“…These differ in terms of the relative orientations of the aromatic rings: the first is somewhat twisted, while the second is approximately planar [dihedral angles between the pyrimidine and phenyl rings = 39.00 (8) and 4.59 (11)°]. …”
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“…In the crystal, there is a π–π stacking inter­action between inversion-related pyrimidine rings with mean inter­planar spacing of 3.494 (2) Å.…”
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“…Mol­ecules of the title compound, C(13)H(11)N(3)O(3), are connected into centrosymmetric dimers via inter­molecular N—H⋯N hydrogen bonds, generating an R (2) (2)(8) motif. The pyrimidine and the phenyl rings are twisted with respect to each other by an inter­planar angle of 61.3 (1)°.…”
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“…The asymmetric unit of the title compound, C(16)H(14)N(2), contains two independent mol­ecules in which the dihedral angles between the pyrimidine and naphthaline rings are 38.20 (5) and 39.35 (5)°. …”
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“…In the title compound, C(11)H(11)N(3)O, the aromatic rings at either ends of the –CH(2)–NH– link are twisted by 72.58 (8)°; the hy­droxy substituent is a hydrogen-bond donor to an N atom of the pyrimidine ring. The other N atom of the pyrimidine ring is a hydrogen-bond acceptor to the amino group of an inversion-related mol­ecule.…”
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“…In the title compound, C(20)H(21)N(3), the pyrimidine ring is inclined at dihedral angles of 51.57 (4) and 2.49 (4)° to the two phenyl rings. …”
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“…Here we report on a new category of 5–substituted pyrimidine nucleosides as potent inhibitors of Myco–bacterium tuberculosis growth in vitro. …”
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“…BACKGROUND: African trypanosomes are capable of both pyrimidine biosynthesis and salvage of preformed pyrimidines from the host, but it is unknown whether either process is essential to the parasite. …”
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“…The title compound, C(5)H(6)N(4)O, is approximately planar, with an angle of 11.04 (15)° between the planes of the pyrimidine ring and the non-H atoms of the carboximidamide unit. …”
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“…In this article, we report that fenarimol (FM), a pyrimidine-type fungicide, exhibits potent inhibitory activity against BR biosynthesis. …”
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“…The title compound, C(19)H(22)N(2)O(3), {systematic name (1aR,4E,7aS,8E,10aS,10bR)-1a,5-dimethyl-8-[(pyrimidin-5-yl)­methylid­ene]-2,3,6,7,7a,8,10a,10b-octa­hydro­oxireno[2′,3′:9,10]cyclo­deca­[1,2-b]furan-9(1aH)-one} was obtained from the reaction of parthenolide [systematic name (1aR,7aS,10aS,10bR,E)-1a,5-dimethyl-8-methyl­ene-2,3,6,7,7a,8,10a,10b-octa­hydro­oxireno[2′,3′:9,10]cyclodeca­[1,2-b]furan-9(1aH)-one] with 5-bromo­pyrimidine under Heck reaction conditions, and was identified as an E isomer. …”
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“…So far, a common approach to study processes at the molecular level has been to carry out investigations with single biomolecular building blocks like pyrimidine as model molecules. Electron attachment to single pyrimidine, as well as to pure clusters and hydrated clusters, was investigated in this study. …”
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“…A series of methylpalladium(II) complexes with pyrimidine-NHC ligands carrying different aryl- and alkyl substituents R ([((pym)^(NHC-R))Pd(II)(CH(3))X] with X = Cl, CF(3)COO, CH(3)) has been prepared by transmetalation reactions from the corresponding silver complexes and chloro(methyl)(cyclooctadiene)palladium(II). …”
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“…Moreover, the prebiotic syntheses of pyrimidine and purine nucleotides that have been demonstrated operate under mutually incompatible conditions. …”
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“…Here, we studied the direction-dependent mechanical and thermal properties of 5-n-octyl-2-(4-n-octyloxy-phenyl)-pyrimidine (PYP8O8) in a wide temperature range, covering five phases (i.e., crystalline, smectic C, smectic A, nematic, and liquid), by Brillouin light spectroscopy and temperature wave analysis, respectively. …”
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“…The structure of a 22-base-pair RNA helix with mismatched pyrimidine base pairs is reported. The helix contains two symmetry-related CUG sequences: a triplet-repeat motif implicated in myotonic dystrophy type 1. …”
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