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
Highly economical and direct amination of sp<sup>3</sup> carbon using low-cost nickel pincer catalyst
作者:Andrew Brandt、Ambar B. RanguMagar、Peter Szwedo、Hunter A. Wayland、Charlette M. Parnell、Pradip Munshi、Anindya Ghosh
DOI:10.1039/d0ra09639c
日期:——
first time, we report the use of an amide-based nickel pincer catalyst (1) for direct alkylation of amines viaactivation of sp3 C-H bonds. The reaction was accomplished using a 0.2 mol% catalyst and no additional activatingagents other than the base. Upon optimization, it was determined that the ideal reaction conditions involved solvent dimethyl sulfoxide at 110 °C for 3 h. The catalyst demonstrated
Benzylamines via Iron-Catalyzed Direct Amination of Benzyl Alcohols
作者:Tao Yan、Ben L. Feringa、Katalin Barta
DOI:10.1021/acscatal.5b02160
日期:2016.1.4
with simpler amines through the borrowing hydrogen methodology, producing a variety of substituted secondary and tertiary benzylamines in moderate to excellent yields for the first time with an iron catalyst. Notably, we explore the versatility of this methodology in the one-pot synthesis of nonsymmetric tertiaryamines, sequential functionalization of diols with distinctly different amines, and the synthesis
<i>cine</i>-Silylative Ring-Opening of α-Methyl Azacycles Enabled by the Silylium-Induced C–N Bond Cleavage
作者:Jianbo Zhang、Sukbok Chang
DOI:10.1021/jacs.0c05241
日期:2020.7.22
exo-dehydrogenation of alicyclic amine, (ii) hydrosilylation of resultant enamine, (iii) silylium-induced cis-β-amino elimination to open the ring skeleton, and (iv) hydrosilylation of terminal olefin. The present borane catalysis also works efficiently for the C-Nbondcleavage of acyclic tertiary amines. On the basis of experimental and computational studies, the silicon atom was elucidated to play a pivotal
Alkylation of Amines Via Tandem Hydroaminomethylation Using Imino-Pyridine Complexes of Rhodium as Catalyst Precursors
作者:Jacquin October、Selwyn F. Mapolie
DOI:10.1007/s10562-019-02998-y
日期:2020.4
Abstract Novel cationic Rh(I) imino-pyridine complexes were evaluated as catalyst precursors in the hydroaminomethylation of 1-octene in conjunction with both primary (aniline and benzylamine) and secondaryamines (piperidine). These complexes were found to be highly efficient catalysts in mediating a one-pot hydroaminomethylation reaction. High chemoselectivities towards the target secondary and tertiary