Results 31 to 40 of about 68,807 (327)

Design and Synthesis of New Pyrimidine-Quinolone Hybrids as Novel hLDHA Inhibitors

open access: yesPharmaceuticals, 2022
A battery of novel pyrimidine-quinolone hybrids was designed by docking scaffold replacement as lactate dehydrogenase A (hLDHA) inhibitors. Structures with different linkers between the pyrimidine and quinolone scaffolds (10-21 and 24–31) were studied in
Iván Díaz   +3 more
doaj   +1 more source

Dipole oscillator strength distributions, sum rules, mean excitation energies, and isotropic van der Waals coefficients for benzene, pyridazine, pyrimidine, pyrazine, s-triazine, toluene, hexafluorobenzene, and nitrobenzene [PDF]

open access: yesJ. Chem. Phys. 153, 124307 (2020), 2020
Experimental, theoretical, and additive-model photoabsorption cross-sections combined with constraints provided by the Kuhn-Reiche-Thomas sum rule and the high-energy behavior of the dipole-oscillator-strength density are used to construct dipole oscillator strength distributions for benzene, pyridazine (1,2-diazine), pyrimidine (1,3-diazine), pyrazine
arxiv   +1 more source

Synthesis of New Pyrazole and Pyrimidine Steroidal Derivatives

open access: yesMolecules, 2003
The synthesis of steroidal heterocycles containing the pyrazole and pyrimidine ring fused to the 16,17-position of the steroid nucleus is reported. Androstenolone acetate (1) reacted with carbon disulfide, iodomethane and sodium hydride to furnish 3β ...
Francisco Coll   +5 more
doaj   +1 more source

S=1/2 antiferromagnetic Heisenberg chain with staggered fields: Copper pyrimidine and copper benzoate using the density matrix renormalization group for transfer matrices [PDF]

open access: yesPhys. Rev. B 73, 220403(R) (2006), 2006
We consider the spin-1/2 antiferromagnetic Heisenberg chain in a staggered magnetic field describing materials such as copper benzoate and copper pyrimidine dinitrate. Using the density-matrix renormalization group for transfer matrices (TMRG) we calculate the magnetization of these materials at finite temperature and arbitrary magnetic field.
arxiv   +1 more source

Hydrogen Drives Part of the Reverse Krebs Cycle under Metal or Meteorite Catalysis

open access: yesAngewandte Chemie International Edition, Volume 61, Issue 51, December 19, 2022., 2022
Hydrogen is a geological reducing agent that powers the metabolisms of modern organisms and potentially also powered the metabolism of the last universal common ancestor to all extant life. It is shown that catalytic amounts of transition metals or small amounts of powdered meteorites allow hydrogen to drive a key sequence of the reverse Krebs cycle ...
Sophia A. Rauscher, Joseph Moran
wiley   +1 more source

The LANCA three-component reaction to highly substituted β-ketoenamides – versatile intermediates for the synthesis of functionalized pyridine, pyrimidine, oxazole and quinoxaline derivatives

open access: yesBeilstein Journal of Organic Chemistry, 2019
The LANCA three-component reaction of lithiated alkoxyallenes LA, nitriles N and carboxylic acids CA leads to β-ketoenamides KE in good to excellent yields.
Tilman Lechel   +4 more
doaj   +1 more source

Carbazole- and Triphenylamine-Substituted Pyrimidines: Synthesis and Photophysical Properties

open access: yesMolecules, 2019
A series of pyrimidine derivatives bearing one, two or three triphenylamine/9-ethylcarbazole substituents has been synthesized by Suzuki cross-coupling reaction. All compounds showed absorption bands in the UV region and the emission of violet-blue light
Sylvain Achelle   +4 more
doaj   +1 more source

Microwave assisted synthesis and antimicrobial activity of some novel pyrimidine derivatives [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
The synthesis of thiazolo [5,4-d]pyrimidines can be achieved from different 5-thiazolidinones, 2-butyl-1H-imidazole-5-carbaldehyde and thiourea using microwave irradiation within 5 min.
S. J. VAGHASIA, V. H. SHAH
doaj   +3 more sources

Crystal structure of 5-[bis(methylsulfonyl)methyl]-1,3-dimethyl-5-(methylsulfonyl)pyrimidine-2,4,6(1H,3H,5H)-trione

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C10H16N2O9S3, the pyrimidine ring of the 1,3-dimethyl barbituric acid moiety has an envelope conformation with the C atom carrying the methylsulfonyl and bis(methylsulfonyl)methyl substituents as the flap.
Eyad Mallah   +4 more
doaj   +1 more source

Design, Synthesis, and Biological Evaluation of PKD Inhibitors

open access: yesPharmaceutics, 2011
Protein kinase D (PKD) belongs to a family of serine/threonine kinases that play an important role in basic cellular processes and are implicated in the pathogenesis of several diseases.
Marie-Céline Frantz   +9 more
doaj   +1 more source

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