Primary Amines by Transfer Hydrogenative Reductive Amination of Ketones by Using Cyclometalated Ir<sup>III</sup>Catalysts
作者:Dinesh Talwar、Noemí Poyatos Salguero、Craig M. Robertson、Jianliang Xiao
DOI:10.1002/chem.201303541
日期:2014.1.3
Cyclometalated iridium complexes are found to be versatile catalysts for the direct reductive amination (DRA) of carbonyls to give primary amines under transfer‐hydrogenation conditions with ammonium formate as both the nitrogen and hydrogen source. These complexes are easy to synthesise and their ligands can be easily tuned. The activity and chemoselectivity of the catalyst towards primary amines
已发现环金属化铱配合物是通用的催化剂,用于羰基的直接还原胺化(DRA),在转移加氢条件下以甲酸铵作为氮源和氢源生成伯胺。这些复合物易于合成,其配体易于调节。催化剂对伯胺的活性和化学选择性极好,底物与催化剂之比(S / C)为1000是可行的。芳族和脂族伯胺均以高收率获得。此外,对于β-酮醚已经实现了均相催化的转移加氢DRA的第一个实例,从而产生了相应的β-氨基醚。此外,通过这种方法还可以以极高的收率获得非天然α-氨基酸。