Microwave-assisted regioselective one-pot synthesis of trisubstituted pyridine scaffolds using K<sub>5</sub>CoW<sub>12</sub>O<sub>40</sub>.3H<sub>2</sub>O under solvent free conditions
作者:Srinivas Kantevari、Mahankhali Venu Chary、Srinivasu V. N. Vuppalapati、N. Lingaiah
DOI:10.1002/jhet.5570450424
日期:2008.7
A highly efficient, microwave-assisted, regioselectivesynthesis of 2,3-disubstituted-6-arylpyridines and new series of 7,7-dimethyl-2-aryl-5,6,7,8-tetrahydroquinoline-5-ones from enaminones in the presence of K5CoW12O40.3H2O (1.0 mol %) as heterogeneous catalyst undersolventfreeconditions is reported.
高效的微波辅助区域选择性合成的2,3-二取代的6-芳基吡啶和新的7,7-二甲基2-芳基5,6,7,8-四氢喹啉5-酮从氨基酮中合成。据报道在无溶剂条件下存在K 5 CoW 12 O 40 .3H 2 O(1.0 mol%)作为非均相催化剂。
Enaminones as Building Blocks In Heterocyclic Synthesis: A New One Pot Synthesis of Polyfunctional Substituted Pyridines
作者:Samia Michel Agamy、Mervat Mohammed Abdel-Khalik、Mona Hassan Mohamed、Mohammed Hilmy Elnagdi
DOI:10.1515/znb-2001-1016
日期:2001.10.1
Enaminones react with a variety of active methyl and methylene reagents in presence of ammonium acetate to yield functionally substituted pyridines in good yields. The reaction proceeded via initial Michael addition across the double bond followed by cyclization. The reaction of enaminone with aromatic aldehyde in acetic acid/ammonium acetate afforded the dihydropyridine that was oxidized to the corresponding
Enaminones in heterocyclic synthesis: Synthesis and chemical reactivity of 3-anilino-1-substituted-2-propene-1- one
作者:Balkis Al-Saleh、Morsy Ahmed El-Apasery、Rasha Safwat Abdel-Aziz、Mohamed Hilmy Elnagdi
DOI:10.1002/jhet.5570420414
日期:2005.5
The 3-anilinoenones 3a,b were prepared from the corresponding 3-dimemyl-aminopropenones. The reactivity of 3a,b towards a variety of carbon and nitrogen nucleophiles as well as naphthoquinones is reported.
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