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Mostrando 121 - 140 Resultados de 4,819 Para Buscar 'Pirimidina~', tiempo de consulta: 5.12s Limitar resultados
  1. 121
    “…Inhibition of DNA repair enzymes tyrosyl-DNA phosphodiesterase 1 and poly(ADP-ribose)polymerases 1 and 2 in the presence of pyrimidine nucleoside derivatives was studied here. …”
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    Inhibition of Tyrosyl-DNA Phosphodiesterase 1 by Lipophilic Pyrimidine Nucleosides
  2. 122
    “…For example, phages carry in their genomes modified pyrimidines such as 5-hydroxymethyl-cytosine (5hmC) in T4gt deficient in α- and β-glycosyltransferases, glucosylated-5-hydroxymethylcytosine (5gmC) in T4, 5-methylcytosine (5mC) in Xp12, and 5-hydroxymethyldeoxyuridine (5hmdU) in SP8. …”
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    In vitro Type II Restriction of Bacteriophage DNA With Modified Pyrimidines
  3. 123
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    Development of High‐Performance Pyrimidine Nucleoside and Oligonucleotide Diarylethene Photoswitches
  4. 124
    “…In this study, 17 novel pyrimidine derivatives containing an amide moiety were synthesized. …”
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    Synthesis and Antifungal Activity of Pyrimidine Derivatives Containing an Amide Moiety
  5. 125
    “…The pyrimidine scaffold is present in many bioactive drugs; therefore, efficient synthetic routes that provide shorter reaction times, higher yields, and site-selective reactions are constantly being sought. …”
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    Ultrasound-assisted synthesis of pyrimidines and their fused derivatives: A review
  6. 126
    “…These observations demonstrate that the cardiac muscle cell regulates pyrimidine metabolism in nonmuscle cells by releasing adenine and specific nucleosides after heart injury and provide insight into how intercellular regulation of pyrimidine biosynthesis can be targeted and monitored for augmenting tissue repair.…”
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    Cardiomyocytes disrupt pyrimidine biosynthesis in nonmyocytes to regulate heart repair
  7. 127
    “…Here, the synthesis of new compounds in which a hydroxamic acid residue is attached to differently substituted pyrimidine rings via a methylene group bridge of varying length as potential HDAC inhibitors is described. …”
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    Synthesis and HDAC inhibitory activity of pyrimidine-based hydroxamic acids
  8. 128
    “…[Image: see text] An efficient two-step procedure for the syntheses of pyrimidine nucleosides is presented. A series of glycosyl 5-(aminomethylene)-1,3-dioxane-4,6-dione derivatives were prepared from β-anomeric isonitriles by reaction with Meldrum’s acid or by allowing aminomethylene Meldrum’s acid to react with an 1-aldofuranosyl halide or acetate. …”
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    Pyrimidine Nucleosides Syntheses by Late-Stage Base Heterocyclization Reactions
  9. 129
    por Yang, Hua
    Publicado 2009
    “…Colourless crystals of the title compound, [Ag(C(5)H(7)N(3))(C(6)H(9)N(3))]NO(3), separated out of a solution of 2-amino-4-methyl­pyrimidine, 2-amino-4,6-dimethyl­pyrimidine and silver nitrate in water and methanol. …”
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    (2-Amino-4,6-dimethyl­pyrimidine-κN (1))(2-amino-4-methyl­pyrimidine-κN (1))silver(I) nitrate
  10. 130
    por Yang, Hua
    Publicado 2009
    “…Colourless crystals of the title mixed ligand complex, [Ag(C(5)H(7)N(3))(C(6)H(9)N(3))]ClO(4), were obtained from a solution of 2-amino-4-methyl­pyrimidine, 2-amino-4,6-dimethyl­pyrim­idine and silver perchlorate in water and methanol. …”
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    (2-Amino-4,6-dimethyl­pyrimidine-κN (1))(2-amino-4-methyl­pyrimidine-κN (1))silver(I) perchlorate
  11. 131
    “…The title compounds, 2-(4-methylphenyl)-1H-perimidine hemihydrate (1, C(18)H(14)N(2)·0.5H(2)O) and 1-methyl-2-(4-methylphenyl)-1H-perimidine (2, C(19)H(16)N(2)), were prepared and characterized by (1)H NMR and single-crystal X-ray diffraction. …”
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    Syntheses and crystal structures of 2-(p-tol­yl)-1H-perimidine hemihydrate and 1-methyl-2-(p-tol­yl)-1H-perimidine
  12. 132
    por Dave, Chaitanya G., Shah, Rina D.
