Al2O3-supported Pd nanoclusters with an average particle size of 1.8 nm act as a reusable catalyst for the selective cross-coupling of amines. The reaction is a structure-sensitive reaction, demanding coordinatively unsaturated Pd atoms on a metallic nanocluster. The support also affects the activity, an amphoteric oxide (Al2O3) is most effective.
By catalyst and condition screening, a simple Cu(I)/TEMPO-catalyst system was found to be an active and highly effective catalyst for the aerobic oxidation of amines to imines in open air at room temperature under neat conditions. This new method provided a mild, efficient, and practical alternative for the synthesis of the useful imines directly from primary and secondary amines.
energy/electron-transfer represents the central processes for photosynthesis. However, it's still a challenge to develop a heavy-atom-free (HAF) strategy to improve the sensitizing ability of polymeric photosensitizers. Herein, we propose a new protocol to significantly improve the photosensitization by decorating mother conjugated microporous polymer (CMP-1) with polycyclic aromatichydrocarbons (PAHs)
By screening the copper catalysts, ligands, and the reaction conditions, a simple CuCl/DMEDA/TEMPO catalyst system readily available from commercial sources is developed for a direct and selective synthesis of the useful nitriles by an aerobic oxidation reaction of primaryamines using air as an advantageous oxidantunder mild conditions.
Metal-free nitrogen -doped carbon nanosheets: a catalyst for the direct synthesis of imines under mild conditions
作者:Kaizhi Wang、Pengbo Jiang、Ming Yang、Ping Ma、Jiaheng Qin、Xiaokang Huang、Lei Ma、Rong Li
DOI:10.1039/c9gc00908f
日期:——
synthesis of imines from amines is 67.39 kJ mol−1, which has been performed to testify that the catalytic performances are rational. Via catalyst characterizations and experimental data, graphitic-N has been proven to be the active site of the catalyst. Hence, this study is beneficial to comprehend the mechanism of action of a metal-free N-doped carbon catalyst in the formation of imines.