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.
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