Enhanced Hydride Donation Achieved Molybdenum Catalyzed Direct <i>N</i>-Alkylation of Anilines or Nitroarenes with Alcohols: From Computational Design to Experiment
作者:Weikang Li、Ming Huang、Jiahao Liu、Yong-Liang Huang、Xiao-Bing Lan、Zongren Ye、Cunyuan Zhao、Yan Liu、Zhuofeng Ke
DOI:10.1021/acscatal.1c02956
日期:2021.8.20
An example of homogeneous Mo-catalyzed direct N-alkylation of anilines or nitroarenes with alcohols is presented. The DFT aimed design suggested the easily accessible bis-NHC-Mo(0) complex features a strong hydride-donating ability, achieving effective N-alkylation of anilines or challenging nitroarenes with alcohols. The enhanced hydride-donating strategy should be useful in designing highly active
介绍了均相 Mo 催化的苯胺或硝基芳烃与醇的直接N-烷基化的例子。DFT 目标设计表明,易于获得的双-NHC-Mo(0) 配合物具有强大的氢化物供体能力,可实现苯胺的有效N-烷基化或用醇挑战硝基芳烃。增强的氢化物捐赠策略应该有助于设计用于借氢转化的高活性系统。
Efficient nickel-catalysed<i>N</i>-alkylation of amines with alcohols
作者:Anastasiia Afanasenko、Saravanakumar Elangovan、Marc C. A. Stuart、Giuseppe Bonura、Francesco Frusteri、Katalin Barta
DOI:10.1039/c8cy01200h
日期:——
selective N-alkylation of amines with alcohols, that is in situ generated from Ni(COD)2 and KOH under ligand-free conditions. This novel method is very efficient for the functionalization of aniline and derivatives with a wide range of aromatic and aliphatic alcohols as well as diols and exhibits excellent functionalgroup tolerance including halides, benzodioxane and heteroaromatic groups. Several TEM measurements
Heterogeneous Ni Catalysts for N-Alkylation of Amines with Alcohols
作者:Ken-ichi Shimizu、Naomichi Imaiida、Kenichi Kon、S. M. A. Hakim Siddiki、Atsushi Satsuma
DOI:10.1021/cs4001267
日期:2013.5.3
Ni/θ-Al2O3, which suggests the cooperation of the acid–basesite of θ-Al2O3. For a series of Ni/θ-Al2O3 catalysts with different particle size, the turnover frequency (TOF) per surface Ni increases with decreasing Ni mean particle size, indicating that low-coordinated Ni species and/or metal–support interface are active sites. From these results, we propose that the active site for this reaction is metal–support
已经制备了负载在各种载体上的镍纳米颗粒(Ni / MO x),并研究了胺与醇的N-烷基化反应。在这些催化剂中,镍/θ-Al系2 Ó 3通过原位H制备2的NiO -还原/θ-Al系2 ö 3烷烃具有最高的活性,在无添加剂条件下,它是苯胺和脂族胺与各种醇(苄基和脂族醇)的烷基化反应的可重复使用的多相催化剂。伯胺被转化为仲胺,仲胺被转化为叔胺。对于苯胺与脂肪醇的反应,该催化剂比基于贵金属的最新催化剂显示出更高的周转数(TON)。机理研究表明,反应是通过氢借入机理进行的。Ni催化剂的活性取决于载体材料的性质。酸碱双功能载体比碱性或酸性载体具有更高的活性,这表明载体上的酸碱位点是必需的。2 Ó 3,这表明θ-Al的酸-碱位点的合作2 Ó 3。对于一系列的Ni /的θ-Al系2 ö 3种催化剂具有不同的颗粒大小,转换频率(TOF)每面的Ni增加随镍平均粒径,这表明低配位的Ni物种和/或金属-支撑界面是
Reusable Co-nanoparticles for general and selective <i>N</i>-alkylation of amines and ammonia with alcohols
作者:Zhuang Ma、Bei Zhou、Xinmin Li、Ravishankar G. Kadam、Manoj B. Gawande、Martin Petr、Radek Zbořil、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1039/d1sc05913k
日期:——
A general cobalt-catalyzed N-alkylation of amines with alcohols by borrowing hydrogen methodology to prepare different kinds of amines is reported. The optimal catalyst for this transformation is prepared by pyrolysis of a specific templated material, which is generated in situ by mixing cobalt salts, nitrogen ligands and colloidal silica, and subsequent removal of silica. Applying this novel Co-nanoparticle-based
replacement in catalysis is especially interesting if different catalytic reactivity is observed. We report, here, on the selective manganese-catalyzed base-switchable synthesis of N-alkylated amines or imines. In both reactions, borrowing hydrogen/hydrogen autotransfer (N-alkyl amine formation) or dehydrogenative condensation (imineformation), we start from the same amines and alcohols and use the same