Results 21 to 30 of about 3,637 (213)

Synthesis and molecular modelling studies of pyrimidinones and pyrrolo[3,4-d]-pyrimidinodiones as new antiplasmodial compounds

Memorias do Instituto Oswaldo Cruz, 2018
BACKGROUND Malaria is responsible for 429,000 deaths per year worldwide, and more than 200 million cases were reported in 2015. Increasing parasite resistance has imposed restrictions to the currently available antimalarial drugs.
Kamilla Rodrigues Rogerio, Leonardo J M Carvalho, Luiza Helena Pinto Domingues, Bruno Junior Neves, José Teófilo Moreira Filho, Rosane Nora Castro, Cesare Bianco Júnior, Claudio Tadeu Daniel-Ribeiro, Carolina Horta Andrade, Cedric Stephan Graebin   +9 more
doaj   +1 more source

Five-Membered Heterocyclic Ring Via Dichalcones [PDF]

مجلة التربية والعلم, 2013
In this study some of dichalcone compounds (4-12) were prepared by the reaction of benzalacetone and its derivatives with a number of different ketones (acetophenone, acetanilide, 2-butanone).
N. Ahmad, O Ali
doaj   +1 more source

A One-pot Multi-component Synthesis of some New Dihydropyrimidine Derivatives via Biginelli Condensations

Zanco Journal of Pure and Applied Sciences, 2023
The Biginelli Reaction is a one-pot acid catalyzed cyclocondensation of -keto ester, urea and aromatic aldehyde which leads to the synthesis of functionalized 3,4-dihydro-2(H)-pyrimidinones (DHPMs).
Rostam R. Braiem
doaj   +1 more source

Repair, abort, ignore? Strategies for dealing with UV damage [PDF]

, 2011
DNA repair is a prominent member of the nuclear transactions triad (replication, transcription, and repair). Sophisticated mechanisms govern the cellular process of decision-making (to repair or not to repair, to proceed with cell cycle or not and ...
Khalil, Hilal S., Tummala, Hemanth, Zhelev, Nikolai   +2 more
core   +3 more sources

Synthesis of Pyrazolo[1,5-α]pyrimidinone Regioisomers [PDF]

The Journal of Organic Chemistry, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lori K, Gavrin, Arthur, Lee, Brian A, Provencher, Walter W, Massefski, Stephen D, Huhn, Gregory M, Ciszewski, Derek C, Cole, John C, McKew   +7 more
openaire   +2 more sources

Design, Synthesis and Anticancer Activity of New Polycyclic: Imidazole, Thiazine, Oxathiine, Pyrrolo-Quinoxaline and Thienotriazolopyrimidine Derivatives

Molecules, 2021
In this article, we showed the synthesis of new polycyclic aromatic compounds, such as thienotriazolopyrimidinones, N-(thienotriazolopyrimidine) acetamide, 2-mercapto-thienotriazolo-pyrimidinones, 2-(((thieno-triazolopyrimidine) methyl) thio) thieno ...
Ameen Ali Abu-Hashem, Sami A. Al-Hussain, Magdi E. A. Zaki   +2 more
doaj   +1 more source

Synthesis and Biological Evaluation of Thieno[3,2-d]- pyrimidinones, Thieno[3,2-d]pyrimidines and Quinazolinones: Conformationally Restricted 17b-Hydroxysteroid Dehydrogenase Type 2 (17b-HSD2) Inhibitors

Molecules, 2013
In this study, a series of conformationally restricted thieno[3,2-d]pyrimidinones, thieno[3,2-d]pyrimidines and quinazolinones was designed and synthesized with the goal of improving the biological activity as 17b-hydroxysteroid dehydrogenase type 2 ...
Rolf W. Hartmann, Enrico Perspicace, Sandrine Marchais-Oberwinkler   +2 more
doaj   +1 more source

Synthesis and Antimicrobial Activity of Some New Pyrimidinone and Oxazinone Derivatives Fused with Thiophene Rings Using 2-Chloro-6-ethoxy-4-acetylpyridine as Starting Material

Molecules, 2012
A series of pyridines, pyrimidinones, oxazinones and their derivatives were synthesized as antimicrobial agents using citrazinic acid (2,6-dihydroxyisonicotinic acid) as a starting material.
Abd El-Galil E. Amr, Aisha S. M. Hossan, Hanaa M. A. Abu-Melha, Mohamed A. Al-Omar   +3 more
doaj   +1 more source

Synthesis of pyrazolopyrimidinones using a “one-pot” approach under microwave irradiation

Beilstein Journal of Organic Chemistry, 2018
A simple one-pot method for the microwave-assisted synthesis of substituted pyrazolo[1,5-a]pyrimidinones, a core scaffold in many bioactive and pharmaceutically relevant compounds, has been established.
Mark Kelada, John M. D. Walsh, Robert W. Devine, Patrick McArdle, John C. Stephens   +4 more
doaj   +1 more source

Synthesis and Transformations of di-endo-3-Aminobicyclo-[2.2.2]oct-5-ene-2-carboxylic Acid Derivatives

Molecules, 2011
all-endo-3-amino-5-hydroxybicyclo[2.2.2]octane-2-carboxylic acid (13) and all-endo-5-amino-6-(hydroxymethyl)bicyclo[2.2.2]octan-2-ol (10) were prepared via dihydro-1,3-oxazine or g-lactone intermediates by the stereoselective functionalization of an N ...
Márta Palkó, Pál Sohár, Ferenc Fülöp   +2 more
doaj   +1 more source