Synthesis of Enantioenriched Amines by Iron‐Catalysed Amination of Alcohols Employing at Least One Achiral Substrate
作者:Giovanni Bottari、Anastasiia Afanasenko、Antonio A. Castillo‐Garcia、Ben L. Feringa、Katalin Barta
DOI:10.1002/adsc.202100231
日期:2021.12.21
The synthesis of a broad range of enantioenriched amines by the direct Fe-catalysed coupling of amines with alcohols through the borrowing hydrogen strategy, while at least one of these substrates is achiral is reported. When starting from α-chiral amines and achiral alcohols, a wide range of enantioenriched amine products, including N-heterocyclic moieties can be obtained with complete retention of
The Mechanism of Hydroaminoalkylation Catalyzed by Group 5 Metal Binaphtholate Complexes
作者:Alexander L. Reznichenko、Kai C. Hultzsch
DOI:10.1021/ja211945m
日期:2012.2.15
The intermolecular hydroaminoalkylation of unactivated alkenes and vinyl arenes with secondary amines occurs readily in the presence of tantalum and niobium binaphtholate catalysts with high regio- and enantioselectivity (up to 98% ee). Mechanistic studies have been conducted in order to determine the kinetic order of the reaction in all reagents and elucidate the rate- and stereodetermining steps
Metal and organo-catalysed asymmetric hydroaminomethylation of styrenes
作者:Barbara Villa-Marcos、Jianliang Xiao
DOI:10.1016/s1872-2067(14)60246-1
日期:2015.1
A new protocol that enables asymmetric hydroaminomethylation of styrenes to afford chiral amines has been developed. Catalysed by an Rh-phosphine species and a chiral phosphoric acid, styrenes are converted into beta-chiral amines with good enantioselectivities under syngas in the presence of an amine and Hantzsch ester. The reaction involves two key steps, hydroformylation and reductive amination, with the former catalysed by the Rh species whilst the latter by the phosphoric acid. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Enantioselective Hydroaminomethylation of Olefins Enabled by Rh/Brønsted Acid Relay Catalysis
作者:Jing Meng、Xing-Han Li、Zhi-Yong Han
DOI:10.1021/acs.orglett.7b00100
日期:2017.3.3
Herein, by employing a rhodium catalyst with a commercial ligand and a phosphoric acid catalyst, highly chemo-, regio-, and enantioselective hydroaminomethylation of olefins is realized through a relay catalytic hydroformylation/dynamic kinetic reductive amination process. The method features mild conditions (1 bar of syngas, room temperature in most cases), high yields (up to 99%), and high enantioselectivities
Catalytic Asymmetric Reductive Amination of Aldehydes via Dynamic Kinetic Resolution
作者:Sebastian Hoffmann、Marcello Nicoletti、Benjamin List
DOI:10.1021/ja065404r
日期:2006.10.1
A novel organocatalytic asymmetric reductive amination of aldehydes has been developed. Treating racemic alpha-branched aldehydes with p-anisidine and a Hantzsch ester in the presence of our previously developed phosphoric acid catalyst, TRIP, gave beta-branched secondary amines in excellent yields and enantioselectivities via an efficient dynamic kinetic resolution. The process is applicable to several