Palladium Nanoparticles Stabilized by Metal-Carbon Covalent Bonds as an Expeditious Catalyst for the Oxidative Dehydrogenation of Nitrogen Heterocycles
作者:Xiao-Tao Sun、Jie Zhu、Yun-Tao Xia、Lei Wu
DOI:10.1002/cctc.201700370
日期:2017.7.7
The first method for the dehydrogenation of nitrogen heterocycles catalyzed by a palladium nanocatalyst was developed. Carbon–metal covalent‐bond‐stabilized nanoparticles were found to be efficient for the dehydrogenation process in the presence of tert‐butyl hydroperoxide. A variety of N‐heterocycles were transformed into functionalized quinolines in medium to excellent yields in water as the solvent
be hydrogenated with medium to excellent yields within 10 min. Complete deuteriumincorporation from stoichiometric D2O onto substrates further exemplifies the H/D atom sources. Mechanism studies reveal that the reduction proceeds with initial 1,2‐addition, in which diboronic acid synergistically activates substrates and water via a six‐membered ring transition state.