Palladium- and Copper-Mediated Direct C-2 Arylation of Azoles — Including Free (NH)-Imidazole, -Benzimidazole and -Indole — Under Base-Free and Ligandless Conditions
作者:Fabio Bellina、Silvia Cauteruccio、Renzo Rossi
DOI:10.1002/ejoc.200500957
日期:2006.3
thiazole, oxazole, N-methylimidazole and N-arylimidazoles, as well as of free (NH)-imidazole, -benzimidazole and -indole, with aryl iodides under ligandless and base-free conditions are described. Complete selectivity has been achieved under these unprecedented conditions, which allow the use of substrates containing base-sensitive groups, such the NH groups of imidazole, benzimidazole or indole, without
首次钯和铜介导的噻唑、恶唑、N-甲基咪唑和 N-芳基咪唑以及游离 (NH)-咪唑、-苯并咪唑和-吲哚的 C-2 芳基化,在无配体和碱-描述了免费条件。在这些前所未有的条件下实现了完全的选择性,允许使用含有碱敏感基团的底物,例如咪唑、苯并咪唑或吲哚的 NH 基团,而无需事先保护。在游离(NH)-咪唑、-苯并咪唑和-吲哚的芳基化反应中未检测到N-芳基化产物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)