An unprecedented dual photoredox/palladium-catalyzed iminyl-radical-mediated C–C bond cleavage and directed ortho C–H acylation of 2-arylpyridines by using oxime esters is described. Oxime esters can serve as efficient acyl sources through formation of the corresponding acyl radicals by photoredox-catalyzed iminyl-radical-mediated C–C bond cleavage. This redox-neutral protocol features excellent regioselectivity, a broad substrate scope, and good functional-group tolerance with respect to both components, giving a broad range of aryl ketones with generally good yields.

中文翻译：

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双光氧化还原/钯催化 2-芳基吡啶与肟酯的 C–H 酰化

描述了一种前所未有的双光氧化还原/钯催化亚胺基-自由基介导的 C-C 键裂解和使用肟酯的 2-芳基吡啶的定向邻位 C-H 酰化。肟酯可以通过光氧化还原催化亚胺基介导的 C-C 键裂解形成相应的酰基自由基作为有效的酰基来源。这种氧化还原中性方案具有出色的区域选择性、广泛的底物范围和对两种组分的良好官能团耐受性，提供广泛的芳基酮，通常具有良好的产率。