Multicomponent Tether Catalysis Synthesis of Highly Functionalized 4-(Pyridin-2-ylmethyl)-2-aminopyrroles via Cascade Reaction Is Accompanied by Decarboxylation
作者:Kun Li、Li Chen、Yun-Xiang Fan、Yao Wei、Sheng-Jiao Yan
DOI:10.1021/acs.joc.9b01814
日期:2019.9.20
catalysis protocol for the synthesis of 4-(pyridin-2-ylmethyl)-2-aminopyrroles (PMAPs) was constructed by simply refluxing a mixture of ethyl 2-(pyridin-2-yl)acetates 1 and various types of arylglyoxal monohydrates 2 and different heterocyclic ketene aminals 3 in EtOH solvent. Based on this reaction, a series of highly functionalized PMAPs were obtained through a novel cascade reaction accompanied by a decarboxylation
通过简单地回流2-(吡啶-2-基)乙酸乙酯乙基1和各种类型的芳基乙二醛的混合物,构建了用于合成4-(吡啶-2-基甲基)-2-氨基吡咯(PMAP)的多组分束缚催化方案。一水合物2和不同的杂环烯酮缩醛3在EtOH溶剂中。基于该反应,通过伴随脱羧机理的新型级联反应获得了一系列高度官能化的PMAP。结果,将吡啶-2-基甲基成功地引入了目标化合物中,并且使用本研究中描述的级联反应可以轻松构建PMAPs库。该方案表明,最重要的特征是2-(吡啶-2-基)乙酸酯的脱羧反应1,它可以在吡啶-2-基甲基-取代的杂环,包括吡咯类,吡啶类,喹诺酮类,以及类似于那些在自然界中发现的其它杂环化合物的合成中使用。