Effective reductive amination of carbonyl compounds with hydrogen catalyzed by iridium complex in organic solvent and in ionic liquid
作者:Daisuke Imao、Shoichiro Fujihara、Takeshi Yamamoto、Tetsuo Ohta、Yoshihiko Ito
DOI:10.1016/j.tet.2005.05.024
日期:2005.7
compounds with amines has been achieved using homogenous iridium catalyst and gaseous hydrogen. It appeared that the cationic iridium catalyst, [Ir(cod)2]BF4, without any other ligands was sufficient for the reaction. For the DRA of the ketone substrates, an ionic liquid, [Bmim]BF4, was found to be superior to the other organic solvent used. Especially, the counter anion of the ionic liquid has a significant
使用均相铱催化剂和气态氢已实现了羰基化合物与胺的直接还原胺化(DRA)。似乎没有任何其他配体的阳离子铱催化剂[Ir(cod)2 ] BF 4足以进行反应。对于酮底物的DRA ,发现离子液体[Bmim] BF 4优于所使用的其他有机溶剂。特别地,离子液体的抗衡阴离子对选择性具有重大影响,同时,发现高反应温度对于优异的选择性至关重要。