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 aliphatic amines 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
伯芳族和脂族胺与脂族酮的还原烷基化反应已在酸性水溶液中完成,使用的是市售的,由少量溴化铱催化的未活化锌粉。苯胺在甲酸水溶液中反应良好,而单烷基胺则需要1,4-二恶烷作为助溶剂,硫酸需要作为质子源。提出了通过低价氢化铱物质的合理机理。