Mostrando 1,341 - 1,360 Resultados de 4,819 Para Buscar 'Pirimidina~', tiempo de consulta: 5.63s Limitar resultados
  1. 1341
  2. 1342
  3. 1343
    “…In the crystal, mol­ecules are connected into a three-mol­ecule aggregate via amide–DABCO N—H⋯N hydrogen bonds, and these are connected into a three-dimensional architecture via amino–DABCO N—H⋯O and amino-pyrimidine N—H⋯N hydrogen bonds.…”
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  4. 1344
    “…A series of new 10-(alkylamino)-8-methyl-2, 6-dihydroimidazo[1, 2-c]pyrimido[5, 4-e]pyrimidine-5(3H)-thiones (4a-g) were subjected to molecular property prediction (drug-likeness, lipophilicity and solubility parameters) using Osiris Property Explorer, ALOGPS 2.1, Molinspiration and ACD/Chemsketch 12.0 software programmes. …”
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  5. 1345
  6. 1346
    “…In the title compound, C(12)H(14)N(2)O(2)S(2), the di­hydro­pyrimidine ring adopts a sofa conformation, with the C atom bearing the thienyl ring lying above the plane of the five remaining approximately coplanar (r.m.s. deviation = 0.0405 Å) atoms of the ring. …”
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  7. 1347
    “…In each mol­ecule, the pyrimidine ring adopts a sofa conformation with the sp (3)-hybridized C atom forming the flap and the fluoro-substituted ring in an axial position. …”
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  8. 1348
    por Bamoharram, Fatemeh Farrash
    Publicado 2010
    “…The synthesized compounds were characterized by IR, UV, and TGA and used for the catalytic synthesis of 4-aminopyrazolo[3,4,-d]pyrimidine derivatives 2a-2d. Our findings showed efficient catalytic activities for A and B.…”
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  9. 1349
    “…A series of novel 5-amino-7-aryl-7,8-dihydro-[1,2,4] triazolo[4,3-a]-pyrimidine-6-carbonitriles were synthesized by a one-pot reaction of 3-amino-1,2,4-triazole, malononitrile and aryl aldehydes in the presence of 20 mol% NaOH in ethanol under heating or ultrasonic irradiation. …”
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  10. 1350
    “…This work used quantum chemical method via DFT to calculate molecular descriptors for the development of QSAR model to predict bioactivity (IC(50)- 50% inhibition concentration) of the selected 1, 2, 3-triazole-pyrimidine derivatives against receptor (human gastric cancer cell line, MGC-803). …”
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  11. 1351
  12. 1352
    “…In search for new anti-Flu drugs, our group has focused on viral RNA-dependent RNA polymerase (RdRP) developing disruptors of PA-PB1 subunits interface with the best compounds characterized by cycloheptathiophene-3-carboxamide and 1,2,4-triazolo[1,5-a]pyrimidine-2-carboxamide scaffolds. By merging these moieties, two very interesting hybrid compounds were recently identified, starting from which, in this paper, a series of analogues were designed and synthesized. …”
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  13. 1353
    “…New compounds with a 7-amino-2-arylmethyl-thiazolo[5,4-d]pyrimidine structure were synthesized and evaluated in vitro for their affinity and/or potency at the human (h) A(1), hA(2A), hA(2B), and hA(3) adenosine receptors (ARs). …”
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  14. 1354
  15. 1355
    “…A new approach toward the construction of the thieno[2,3-d]pyrimidine core system was demonstrated by the reaction of the prepared dihydrothiophenes with HCHO and RNH(2) under noncatalyzed Mannich conditions.…”
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  16. 1356
    “…A series of pyrimidine conjugates containing a fragment of racemic 7,8-difluoro-3,4-dihydro-3-methyl-2H-[1,4]benzoxazine and its (S)-enantiomer attached via a 6-aminohexanoyl fragment were synthesized by the reaction of nucleophilic substitution of chlorine in various chloropyrimidines. …”
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  17. 1357
    por Bosch, Eric, Bowling, Nathan P.
    Publicado 2022
    “…In the extended structure, two unique C—I⋯N halogen bonds from one of the 1,2,3,5-tetra­fluoro-4,6-di­iodo­benzene mol­ecules to the pyrimidine N atoms of the 5-{[4-(di­methyl­amino)­phen­yl]ethyn­yl}pyrimidine mol­ecule generate [110] chains and layers of these chains are π-stacked along the a-axis direction. …”
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  18. 1358
  19. 1359
    “…In the current work, we designed and synthesized three families of non-fused and fused compounds based on cyanopyridone: derivatives of 6-amino-1,2-dihydropyridine-3,5-dicarbonitrile (5a-f) and 3,4,7,8-tetrahydro pyrimidine-6-carbonitrile (6a-b and 7a-e). The newly synthesized compounds’ structure were determined using a variety of techniques, including (1)H NMR, (13)C NMR, mass spectrum, infrared spectroscopy, and elemental analysis. …”
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  20. 1360
    “…In the present investigation, derivatives from (2–6) containing pyrimidine-2-thione moiety incorporated with different heterocycles such as pyrazoline, phenyl pyrazoline, and pyrimidine were synthesized using different methods. …”
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