Chemoselective Reductive Amination of Aldehydes and Ketones by Dibutylchlorotin Hydride-HMPA Complex
作者:Toshihiro Suwa、Erika Sugiyama、Ikuya Shibata、Akio Baba
DOI:10.1055/s-2000-6273
日期:——
Reductive amination of various aldehydes and ketones has been performed effectively by pentacoordinate chloro-substituted tin hydride complex, Bu2SnClH-HMPA. The tin reagent worked particularly well for the case using weakly basic aromatic amines as starting substrates. Stoichiometric amounts of a substrate and a reducingagent were adequate for the reaction. The Sn-Cl bond in the complex plays an
Diastereo- and enantioselective reductive amination of cycloaliphatic ketones by preformed chiral palladium complexes
作者:Armando Cabrera、Pankaj Sharma、F. Javier Pérez-Flores、Luis Velasco、J. Luis Arias、Laura Rubio-Pérez
DOI:10.1039/c4cy00058g
日期:——
An efficient preformed chiral palladium catalyzed direct diastereo- and enantioselectivereductive amination of un- and substituted cycloaliphatic ketones with primary aryl amines has been developed.
Zinc-promoted, iridium catalyzed reductive alkylation of primary amines with aliphatic ketones in aqueous medium
作者:Renato A. da Silva、Lothar W. Bieber
DOI:10.1016/j.tetlet.2009.11.107
日期:2010.1
The reductive alkylation of primary aromatic and aliphaticamines with aliphatic ketones has been achieved in aqueous acidic medium using commercially available, non-activated zinc dust catalyzed by a very small quantity of iridium bromide. Anilines react well in aqueous formic acid, whereas monoalkylamines require 1,4-dioxane as a co-solvent and sulfuric acid as the proton source. A plausible mechanism
An Aminopyridinato Titanium Catalyst for the Intramolecular Hydroaminoalkylation of Secondary Aminoalkenes
作者:Jaika Dörfler、Besnik Bytyqi、Sascha Hüller、Nicola M. Mann、Christian Brahms、Marc Schmidtmann、Sven Doye
DOI:10.1002/adsc.201500287
日期:2015.7.6
2‐(methylamino)pyridinato titanium complex initially synthesized by Kempe is used as catalyst for efficient intramolecularhydroaminoalkylation reactions of secondaryaminoalkenes. The corresponding reactions of N‐aryl‐substituted 1‐aminohept‐6‐enes and 1‐aminohex‐5‐enes directly give access to 2‐methylcyclohexyl‐ or 2‐methylcyclopentylamines in good yields. In addition, intramolecularhydroaminoalkylations of an N‐alkyl‐substituted