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Mostrando 801 - 820 Resultados de 4,819 Para Buscar 'Pirimidina~', tiempo de consulta: 5.38s Limitar resultados
  1. 801
    por Morgan, Herbert R.
    Publicado 1952
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    FACTORS RELATED TO THE GROWTH OF PSITTACOSIS VIRUS (STRAIN 6BC) : II. PURINES, PYRIMIDINES, AND OTHER COMPONENTS RELATED TO NUCLEIC ACID
  2. 802
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    Crystal structure and substrate specificity of plant adenylate isopentenyltransferase from Humulus lupulus: distinctive binding affinity for purine and pyrimidine nucleotides
  3. 803
    por Xu, Shengzhen
    Publicado 2007
    “…Adjacent thienophene–pyrimidine and pyrimidine–benzene rings have centroid–centroid distances of 3.96 (1) and 3.55 (2) Å, respectively.…”
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    3-Butyl-2-propyl­amino-1-benzo­thieno[3,2-d]pyrimidin-4(3H)-one
  4. 804
    “…In the title compound, C(21)H(20)N(4)O(2), a potential anti-human immunodeficiency virus type 1 (HIV-1) non-nucleoside reverse transcriptase inhibitor, the pyrrolidine ring adopts an envelope conformation, while the hydrogenated pyrimidine ring adopts a weakly expressed twist conformation. …”
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    1-Benzyl-6-phenyl­imino-5-(pyrrol-2-yl­idene)hexa­hydro­pyrimidine-2,4-dione
  5. 805
    “…The angle at the methyl­ene C atom linking the pyrimidine and cyclo­hexane ring is 113.7 (3)°, which is in the range considered optimal for maximum activity of non-nucleoside reverse transcriptase inhibitors. …”
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    6-Cyclo­hexyl­methyl-2-cyclo­hexyl­sul­fanyl-5-isopropyl­pyrimidin-4(3H)-one
  6. 806
    “…The asymmetric unit of the title compound, C(15)H(15)ClN(4)O(6)S, contains two independent mol­ecules, in which the pyrimidine and benzene rings are oriented at dihedral angles of 75.21 (3) and 86.00 (3)°. …”
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    Ethyl 2-{N-[N-(4-chloro-6-methoxy­pyrimidin-2-yl)carbamo­yl]sulfamo­yl}benzoate
  7. 807
    “…In the title compound, C(6)H(9)N(2)S(+)·Cl(−)·CH(4)N(2)S, the 4,6-di­methyl-2-thioxo-1,2-dihydro­pyrimidin-3-ium cation is proton­ated at one of the pyrimidine N atoms. …”
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    4,6-Dimethyl-2-thioxo-1,2-dihydro­pyrimidin-3-ium chloride–thio­urea (1/1)
  8. 808
    por Zhu, Hai-Bin, Xu, Gang, Sun, Yan-Yan
    Publicado 2009
    “…In the title compound, [Mn(C(11)H(8)N(3)O(2)S)(2)(H(2)O)(4)]·2H(2)O, the Mn(II) ion lies on an inversion centre and is coordinated by four water mol­ecules in equatorial positions and two N atoms from two 2-[4-(3-pyrid­yl)pyrimidin-2-ylsulfan­yl]acetate ligands in the axial positions. …”
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    Tetra­aqua­bis{2-[4-(3-pyrid­yl)pyrimidin-2-ylsulfan­yl]acetato}manganese(II) dihydrate
  9. 809
    “…The title compound, C(12)H(19)BrN(4)O, represents the minor component of the two products obtained in a series of transformations involving the Grignard reaction of tert-butoxy­carbonyl-protected 4-amino­cyclo­hexa­none with MeMgBr, and subsequent inter­action of the obtained amino-substituted cyclo­hexa­nol with 4-chloro-6-methyl­pyrimidin-2-amine followed by bromination with N-bromo­succinimide. …”
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    trans-4-(2-Amino-5-bromo-6-methyl­pyrimidin-4-ylamino)-1-methyl­cyclo­hexa­nol
  10. 810
