Herein, we report that merging palladium catalysis with hydrogen atom transfer (HAT) photocatalysis enabled direct arylations and alkenylations of aldehyde C–H bonds, facilitating visible light-catalyzed construction of a variety of ketones. Tetrabutylammonium decatungstate and anthraquinone were found to act as synergistic HAT photocatalysts. Density functional theory calculations suggested a Pd0–PdII–PdIII–PdI–Pd0
在本文中,我们报道了
钯催化与氢原子转移(HAT)光催化的合并使醛C–H键的直接芳基化和烯基化成为可能,从而促进了可见光催化的各种酮的构建。发现四丁基
癸酸铵和
蒽醌可作为HAT的协同光催化剂。密度泛函理论计算表明,Pd 0 -Pd II -Pd III -Pd I -Pd 0途径,并揭示了在存在KHCO 3的情况下,Pd 0催化剂和光催化剂的再生同时发生。这种再生具有低能垒,促进了
钯催化循环与光催化循环的有效耦合。本文报道的工作表明,HAT光催化在
钯催化的交叉偶联和CH官能化反应中的进一步应用有望成功。