was developed through palladium-catalyzed tandem addition/cyclization of potassium aryltrifluoroborates with aliphatic nitriles in aqueous medium. The use of water as the reaction medium makes the synthesis process environmentally benign. A plausible mechanism for the formation of 2-arylindoles involving sequential nucleophilic addition followed by an intramolecular cyclization is proposed. Moreover
[EN] COMPOUND HAVING BENZO SEVEN-MEMBERED RING STRUCTURE, PREPARATION METHOD THEREFOR, AND USE THEREOF<br/>[FR] COMPOSÉ AYANT UNE STRUCTURE BENZO CYCLIQUE À SEPT CHAÎNONS, PROCÉDÉ DE PRÉPARATION CORRESPONDANT ET UTILISATION ASSOCIÉE<br/>[ZH] 一种具有苯并七元环结构的化合物、其制备方法及用途
FeCl3-catalyzed sequential cyclization for the construction of 12-aryl 5,7-dihydropyrido[2,3-b:6,5-b']diindoles
作者:Xiaoqian Chen、Lin Li、Changfeng Wan、Jin-Biao Liu
DOI:10.1016/j.tetlet.2020.152334
日期:2020.9
A facile approach to prepare 12-aryl 5,7-dihydropyrido[2,3-b:6,5-b']diindoles via tandem cyclizations is described. FeCl3 is used as the catalyst for the reaction between o-aminophenylacetonitriles and aromatic aldehydes, generating 5,7-dihydropyrido[2,3-b:6,5-b']diindoles derivatives in moderate to high yields. (C) 2020 Elsevier Ltd. All rights reserved.