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    7-(2,4-Dichloro­phen­yl)-2-methyl­sulfanyl­pyrazolo[1,5-a]pyrimidine-3-carbonitrile
  11. 811
    “…In the title compound, C(19)H(22)N(4)O(2), the tetra­hydro­pyrimidine ring adopts an envelope conformation (with the N atom connected to the benzyl group representing the flap). …”
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    3-Benzyl-6-benzyl­amino-1-methyl-5-nitro-1,2,3,4-tetra­hydro­pyrimidine
  12. 812
    “…The mol­ecule is built up from two fused six-membered rings and one five-membered ring linked through a spiro C atom. Both the pyrimidine and the cyclo­pentane rings adopt envelope conformations. …”
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    Spiro­[cyclo­pentane-1,2′(1′H)-pyrido[2,3-d]pyrimidin]-4′(3′H)-one
  13. 813
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    1-(4,6-Dimethyl­pyrimidin-2-yl)-3-(3,5-dinitro­benzo­yl)thio­urea monohydrate
  14. 814
    “…The dihedral angles formed by the two benzene rings with the pyrimidine ring are 70.70 (8) and 88.02 (9)°. The dihedral angle between two benzene rings is 46.67 (10)°.…”
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    1,3-Bis(4-tert-butyl­benz­yl)pyrimidine-2,4(1H,3H)-dione
  15. 815
    “…A series of 2,5,7-trisubstituted pyrimido[4,5-d]pyrimidine cyclin-dependent kinase (CDK2) inhibitors is designed and synthesized. 6-Amino-2-thiouracil is reacted with an aldehyde and thiourea to prepare the pyrimido[4,5-d]-pyrimidines. …”
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    Design, Synthesis and Biological Evaluation of Novel Pyrimido[4,5-d]pyrimidine CDK2 Inhibitors as Anti-Tumor Agents
  16. 816
    por Natarajan, Sampath, Mathews, Rita
    Publicado 2011
    “…An N—H⋯O inter­action occurs between the pyrimidine ring (donor) and carboxyl­ate group (acceptor) while the other ring is formed by N—H⋯N inter­actions, which form a dimer between two symmetry-related salts. …”
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    2,4-Diamino-5-(4-chloro­phen­yl)-6-ethyl­pyrimidin-1-ium 2-propanamido­benzoate
  17. 817
    “…In the title compound, C(18)H(17)N(5)O(2), the pyrimidine ring makes dihedral angles of 66.09 (12), 71.39 (13) and 56.7 (3)° with two phenyl rings and the nitro group, respectively. …”
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    N (4),N (6)-Dimethyl-5-nitro-N (4),N (6)-diphenyl­pyrimidine-4,6-diamine
  18. 818
    “…In the title compound, C(11)H(9)N(5)O, the pyrazolo­pyrimidin-4-one ring system is almost planar, with a maximum deviation of 0.0546 (13) Å for the O atom. …”
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    5-(Pyridin-4-ylmeth­yl)-1H-pyrazolo­[3,4-d]pyrimidin-4(5H)-one
  19. 819
    “…In the mononuclear title complex, [CuI(C(6)H(8)N(2)S)(C(18)H(15)P)(2)], the Cu(I) ion is in a slightly distorted tetra­hedral coordination geometry formed by two P atoms from two triphenyl­phosphane ligands, one S atom from a 4,6-dimethyl­pyrimidine-2(1H)-thione ligand and one iodide ion. There is an intra­molecular N—H⋯I hydrogen bond. …”
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    [4,6-Dimethyl­pyrimidine-2(1H)-thione-κS]iodidobis(triphenyl­phosphane-κP)copper(I)
  20. 820
    “…In the title compound, C(7)H(7)ClN(4)O, the pyrazolo­pyrimidine ring is essentially planar, the r.m.s. deviation of the fitted atoms being 0.0071 Å. …”
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    1-(2-Chloro­eth­yl)-1H-pyrazolo­[3,4-d]pyrimidin-4(5H)-one
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