Results 1 to 10 of about 104,064 (339)

Oxidative Aromatization of Some 1,4-Dihydropyridine Derivatives Using Pyritic Ash in Eco-Sustainable Conditions

Chemistry Proceedings, 2023
Hantzsch 1,4-dihydropyridines (Hantzsch 1,4-DHP), have been utilized as starting material in organic synthesis. In addition, several 1,4-DHP based drugs (Nifedipine, Niguldipine, Amlodepine besylate) have been recognized for the treatment of ...
Juan Enrique Tacoronte Morales, Carla Bernal Villavicencio, Xavier Leopoldo Gracia Cervantes, Maria Elizabeth Canchingre, Maria Teresa Cabrera Pedroso   +4 more
doaj   +1 more source

Reaction of Group III Biheterocyclic Complexes [PDF]

, 2009
Group III alkyl complexes supported by a ferrocene diamide ligand (1,1′-fc(NSitBuMe_2)_2) have been found to be reactive toward aromatic N-heterocycles such as 1-methylimidazole and pyridines.
Benitez, Diego, Carver, Colin T., Diaconescu, Paula L., Goddard, William A., III, Miller, Kevin L., Tkatchouk, Ekaterina, Williams, Bryan N.   +6 more
core   +1 more source

Degradation of lansoprazole and omeprazole in the aquatic environment [PDF]

, 2006
Lansoprazole and omeprazole degrade in water leading to sulfides, benzimidazolones and a red complex material. Degradation is accelerated in acid medium and by solar simulator irradiation.
BRIGANTE M., DELLA GRECA, MARINA, IESCE, MARIA ROSARIA, PREVITERA, LUCIO, RUBINO, MARIA, TEMUSSI, FABIO   +5 more
core   +1 more source

Platinum(II) complexes based on derivatives of natural chlorins with pyridine-containing chelate groups as prototypes of drugs for combination therapy in oncology

Тонкие химические технологии
Objectives. To synthesize Pt-containing derivatives of natural chlorins as potential agents for the combination therapy in oncology. Platinum compounds are known to occupy an important place as chemotherapeutic agents in the treatment of oncological ...
N. S. Kirin, P. V. Ostroverkhov, M. N. Usachev, K. P. Birin, M. A. Grin   +4 more
doaj   +1 more source

In vitro assessment of antimicrobial, antioxidant, and cytotoxic properties of Saccharin-Tetrazolyl and-Thiadiazolyl derivatives: the simple dependence of the pH value on antimicrobial activity [PDF]

, 2019
The antimicrobial, antioxidant, and cytotoxic activities of a series of saccharin-tetrazolyl and -thiadiazolyl analogs were examined. The assessment of the antimicrobial properties of the referred-to molecules was completed through an evaluation of ...
Andrade, Joana M., Cabral, Lília, Cristiano, Maria de Lurdes, Frija, Luís M. T., Ntungwe, Epole, Pombeiro, Armando J. L., Rijo, Patrícia, Sitarek, Przemysław, Toma, Monika, Śliwiński, Tomasz   +9 more
core   +1 more source

Pyrazolopyridines and Pyrazolopyrimidines as Functional Dipolar Scaffolds: An Approach Regarding Synthesis and Photophysics

Chemistry
Pyrazolopyridines and pyrazolopyrimidines are 5:6 aza-fused N-heteroaromatic compounds (NHACs) comprising a pyrazole ring fused to a pyridine or pyrimidine ring.
Silvia Cruz, Jaime Portilla
doaj   +1 more source

Synthesis of alkylidene pyrrolo[3,4-b]pyridin-7-one derivatives via RhIII-catalyzed cascade oxidative alkenylation/annulation of picolinamides [PDF]

, 2014
A practical RhIII-catalyzed cascade olefination/annulation of picolinamides leading to pyrrolo[3,4-b]pyridines has been developed. The reaction shows wide scope, complete regiocontrol and excellent stereoselectivityWe thank Spanish Government (MINECO ...
Carretero, Juan C., Gómez Arrayás, Ramón, Martínez, Ángel Manu, Rodríguez, Nuria   +3 more
core   +2 more sources

The Flögel-three-component reaction with dicarboxylic acids – an approach to bis(β-alkoxy-β-ketoenamides) for the synthesis of complex pyridine and pyrimidine derivatives

Beilstein Journal of Organic Chemistry, 2014
An extension of the substrate scope of the Flögel-three-component reaction of lithiated alkoxyallenes, nitriles and carboxylic acids is presented. The use of dicarboxylic acids allowed the preparation of symmetrical bis(β-ketoenamides) from simple ...
Mrinal K. Bera, Moisés Domínguez, Paul Hommes, Hans-Ulrich Reissig   +3 more
doaj   +1 more source

A Novel Synthesis of Highly Functionalized Pyridines by a One-Pot, Three-Component Tandem Reaction of Aldehydes, Malononitrile and N-Alkyl-2-cyanoacetamides under Microwave Irradiation

Molecules, 2018
A convenient, fast and environmentally benign procedure for the synthesis of a new series of highly functionalized N-alkylated pyridines as privileged medicinal scaffolds was developed via a unique three-component reaction of easily available aromatic as
Ramadan Ahmed Mekheimer, Mariam Abdullah Al-Sheikh, Hanadi Yousef Medrasi, Najla Hosain Hassan Alsofyani   +3 more
doaj   +1 more source

Structural panels [PDF]

, 1987
Vinyl pyridines including vinyl stilbazole materials and vinyl styrylpyridine oligomer materials are disclosed. These vinylpyridines form copolymers with bismaleimides which copolymers have good fire retardancy and decreased brittleness.
Chen, Timothy S., Heimbuch, Alvin H., Hsu, Ming-Ta S., Parker, John A.   +3 more
core   +1 more source