A Bifunctional MOF Catalyst Containing Metal–Phosphine and Lewis Acidic Active Sites
作者:Ram R. R. Prasad、Daniel M. Dawson、Paul A. Cox、Sharon E. Ashbrook、Paul A. Wright、Matthew L. Clarke
DOI:10.1002/chem.201803094
日期:2018.10.12
Post‐synthetic modification of the hafnium metal–organicframework MOF‐808(Hf) to include triarylphosphine ligands is reported. Sulfonated phenylphosphines are incorporated without oxidation to give a “MOF ligand” that can complex late transition metals such as Ir and Rh to give a bifunctional catalyst containing both metal–phosphine complexes and the Lewis acidic framework hafnium metalsites. The
The Ru(dppbsa)-catalyzed reductive amination of ketones with nitroarenes and nitriles using H2 as the environmentally benign hydrogen surrogate is developed in this study. Cross-experiments demonstrated that both reactions are initiated by the reduction of nitroarenes or nitriles to the corresponding amines, followed by condensation with ketones to give imines and thereafter hydrogenation. However
本研究开发了使用 H 2作为环境友好型氢替代物的 Ru(dppbsa) 催化的酮与硝基芳烃和腈的还原胺化反应。交叉实验表明,这两个反应都是通过将硝基芳烃或腈还原成相应的胺,然后与酮缩合得到亚胺,然后氢化来引发的。然而,不能完全排除在硝基芳烃或腈还原过程中形成氨基连接的 Ru 络合物,然后进行原位亲核 C-N 偶联的途径。这种新开发的通用方法具有良好的官能团耐受性,为构建仲胺基序的均相催化剂提供了一个新颖的设计平台。
Han, Zhaobin; Wang, Zheng; Zhang, Xumu, Angewandte Chemie - International Edition, 2009, vol. 48, p. 5345 - 5349
A Highly Enantioselective Organocatalytic Method for Reduction of Aromatic
<i>N</i>
‐Alkyl Ketimines
作者:Chao Wang、Xinjun Wu、Li Zhou、Jian Sun
DOI:10.1002/chem.200801479
日期:2008.10.10
Zinc-Catalyzed Reduction of Imines by Triethylsilane
作者:K. Anil Kumar、T. S. Sreelekha、K. N. Shivakumara、K. C. Prakasha、D. Channe Gowda
DOI:10.1080/00397910802521246
日期:2009.3.25
Low-cost zinc is employed as a catalyst along with triethylsilane (TES) in a simple, straightforward, chemoselective reduction of various aldimines and ketimines to the corresponding secondary amines at room temperature and pressure.