and kinetically competent catalysts for this transformation. The fleeting transmetalation intermediate has been successfully synthesized through an alternative synthetic organometallic pathway at lower temperature, allowing for in situ NMR study of the C–N bond reductive elimination step. This study addresses key factors governing the mechanism of the nickel-catalyzed Buchwald–Hartwig amination process
Nickel(II)–N<sup>Λ</sup>N<sup>Λ</sup>O Pincer Type Complex-Catalyzed N-alkylation of Amines with Alcohols via the Hydrogen Autotransfer Reaction
作者:Gunasekaran Balamurugan、Rengan Ramesh、Jan Grzegorz Malecki
DOI:10.1021/acs.joc.0c00530
日期:2020.6.5
A highly sustainable catalytic protocol for the coupling of alcohols and amines for selective monoalkylated amines using Ni(II)–NΛNΛO pincer type complexes through the borrowing hydrogen methodology is described. An array of Ni(II) catalysts (1–3) was synthesized and characterized by various spectral and analytical methods. Furthermore, the distorted square planar geometry of the complexes (1 and 2)
Catalyst- and solvent-free efficient access to <i>N</i>-alkylated amines <i>via</i> reductive amination using HBpin
作者:Vipin K. Pandey、Somnath Bauri、Arnab Rit
DOI:10.1039/d0ob00740d
日期:——
conditions for the synthesis of structurallydiverse secondary amines has been uncovered. This one-pot protocol works efficiently at room temperature and is compatible with a wide range of sterically and electronically diversealdehydes and primary amines. Notably, this simple process offers scalability, excellent functional group tolerance, chemoselectivity, and is also effective at the synthesis of biologically
Direct reductivealkylation of amines with carboxylic acid is carried out by using an inexpensive, air‐stable cobalt/triphos catalytic system with molecular hydrogen as the reductant. This efficient synthetic method proceeds through reduction and condensation, followed by reduction of the in situ‐generated imine into the amine in a green catalytic process.
Enhancing the efficiency of the ruthenium catalysts in the reductive amination without an external hydrogen source
作者:Artemy R. Fatkulin、Oleg I. Afanasyev、Alexey A. Tsygankov、Denis Chusov
DOI:10.1016/j.jcat.2021.12.018
日期:2022.1
Catalytic reductive reactions are essential for laboratory and industrial-scale organicsynthesis. However, the nowadays trend is the development of new, more and more complicated reducing systems, which hinders the application of such highly efficient approaches in practice. Another way to achieve the highly active systems is enhancing the activity of the earlier developed catalysts with simple structures