Carbene-Catalyzed Tandem Imine Umpolung–Intramolecular Aza-Conjugate Addition–Oxidation to Access <i>N</i>-Substituted Isoindolinones
作者:Jakkula Ramarao、Purna Chandra Behera、Manyam Subbi Reddy、Surisetti Suresh
DOI:10.1021/acs.joc.3c02187
日期:2024.1.5
proceeds through NHC-catalyzed tandem imine umpolung–intramolecular aza-Michael addition followed by oxidation, while molecular oxygen in air acts as a sole oxidant. Atom efficiency, operational simplicity, large-scale syntheses, and mild reaction conditions are the salient features of this method. Mechanistic studies were indicative of the necessity of molecular oxygen in air as oxidant for the conversion
在此,我们描述了一种新型的 N-杂环卡宾 (NHC) 催化合成N-取代异吲哚酮乙酸酯。所提出的转化通过 NHC 催化的串联亚胺 umpolung-分子内氮杂迈克尔加成进行,然后进行氧化,而空气中的分子氧充当唯一的氧化剂。原子效率、操作简单、大规模合成和反应条件温和是该方法的显着特点。机理研究表明空气中的分子氧作为亚胺转化为酰胺的氧化剂的必要性。