نتایج جستجو برای: 3 dicarbonyl compounds

تعداد نتایج: 1987990  

Journal: :Organic & biomolecular chemistry 2013
Chen Zhang Dao-Min Zhuang Jia Li Si-Yuan Chen Xiao-Long Du Jian-Yong Wang Jing-Yun Li Biao Jiang Jian-Hua Yao

Diverse reactivity by coupling of substituted anilines with ethyl trifluoropyruvate was developed under microwave irradiation without catalysts to generate 3-trifluoromethyl-3-hydroxy oxindoles, aromatic hydroxy trifluoromethyl esters, and 1,2-dicarbonyl compounds in a fast and efficient manner. The plausible mechanism for obtaining different products was proposed. Furthermore, the anti-HIV act...

Fe (III) supported graphitic carbon nitride nanocomposite was synthesized by impregnation of FeCl3 with g- C3N4 (Fe (III)@g-C3N4). Then, the synthesis of spirooxindole derivatives was carried out in the presence of Fe (III) @ graphitic carbon nitride nanocompositevia the multi-component reaction of malononitrile, isatins, and 1,3...

In the present study, the synthesis of diethylene triamine supported on cellulose biopolymer as a biodegradable solid basic heterogeneous catalyst was suggested. Then, the applicability of the synthesized catalyst cellulose bonded N-propyl diethylene triamine (CBPDETA) was tested for the synthesis of oxindole derivatives, an important class of potentially bioactive compounds. A various series o...

Journal: :Molecules 2016
Georgiy B Shul'pin Dmitriy A Loginov Lidia S Shul'pina Nikolay S Ikonnikov Vladislav O Idrisov Mikhail M Vinogradov Sergey N Osipov Yulia V Nelyubina Polina M Tyubaeva

Cobalt pi-complexes, previously described in the literature and specially synthesized and characterized in this work, were used as catalysts in homogeneous oxidation of organic compounds with peroxides. These complexes contain pi-butadienyl and pi-cyclopentadienyl ligands: [(tetramethylcyclobutadiene)(benzene)cobalt] hexafluorophosphate, [(C₄Me₄)Co(C₆H₆)]PF₆ (1); diiodo(carbonyl)(pentamethylcyc...

Journal: :Reviews of environmental contamination and toxicology 2010
Peter Kovacic Andrew L Cooksy

Diacetyl, a butter-flavoring component, has recently attracted scientific and media attention because it has been implicated as an agent that induces popcorn lung disease in exposed plant workers. This disease, officially referred to as bronchiolitis obliterans, entails exposure-induced compromise to the lung's epithelial barrier function. In this review, we present a novel molecular mechanism ...

Journal: :Advanced Synthesis & Catalysis 2023

The inside cover picture illustrates the introduction of a catalyst-free three-component coupling reaction for synthesis 1,4-dicarbonyl compounds. This innovative process employs light-activated electron donor-acceptor complexes to initiate single-electron reduction via carboxylic acid derivatives, triphenylphosphine, and sodium iodide. Subsequently, decarboxylation fragmentation gives rise nuc...

Journal: :The Journal of biological chemistry 2002
Klaus M Biemel D Alexander Friedl Markus O Lederer

Glycation reactions leading to protein modifications (advanced glycation end products) contribute to various pathologies associated with the general aging process and long term complications of diabetes. However, only few relevant compounds have so far been detected in vivo. We now report on the first unequivocal identification of the lysine-arginine cross-links glucosepane 5, DOGDIC 6, MODIC 7...

In this work, the efficiency, generality and applicability of new Bronsted acidic ionic liquid (BAIL) 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride {[Msei]Cl} as heterogeneous and green catalyst for organic transformations are studied. Herein, the following one-pot multi-component reactions in the presence of [Msei]Cl are investigated: (i) the synthesis of quinoxaline derivatives fr...

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