Dual Photoredox/Palladium-Catalyzed C–H Acylation of 2-Arylpyridines with Oxime Esters
作者:Xiao-Peng Liu、Jia-Rong Chen、Bin-Qing He、Yuan Gao、Peng-Zi Wang、Hong Wu、Hong-Bin Zhou
DOI:10.1055/s-0040-1707252
日期:2021.3
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
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。