نتایج جستجو برای: aromatic amination

تعداد نتایج: 44024  

Journal: :ChemistrySelect 2022

The reductive amination of aromatic aldehydes and amines, performed in the Brønsted acidic ionic liquid [Et3NH][HSO4], using sodium borohydride as a reducing agent is reported. In this protocol, plays crucial role efficiently converting to amines excellent yields, without formation side products. presence imine was generated situ from reaction between underwent smooth reduction with borohydride...

Journal: :Journal of the American Chemical Society 2012
Jeffrey S Arnold Hien M Nguyen

The rhodium-catalyzed regio- and enantioselective amination of racemic tertiary allylic trichloroacetimidates with a variety of aniline nucleophiles is a direct and efficient route to chiral α,α-disubstituted allylic N-arylamines. We describe the first dynamic kinetic asymmetric transformations of racemic tertiary allylic electrophiles with anilines utilizing a chiral diene-ligated rhodium cata...

2004
John F. Hartwig

Studies on the development of palladium, nickel, and rhodium catalysts for the hydroamination of dienes and vinylarenes are described. Enantioselective catalysts based on palladium have been developed for the addition of arylamines to dienes and for Markovnikov addition of arylamines to vinylarenes. In addition, nickel catalysts for the addition of aliphatic amines to dienes have been developed...

Journal: :ACS Catalysis 2021

The reductive amination of benzoic acid and its derivatives would be an effective addition to current synthesis methods for benzylamine. However, with technology it is very difficult keep the aromaticity intact when starting from acid, salt wastes are often generated in process. Here, we report a heterogeneous catalytic system such amination, requiring solely H2 NH3 as reactants. Ag/TiO2 or Au/...

2015
Simon Sung D Christopher Braddock Alan Armstrong Colin Brennan David Sale Andrew J P White Robert P Davies

A series of copper(I) alkylamide complexes have been synthesised; copper(I) dicyclohexylamide (1), copper(I) 2,2,6,6-tetramethylpiperidide (2), copper(I) pyrrolidide (3), copper(I) piperidide (4), and copper(I) benzylamide (5). Their solid-state structures and structures in [D6 ]benzene solution are characterised, with the aggregation state in solution determined by a combination of DOSY NMR sp...

2006
Youssef Harrak Manel Romero Pere Constans Maria D. Pujol

Abstract: Aryl halides and aryl triflates (triflate = trifluoromethanesulfonyl) are coupled with N-compounds to give the corresponding arylamines or arylhydrazines in the presence of a palladium catalyst, a suitable ligand, and a base. Catalyst systems consisting of palladium (II) and BINAP or triphenylphosphine are generally effective for the amination of a wide range of aryl halides and aryl ...

Journal: :Chemcatchem 2023

Construction of C−N bond is a central process in organic synthesis. Typically, it relies on noble-metal catalysts and prefunctionalized substrates, such as aryl halides. Alternative more appealing method direct C−H amination hydrocarbons that based intrinsic reactivity the situ generated radical cations, which are electrophilic compared to their closed-shell precursors. In this work, we employ ...

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