Synthesis of Functionalized Pyridines via Cu(II)-Catalyzed One-Pot Cascade Reactions of Inactivated Saturated Ketones with Electron-Deficient Enamines
作者:Guang Chen、Ze Wang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.7b01901
日期:2017.10.20
In this paper, a novel and efficient synthesis of 3-acylpyridines and pyridine-3-carboxylates through the oxidative one-pot sequential reactions of inactivated saturated ketones with electron-deficient enamines is presented. Mechanistically, the formation of the title compounds involves the in situ formation of an enone intermediate through an oxidative dehydrogenation of the saturated ketone substrate
在本文中,提出了一种新的有效的合成方法,该方法通过灭活的饱和酮与缺电子的烯胺的氧化一锅顺序反应来合成3-酰基吡啶和-3-羧酸吡啶酯。从机理上讲,标题化合物的形成涉及通过饱和酮底物的氧化脱氢原位形成烯酮中间体,然后通过级联过程用β-烯胺酮或β-烯胺酸酯将其[3 + 3]环合,包括迈克尔加成,醛醇缩合和氧化芳构化。