3-Halochromones Through Oxidative α-Halogenation of Enaminones and its Photophysical Investigation: Another Case of Photo-induced Partially Aromatised Intramolecular Charge Transfer?,Chemistry - An Asian Journal

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3-Halochromones Through Oxidative α-Halogenation of Enaminones and its Photophysical Investigation: Another Case of Photo-induced Partially Aromatised Intramolecular Charge Transfer?
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2023-12-15 , DOI: 10.1002/asia.202300852
José S S Neto ₁ , Filipe T Coelho ₁ , Carlos V Doerner ₂ , Antonio L Braga ₂ , Luciano M Lião ₁ , Felipe L Coelho ₁

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The work reports a versatile method to access 3-chloro-, 3-bromo-, or 3-iodo-4H-chromen-4-ones from oxidative α-halogenation of enaminones. The Oxone®/KX system provides a wide range of 3-halo-4H-chromen-4-ones in good to excellent yields with great functional group tolerance. The analysis of the photophysical properties revealed a dual fluorescence emission in the violet-to-cyan assigned to a partially aromatised intramolecular charge transfer mechanism.

中文翻译：

通过烯胺酮氧化 α-卤化的 3-卤代色酮及其光物理研究：光诱导部分芳香化分子内电荷转移的另一个案例？

该工作报告了一种从烯胺酮的氧化 α-卤化反应中获得 3-氯-、3-溴-或 3-碘-4 H-铬-4-酮的通用方法。 Oxone ® /KX 系统可提供多种 3-halo-4 H -chromen-4-one，产率良好至优异，且具有出色的官能团耐受性。光物理性质的分析揭示了紫罗兰色到青色的双荧光发射，这归因于部分芳香化的分子内电荷转移机制。

更新日期：2023-12-15

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