possessing biphenyltetrazole was discovered to be potent human ChemR23 inhibitors. We initially tried to improve the potency of compound 1, which was found through in-house screening using the human plasmacytoid dendritic cell (pDC)-like cell line CAL-1. The introduction of a chiralmethyl moiety at a benzylic position in a center of compound 1 showed a large impact on the inhibitory activity against calcium
Designing New Magnesium Pincer Complexes for Catalytic Hydrogenation of Imines and <i>N</i>-Heteroarenes: H<sub>2</sub> and N–H Activation by Metal–Ligand Cooperation as Key Steps
difficulty in heterolytic cleavage of the H–H bond. Employing aromatization/de-aromatization metal–ligand cooperation (MLC) highly enhances the H2 activationprocess, offering an efficient approach for the hydrogenation of unsaturated molecules catalyzed by main-group metals. Herein, we report a series of new magnesium pincer complexes prepared using PNNH-type pincerligands. The complexes were characterized
利用主族金属替代过渡金属进行均相催化成为近年来的研究热点。然而,由于H-H键的异裂解困难,它们在催化氢化中的应用较少。采用芳构化/去芳构化金属-配体合作 (MLC) 可显着增强 H 2活化过程,为主族金属催化的不饱和分子氢化提供了一种有效的方法。在此,我们报告了一系列使用 PNNH 型钳配体制备的新型镁钳络合物。通过核磁共振和 X 射线单晶衍射对配合物进行了表征。H 2的可逆激活开发了使用这些钳形络合物的 MLC 的 N-H 键。使用新的镁配合物,实现了醛亚胺和酮亚胺的均匀催化氢化,以优异的收率提供仲胺。对照实验和 DFT 研究表明,涉及 MLC 的途径有利于氢化反应。此外,该高效催化扩展到喹啉和其他N-杂芳烃的选择性加氢,首次展示了早期主族金属配合物均相催化N-杂芳烃加氢的实例。该研究为镁化合物催化的C=N键加氢提供了新的策略,丰富了主族金属催化的研究。