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
Transition metal-free [3 + 3] annulation of cyclopropanols with β-enamine esters to assemble nicotinate derivatives
作者:Jun-Long Zhan、Lin Zhu、Jia-Nan Bai、Jian-Bo Liu、Shi-Han Zhang、Yao-Qiang Xie、Bo-Mei Hu、Yang Wang、Wen-Jun Han
DOI:10.1039/d3ob01662e
日期:——
An atom-economical synthetic approach for preparing structurally important nicotinates under metal- and additive-free conditions was developed.
开发了一种原子经济合成方法,可在无金属和添加剂条件下制备结构重要的烟酸盐。
Transition-Metal-Free Synthesis of Substituted Pyridines via Ring Expansion of 2-Allyl-2<i>H-</i>azirines
作者:Yaojia Jiang、Cheol-Min Park、Teck-Peng Loh
DOI:10.1021/ol501010k
日期:2014.7.3
good to excellent yields is reported. The reaction displays a broad substrate scope and good tolerance to a variety of substituents including aryl, alkyl, and heterocyclic groups. In addition, one-pot synthesis of pyridines from oximes via in situ formation of 2H-azirines was achieved.