Ruthenium-Catalyzed Reductive Amination without an External Hydrogen Source
作者:Pavel N. Kolesnikov、Niyaz Z. Yagafarov、Dmitry L. Usanov、Victor I. Maleev、Denis Chusov
DOI:10.1021/ol503595m
日期:2015.1.16
A ruthenium-catalyzed reductiveaminationwithout an externalhydrogensource has been developed using carbon monoxide as the reductant and ruthenium(III) chloride (0.008–2 mol %) as the catalyst. The method was applied to the synthesis of antianxiety agent ladasten.
Carbon monoxide-driven osmium catalyzed reductive amination harvesting WGSR power
作者:Klim O. Biriukov、Mikhail M. Vinogradov、Oleg I. Afanasyev、Dmitry V. Vasilyev、Alexey A. Tsygankov、Maria Godovikova、Yulia V. Nelyubina、Dmitry A. Loginov、Denis Chusov
DOI:10.1039/d1cy00695a
日期:——
First osmium-catalyzed reductive amination under the water gas–shift reaction conditions was developed. Proposed catalytic system demonstrates high performance even at the catalyst loading as low as 0.0625 mol%.
Enhanced Catalytic Activity of Oxygen-Tethered Ir<sup>III</sup>
NHC Complexes in Aqueous Transfer Hydrogenative Reductive Amination Reactions: Experimental Kinetic and Mechanistic Study
The synthesis and characterization of seven new IrIII complexes containing o‐phenoxide or o‐naphthoxide chelated N‐heterocyclic carbene ligands is reported herein. The crystal structures of six of the complexes have been determined. These complexes efficiently catalyze the transfer hydrogenative reductive amination (RA) of carbonyls and amines in water. Amongst the complexes tested, the introduction
本文报道了七种新的Ir III配合物的合成和表征,这些配合物含有邻苯氧或邻萘氧螯合的N杂环卡宾配体。已经确定了六个配合物的晶体结构。这些络合物有效地催化水中羰基和胺的转移氢化还原胺化(RA)。在经过测试的配合物中,引入了o环烷氧基在咪唑基NHC配体的氮原子上大大提高了催化活性。该催化系统具有广泛的底物范围,可以以优异的产率合成多种胺,并具有高达490(对于酮)和14800(对于醛)的高周转率。已经通过NMR光谱和动力学测量研究了RA与邻芳基氧化物螯合的NHC-Ir III催化剂的反应机理。这些研究表明,转移氢化(TH)受氢化物形成步骤的限制。1 H NMR研究的结果表明,邻萘环氧化物螯合催化剂(3 g)的催化活性高于邻苯氧酚被螯合的一(3 b)可以部分归因于氢化铱的快速形成,而氢化铱是RA反应中的关键中间体。
An Easy and General Iron-catalyzed Reductive Amination of Aldehydes and Ketones with Anilines
A will of iron: An iron‐catalyzedreductiveamination of aldehydes and ketones with anilines using molecular hydrogen is presented. Under mild conditions, high yields for a broad range of aryl, alkyl, and heterocyclic ketones as well as aldehydes are achieved.
Thiourea-Catalyzed Direct Reductive Amination of Aldehydes
作者:Dirk Menche、Fatih Arikan
DOI:10.1055/s-2006-939052
日期:——
A hydrogen-bond-catalyzed direct reductive amination of aldehydes is reported. The acid- and metal-free process uses thiourea as organocatalyst and the Hantzsch ester for transfer-hydrogenation and allows for the high-yielding synthesis of diverse amines.