Halogen Bond-Assisted Electron-Catalyzed Atom Economic Iodination of Heteroarenes at Room Temperature
作者:Imran Kazi、Somraj Guha、Govindasamy Sekar
DOI:10.1021/acs.joc.9b00174
日期:2019.6.7
halogen bond-assisted electron-catalyzed iodination of heteroarenes has been developed for the first time under atom economic condition at room temperature. The iodination is successful with just 0.55 equiv of iodine and 0.50 equiv of peroxide. The kinetic study indicates that the reaction is elusive in the absence of a halogen bond between the substrate and iodine. The formation of a halogen bond, its
Palladium-catalysed tandem alkenyl- and aryl-C–N bond formation: a cascade N-annulation route to 1-functionalised 7-azaindoles
作者:Roy C. Hodgkinson、Jurgen Schulz、Michael C. Willis
DOI:10.1016/j.tet.2009.08.046
日期:2009.10
A series of 3-(2-haloalkenyl)-2-pyridyl-halides undergo consecutive palladium-catalysed inter- and intramolecular amination reactions to deliver a series of 1-functionalised 7-azaindoles. Anilines and amines can be readily employed as the N-nucleophile and incorporation of both electron-donating and electron withdrawing substituents on the pyridine core is possible. (C) 2009 Elsevier Ltd. All rights reserved.
AlCl<sub>3</sub>/PCC-SiO<sub>2</sub>-Promoted Oxidation of Azaindoles and Indoles
A simple and efficient method is described for the oxidation of 7-azaindoles and indoles to 7-azaisatins and isatins using pyridinium chlorochromate-silica gel (PCC-SiO2) with the aid of Lewis acid catalyst aluminium chloride (AlCl3) in dichloroethane. Simplicity of the reaction conditions, easy workup procedure, and good yields are the key features of this protocol.