-
301por Raczyńska, Ewa Daniela“…In this review, the complete tautomeric equilibria are derived for disubstituted pyrimidine nucleic acid bases starting from phenol, aniline, and their model compounds—monosubstituted aromatic azines. …”
Publicado 2023
Enlace del recurso
Enlace del recurso
Enlace del recurso
Online Artículo Texto -
302“…We used the structural template of phosphomethyl pyrimidine kinase from Thermus thermophilus HB8 for modeling the phosphomethyl pyrimidine kinase structure from Leptospira interrogans serovar lai strain 56601 . …”
Enlace del recurso
Enlace del recurso
Texto -
303“…This finding supports our previous proposal that important steps in the preparation for DNA synthesis occur during G2 of the previous cell cycle, and it indicates that this preparation is connected to the de novo synthesis of pyrimidine deoxynucleotide precursors. The results show that cells are able to enter S-phase in the presence of 100-1,300 p.p.m. (0.01-0.13%) oxygen (here denoted 'moderate hypoxia'), but they are not able to complete DNA synthesis under such conditions. …”
Enlace del recurso
Enlace del recurso
Texto -
304por Cacciari, Barbara, Bolcato, Chiara, Spalluto, Giampiero, Klotz, Karl-Norbet, Bacilieri, Magdalena, Deflorian, Francesca, Moro, Stefano“…Recently, our group synthesized a new series of pyrazolo-triazolo-pyrimidines bearing different substitutions at the N(5) and N(8) positions, which have been described as highly potent and selective human A(3) adenosine receptor antagonists. …”
Publicado 2006
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
305
-
306“…BACKGROUND: The genomic fractions of purine (RR) and alternating pyrimidine/purine (YR) stretches of 10 base pairs or more, have been linked to genomic AT content, the formation of different DNA helices, strand-biased gene distribution, DNA structure, and more. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
307por Nandy, Ashesh“…We report here our observation based on a graphical representation that the intra-purine and intra-pyrimidine differences in sequences of conserved genes generally follow a quadratic distribution relationship and show that this may have arisen from mutations in the sequences over evolutionary time scales. …”
Publicado 2009
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
308“…The title compound, [Cu(C(5)H(3)N(2)O(2))(2)], was prepared in a water–ethanol solution containing 2-cyanopyrimidine, malonic acid and copper(II) nitrate trihydrate. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
309
-
310
-
311“…In the title compound, C(14)H(15)N(3)OS, the phenyl ring is almost perpendicular to the dimethylpyrimidine group, with a dihedral angle of 88.1 (3)°. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
312“…In the title compound, C(10)H(4)Cl(4)N(4)O, the pyridine and pyrimidine rings are nearly perpendicular to each other, the dihedral angle between them being 86.60 (10)°. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
313“…The Co(II) center is six-coordinated by four N atoms from one bis[4-(2-pyridyl)pyrimidin-2-yl] sulfide (L) ligand and two bromide anions, forming an octahedral coordination geometry, where the four donor N atoms are located in the equatorial plane and the Br atoms occupy the axial positions. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
314
-
315
-
316“…In the title compound, C(7)H(9)FN(2)O(2), the methoxy and ethyl groups form dihedral angles of 1.4 (2) and 73.5 (3)°, respectively, with the mean plane of the pyrimidine ring. In the crystal structure, two molecules are linked by a pair of N—H⋯O hydrogen bonds, forming a centrosymmetric dimer.…”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
317
-
318“…In each, the Sn(IV) cation is coordinated by two methyl and two 4,6-dimethylpyrimidine-2-thiolate anions in a distorted SnS(2)C(2) tetrahedral geometry. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
319“…In the title Schiff base compound, C(12)H(11)BrN(4)O·H(2)O, the organic molecule exists in an E configuration with respect to the C=N double bond. The pyrimidine ring is approximately planar, with a maximum deviation of 0.011 (2) Å, and forms a dihedral angle of 10.68 (8)° with the benzene ring. …”
Enlace del recurso
Enlace del recurso
Enlace del recurso
Texto -
320