Modular synthesis of 1,4-diketones through regioselective bis-acylation of olefins by merging NHC and photoredox catalysis
作者:Jun-Long Li、Si-Lin Yang、Qing-Song Dai、Hua Huang、Lu Jiang、Qing-Zhu Li、Qi-Wei Wang、Xiang Zhang、Bo Han
DOI:10.1016/j.cclet.2023.108271
日期:2023.3
Efficient and modular synthesis of structurally diverse 1,4-diketones from readily available building blocks represents an essential but challenging task in organic chemistry. Herein, we report a multi-component, regioselective bis-acylation of olefins by merging NHC organocatalysis and photoredox catalysis. With this protocol, a broad range of 1,4-diketones could be rapidly assembled using bench-stable
从容易获得的结构单元中高效、模块化地合成结构多样的 1,4-二酮是有机化学中一项重要但具有挑战性的任务。在此,我们报道了通过结合 NHC 有机催化和光氧化还原催化实现烯烃的多组分、区域选择性双酰化。通过该方案,可以使用实验室稳定的原料材料快速组装多种 1,4-二酮。通过敏感性筛选进一步评估了该方法的稳健性,并观察到良好的重现性。此外,二酮产物可以很容易地转化为官能化杂环,例如多取代的呋喃、吡咯和哒嗪。机理研究揭示了 NHC 和光氧化还原双催化自由基反应机理。