Visible-Light-Mediated Amination of π-Nucleophiles with <i>N</i>-Aminopyridinium Salts
作者:Katarzyna Goliszewska、Katarzyna Rybicka-Jasińska、Jakub Szurmak、Dorota Gryko
DOI:10.1021/acs.joc.9b02073
日期:2019.12.20
N-Aminopyridinium salts generate nitrogen-centered radicals by means of photoredox catalysis. Herein, we report that they can be trapped by enol equivalents to give α-amino carbonyl compounds in excellent yields. The broad synthetic utility of this method is demonstrated by functionalization of ketones, aldehydes, esters enol equivalents, vinyl ethers, and 1,3-diketones without the need for prior conversion
N-氨基吡啶鎓盐通过光氧化还原催化产生以氮为中心的自由基。在本文中,我们报道它们可以被烯醇当量捕获,从而以优异的产率得到α-氨基羰基化合物。该方法的广泛合成用途是通过将酮,醛,酯,烯醇等价物,乙烯基醚和1,3-二酮官能化而无需事先转化为烯醇衍生物而得到证明的。所开发的方法易于扩展,提供了广泛的底物范围和高化学选择性。