Results 11 to 20 of about 139,650 (284)

Novel Amino-Pyridine Functionalized Chitosan Quaternary Ammonium Derivatives: Design, Synthesis, and Antioxidant Activity

Molecules, 2017
Chemical modification of chitosan is increasingly studied for its potential of providing new applications of chitosan. Here, a group of novel chitosan quaternary ammonium derivatives containing pyridine or amino-pyridine were designed and successfully ...
Qing Li, Caili Zhang, Wenqiang Tan, Guodong Gu, Zhanyong Guo   +4 more
doaj   +3 more sources

First Principle Analysis on Pyridine Amide Derivatives’ Adsorption Behavior on the Pt (111) Surface

Crystals, 2021
The reactivity and adsorption behavior of three pyridine amide additives (Nicotinamide, Pyridine-2-formamide and Pyridine-4-formamide) on the Pt (111) surface was studied by First principle methods.
Guocai Tian, Huanhuan Du, Hongmei Zhang
doaj   +1 more source

Fast microwave-assisted oxidation of 1,4-dihydropyridines with FeCl 3.SiO 2 [PDF]

, 2005
Pyridine derivatives are easily obtained in high yields by microwave-promoted rapid oxidation of the corresponding 1,4-dihydropyridines with ferric chloride hexahydrate and silica gel under solvent-free ...
Alaee, E., Halvagar, M.R., Hosseini, A., Khalilzadeh, M.A., Tajbakhsh, M.   +4 more
core   +1 more source

Synthesis and late-stage functionalization of complex molecules through C-H fluorination and nucleophilic aromatic substitution. [PDF]

, 2014
We report the late-stage functionalization of multisubstituted pyridines and diazines at the position α to nitrogen. By this process, a series of functional groups and substituents bound to the ring through nitrogen, oxygen, sulfur, or carbon are ...
Fier, Patrick S, Hartwig, John F
core   +3 more sources

A comparative study of the electrochemical properties of vitamin B-6 related compounds at physiological pH [PDF]

, 2011
A comparative study of vitamin B6 group and related compounds in buffered solutions using electrochemical techniques has been performed at neutral pH.
A. Pocker, A. Temizer, A.E. Braunstein, A.J. Bard, A.J. Román, A.K. Lunn, C.M. Harris, C.M. Metzler, D. Manousek, E.E. Snell, H. Lund, J. Gonzalez-Rodríguez, J. Llor, J. Llor, J. M. Sevilla, J.M. Rodríguez Mellado, J.M. RodrÍguez Mellado, J.M. RodrÍguez Mellado, J.M. RodrÍguez Mellado, L. Camacho, M. Blázquez, M. Blázquez, M. Heyrovský, M. Stanulovic, M.L. Ahrens, M.S. Ibrahim, N.P. Bazhulina, P. Zuman, P. Zuman, R. Izquierdo, R. Izquierdo, R. Schwartz, S.G. Mairanoskii, T. Pineda, T. Pineda, T. Pineda, V. Mirceski, W.F. Wolkers, Y.V. Morozov   +38 more
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Efficient Synthesis of Novel Pyridine-Based Derivatives via Suzuki Cross-Coupling Reaction of Commercially Available 5-Bromo-2-methylpyridin-3-amine: Quantum Mechanical Investigations and Biological Activities

Molecules, 2017
The present study describes palladium-catalyzed one pot Suzuki cross-coupling reaction to synthesize a series of novel pyridine derivatives 2a–2i, 4a–4i. In brief, Suzuki cross-coupling reaction of 5-bromo-2-methylpyridin-3-amine (1) directly or via N-[5-
Gulraiz Ahmad, Nasir Rasool, Hafiz Mansoor Ikram, Samreen Gul Khan, Tariq Mahmood, Khurshid Ayub, Muhammad Zubair, Eman Al-Zahrani, Usman Ali Rana, Muhammad Nadeem Akhtar, Noorjahan Banu Alitheen   +10 more
doaj   +1 more source

Chemical and photochemical properties of chloroharmine derivatives in aqueous solutions [PDF]

, 2016
Thermal and photochemical stability (ΦR), room temperature UV-vis absorption and fluorescence spectra, fluorescence quantum yields (ΦF) and lifetimes (τF), quantum yields of hydrogen peroxide (ΦH2O2) and singlet oxygen (ΦΔ) production, and triplet ...
Cabrerizo, Franco Martín, Denofrio, Maria Paula, Erra Balsells, Rosa, Gonzalez, Maria Micaela, Rasse Suriani, Federico Ariel Osvaldo, Seifermann, Marco, Wolcan, Ezequiel, Yañuk, Juan Gabriel   +7 more
core   +1 more source

Zirconium and titanium complexes supported by tridentate LX2 ligands having two phenolates linked to furan, thiophene, and pyridine donors: precatalysts for propylene polymerization and oligomerization [PDF]

, 2008
Zirconium and titanium complexes with tridentate bis(phenolate)-donor (donor = pyridine, furan and thiophene) ligands have been prepared and investigated for applications in propylene polymerization.
Agapie, Theodor, Bercaw, John E., DiPasquale, Antonio G., Henling, Lawrence M., Rheingold, Arnold L.   +4 more
core   +2 more sources

Medicinal attributes of pyridine scaffold as anticancer targeting agents

Future Journal of Pharmaceutical Sciences, 2021
Background The heterocyclic compounds particularly pyridine displayed clinical and biological implementation. Pyridine scaffolds have been detected in most relevant drug molecules that included pyridine provided a great possibility for treatment.
Esraa Ali Mohamed, Nasser S. M. Ismail, Mohamed Hagras, Hanan Refaat   +3 more
doaj   +1 more source

Efficient and Facile Synthesis of Chromenopyrano[2,3-b]pyridine Derivatives Catalyzed by Sodium Carbonate

Acta Chimica Slovenica, 2021
In this research, a number of new and known chromenopyrano[2,3-b]pyridine derivatives have been prepared. Initially, according to the reported procedure, pyrano[2,3-c]chromene derivatives were synthesized by the reaction between 4-hydroxycoumarin ...
Raziyeh Keshavarz, Mahnaz Farahi, Bahador Karami   +2 more
doaj   +1 more source