Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States.
Org Lett. 2023 Feb 17;25(6):907-911. doi: 10.1021/acs.orglett.2c04122. Epub 2023 Feb 6.
A photocatalytic method for phenol and alkenylphenol oxidative coupling is reported using an inexpensive heterogeneous titanium dioxide photocatalyst with air and visible light. During the coupling process, the Ti-substrate complex is activated under visible light through a ligand to metal charge transfer effect, and the diphenol adduct is proposed to form through a radical cation. The heterogeneous TiO catalyst remains stable throughout the reaction and can be easily removed and reused multiple times.
本文报道了一种利用廉价的非均相二氧化钛光催化剂，在空气和可见光条件下，实现苯酚和烯基苯酚氧化偶联的光催化方法。在偶联过程中，Ti-基质络合物通过配体到金属电荷转移效应在可见光下被激活，并且通过自由基阳离子提出形成二酚加合物。该非均相 TiO 催化剂在整个反应过程中保持稳定，并且可以很容易地多次去除和重复使用。
