Enantioselective α-Amination of Acyclic 1,3-Dicarbonyls Catalyzed by N-Heterocyclic Carbene
作者:Surojit Santra、Ujjwal Maji、Joyram Guin
DOI:10.1021/acs.orglett.9b04232
日期:2020.1.17
Herein, we describe a method for the catalytic enantioselective α-amination of α-substituted acyclic 1,3-ketoamides and 1,3-amidoesters that affords the products possessing N-substituted quaternary stereocenters with a chiral N-heterocyclic carbene (NHC). The reaction is based on the utilization of an intrinsic Brønsted base characteristic of NHC that enables the catalytic formation of a chiral ion
在这里,我们描述了一种用于α-取代的无环1,3-酮酰胺和1,3-酰胺基酯的催化对映选择性α-氨基化的方法,该方法提供了具有N-取代的季立体中心和手性N-杂环卡宾(NHC)的产物。该反应基于利用NHC的固有布朗斯台德碱特性,该特性使能催化形成包含烯醇盐和the离子的手性离子对。通过该方法将一系列具有挑战性的开链α-取代的1,3-二羰基胺化,其ee≤99%。