Visible‐Light‐Induced Palladium‐Catalyzed Generation of Aryl Radicals from Aryl Triflates
作者:Maxim Ratushnyy、Nikita Kvasovs、Sumon Sarkar、Vladimir Gevorgyan
DOI:10.1002/anie.201915962
日期:2020.6.22
mild visible‐light‐induced Pd‐catalyzed intramolecular C−H arylation of amides is reported. The method operates by cleavage of a C(sp2)−O bond, leading to hybrid aryl Pd‐radical intermediates. The following 1,5‐hydrogen atom translocation, intramolecular cyclization, and rearomatization steps lead to valuable oxindole and isoindoline‐1‐one motifs. Notably, this method provides access to products with
据报道,轻度的可见光诱导的Pd催化酰胺内分子CH芳基化反应。该方法通过裂解C(sp 2)-O键来操作,从而生成杂芳基Pd-自由基中间体。以下1,5-氢原子移位,分子内环化和重新麦芽化步骤产生了有价值的羟吲哚和异吲哚啉-1-酮基序。值得注意的是,该方法可提供具有易于可烯化的官能团的产品,这些官能团与传统的Pd催化条件不相容。