Modular Tuning of Electrophilic Reactivity of Iridium Nitrenoids for the Intermolecular Selective α-Amidation of β-Keto Esters
作者:Minhan Lee、Hoimin Jung、Dongwook Kim、Jung-Woo Park、Sukbok Chang
DOI:10.1021/jacs.0c04344
日期:2020.7.15
herein an Ir-catalyzed intermolecular amino group transfer to β-keto esters (amides) to access α-aminocarbonyl products with excellent chemoselectivity. The key strategy was to engineer electrophilicity of the putative Ir-nitrenoids by tuning electronic property of the κ2-N,O chelating ligands, thus facilitating nucleophilic addition of enol π-bonds of 1,3-dicarbonyl substrates.
我们在此报告了 Ir 催化的分子间氨基转移到 β-酮酯(酰胺)以获取具有优异化学选择性的 α-氨基羰基产物。关键策略是通过调节 κ2-N,O 螯合配体的电子特性来设计假定的 Ir-nitrenoids 的亲电性,从而促进 1,3-二羰基底物的烯醇 π 键的亲核加成。