3‐Halochromones Through Oxidative α‐Halogenation of Enaminones and its Photophysical Investigation: Another Case of Photo‐induced Partially Aromatised Intramolecular Charge Transfer?
作者:José S. S. Neto、Filipe T. Coelho、Carlos V. Doerner、Antonio L. Braga、Luciano M. Lião、Felipe L. Coelho
DOI:10.1002/asia.202300852
日期:2024.1.15
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.
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。