediated thiocyanation of differently
据报道,在聚乙二醇400(PEG-400)中使用CeCl 3 ·7H 2 O作为有效和环保的促进剂体系,可方便地合成由吲哚和吡咯衍生的5-亚磺酰基四唑。合成需要使NaN 3与3-硫代氰基吲哚(包括3,3'-二硫代氰基-1 H,1 H ',2,2'-双吲哚)和2-硫代氰基吡咯进行[3 + 2]环加成反应。硫氰酸盐可通过不同取代的起始吲哚,1 H,1 H ',2,2'-双吲哚和N-芳基吡咯与NH 4的异丁酮介导的硫氰酸氰化反应方便地获得SCN。还研究了转换的范围和局限性。
A manganese/copper bimetallic catalyst for C–N coupling reactions under mild conditions in water
作者:Yong-Chua Teo、Fui-Fong Yong、Gina Shiyun Lim
DOI:10.1016/j.tetlet.2011.10.128
日期:2011.12
An efficient and convenient bimetallic MnF2/CuI catalyst in combination with trans-1,2-diaminocyclohexane has been developed for the cross-coupling of nitrogen heterocycles with aryl halides in water at moderate temperature. A variety of nitrogen nucleophiles including pyrazole, 7-azaindole, indazole, indole, pyrrole and imidazole afforded the corresponding products in moderate to good yields (up to
2-(2-Haloalkenyl)-aryl Halides as Substrates for Palladium-Catalysed Tandem CN Bond Formation: Efficient Synthesis of 1-Substituted Indoles
作者:Michael C. Willis、Gareth N. Brace、Thomas J. K. Findlay、Ian P. Holmes
DOI:10.1002/adsc.200505484
日期:2006.5
2-(2-Haloalkenyl)-aryl halides, conveniently prepared in a single step from the corresponding o-halobenzaldehydes, are combined with amines under Pd catalysis to provide 1-substituted indoles. All combinations of Br and Cl leaving groups can be employed, and a range of substituents on the arene, alkene and amine, can all be tolerated. The use of 1,3-dichloro-substituted arenes allows a third amination
Facile Access to 3-Acylindoles through Palladium-Catalyzed Addition of Indoles to Nitriles: The One-Pot Synthesis of Indenoindolones
作者:Yuanhong Ma、Jingsong You、Feijie Song
DOI:10.1002/chem.201203354
日期:2013.1.21
The palladium‐catalyzed addition of indoles to nitriles affords 3‐acylindoles. The reaction proceeds with high selectivity, wide substrate scope, broadly available starting materials, and an operationally simple procedure. Combination with the palladium‐catalyzed intramolecular oxidative coupling of 3‐indolylarylketone gives access to indenoindolones in a one‐pot synthesis.
Efficient and recyclable copper-based MOF-catalyzed N-arylation of N-containing heterocycles with aryliodides
作者:Zihao Li、Fei Meng、Jie Zhang、Jianwei Xie、Bin Dai
DOI:10.1039/c6ob02068b
日期:——
Copper-based MOF-199 was used as an efficient heterogeneous catalyst to catalyze cross-coupling reactions between N-containing heterocycles and aryliodides with high yields.
铜基 MOF-199 被用作一种高效的异相催化剂,可催化含 N 杂环与芳基碘化物之间的交叉偶联反应,且产率高。