A palladium-catalyzed aminocarbonylative cyclization of benzyl chlorides with 2-nitroaryl alkynes has been developed for the rapid construction of indole skeletons. The reaction utilized nitroarenes as the nitrogen source, Mo(CO)6 as both the CO surrogate and the reductant to furnish various indole derivatives in moderate to high yields.
已经开发了一种钯催化的苄基氯与 2-硝基芳基炔烃的氨基羰基环化反应,用于快速构建吲哚骨架。该反应使用硝基芳烃作为氮源,Mo(CO) 6作为 CO 替代物和还原剂,以中等至高产率提供各种吲哚衍生物。
Facile access to 2-hydroxy-2-substituted indole-3-ones <i>via</i> a copper-catalyzed oxidative cyclization of 2-arylethynylanilines
paper reports a practical and versatileoxidativecyclization of 2-arylethynylanilines towards 2-hydroxy-2-substituted indol-3-ones via a copper-catalyzed radical approach in the presence of O2. The transformation of 2-hydroxy-2-arylindol-3-ones to 3-hydroxy-3-arylindol-2-ones proceeds well with good yields and highlights the practicability and utility of this catalytic system. Mechanistic investigations
本文报道了在 O 2存在下通过铜催化的自由基方法将 2-芳基乙炔基苯胺氧化环化为 2-羟基-2-取代的吲哚-3-酮的实用且通用的方法。2-hydroxy-2-arylindol-3-ones 向 3-hydroxy-3-arylindol-2-ones 的转化进展顺利,产率高,突出了该催化体系的实用性和实用性。机理研究表明,2-芳基乙炔基苯胺上的乙酰基取代基在环状产物的形成中起着重要作用,反应通过基于N中心自由基的5-内-地格氮杂环化途径进行。
Generation of Biradicals and Subsequent Formation of Quinolines and 5<i>H</i>-Benzo[<i>b</i>]carbazoles from <i>N</i>-[2-(1-Alkynyl)phenyl]ketenimines
作者:Chongsheng Shi、Kung K. Wang
DOI:10.1021/jo9804285
日期:1998.5.1
Synthesis of Ellipticine: A Radical Cascade Protocol to Aryl- and Heteroaryl-Annulated[<i>b</i>]carbazoles
作者:Jan M. Pedersen、W. Russell Bowman、Mark R. J. Elsegood、Anthony J. Fletcher、Peter J. Lovell
DOI:10.1021/jo0519920
日期:2005.12.1
Imidoyl selanides, synthesized from amides, have been used as radical precursors of imidoyl radicals in cascade reactions. The novel radical cascade has been developed for the simple synthesis of the medicinally important aryl-annulated[b]-carbazoles. The protocol has been exemplified with the high-yielding total synthesis of the anticancer alkaloid ellipticine.