    Publicado 2002
    “…Syntheses of several novel 4-chloropyrrolo[2,3-d]pyrimidines (1), 4- hydrazinopyrrolo[2,3-d]pyrimidines (2) and 3-amino-4-iminopyrrolo[2,3-d]pyrimidines (7) and their use in the synthesis of tetrazolo[1,5-c]pyrrolo[3,2-e]pyrimidines (3) and triazolo[1,5-c]pyrrolo[3,2-e]pyrimidines (4) required for biological screening are reported.…”
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    Annellation of Triazole and Tetrazole Systems onto Pyrrolo[2,3-d]pyrimidines: Synthesis of Tetrazolo[1,5-c]-pyrrolo[3,2-e]-pyrimidines and Triazolo[1,5-c]pyrrolo-[3,2-e]pyrimidines as Potential Antibacterial Agents
  13. 133
    por Peng, Rong, Ng, Seik Weng
    Publicado 2012
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    catena-Poly[[[2-({6-[(pyrimidin-2-ylsulfanyl-κS)meth­yl]pyridin-2-yl-κN}methyl­sulfan­yl)pyrimidine]­copper(I)]-μ-thio­cyanato-κ(2) N:S]
  14. 134
    “…In the crystal structure of the title compound, [Fe(3)(NCS)(6)(C(4)H(4)N(2))(8)](n), each iron(II) cation is coordinated by four N-bonded pyrimidine ligands and two N-bonded thio­cyanate anions in a distorted octa­hedral environment. …”
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    catena-Poly[bis­[cis-dipyrimidine-trans-dithio­cyanato­iron(II)]-di-μ-pyrimidine-[trans-dithio­cyanato­iron(II)]-di-μ-pyrimidine]
  15. 135
    “…Compound 5 reacts with acetophenone and 2-acetylthiophene to give the 2-thioxo-1,3-dihydropyridino[2,3-d]pyrimidin-4-ones 3a and 3b, respectively. Compounds 3a,b react with hydrazonoyl halides 6,7 to give pyridino[2,3-d]triazolo[4,5-a]pyrimidin-4-ones 11a-d and not the isomeric structures 12a-d. …”
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    New Routes to Pyridino[2,3-d]pyrimidin-4-one and Pyridino-[2,3-d]triazolino[4,5-a]pyrimidin-5-one Derivatives
  16. 136
    “…Then, [(VO)TPP][(TCM)(4)] was used as a benign and expedient catalyst for the synthesis of numerous heterocyclic compounds such as 5-amino-7-(aryl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carbonitriles, 5-amino-7-(aryl)-[1,2,4]triazolo[1,5-a]pyrimidine-6-carbonitriles, 7-(aryl)-7,12-dihydro-5H-isochromeno[4,3-d][1,2,4]triazolo[1,5-a]pyrimidin-5-ones, and 4-(aryl)-2-(1H-indol-3-yl)-5,6,7,8-tetrahydroquinoline-3-carbonitriles under solvent-free conditions at 100 °C via a cooperative geminal-vinylogous anomeric based oxidation.…”
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    Synthesis of pyrimidine-6-carbonitriles, pyrimidin-5-ones, and tetrahydroquinoline-3-carbonitriles by new superb oxovanadium(V)-[5,10,15,20-tetrakis(pyridinium)-porphyrinato]-tetra(tricyanomethanide) catalyst via anomeric based oxidation
  17. 137
    “…Earlier studies aimed at investigating the metabolism of endogenous nucleoside triphosphates in synchronous cultures of E. coli cells revealed an auto-oscillatory mode of functioning of the pyrimidine and purine nucleotide biosynthesis system, which the authors associated with the dynamics of cell division. …”
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    Impact of Negative Feedbacks on De Novo Pyrimidines Biosynthesis in Escherichia coli
  18. 138
    “…The de novo pyrimidine biosynthesis pathway is an important route due to the relevance of its products, its implications in health and its conservation among organisms. …”
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    Regulation of the pyrimidine biosynthetic pathway by lysine acetylation of E. coli OPRTase
  19. 139
    “…A series of 4-(3,4-dichloroisothiazol-5-yl)-7-(2-((5-(5-pyrimidin-4-yl)amino)ethoxy)-8-methyl) coumarin derivatives were designed and synthesized by Williamson ether condensation and substitution reactions. …”
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    Design and Synthesis of Pyrimidine Amine Containing Isothiazole Coumarins for Fungal Control
  20. 140
    por Boss, J. M.
    Publicado 1968
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    The provocation of mitosis by 6-styryl-2,4,5-triamino-pyrimidine.
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