title: 7-Deaza-2'-deoxyguanosine.
abstract: In the title compound, 2-amino-7-(2-deoxy-beta-D-erythro-pentofuranosyl)-3,7-dihydropyrrolo[2,3-d]pyrimidin-4-one, C11H14N4O4, the N-glycosylic bond torsion angle, chi, is anti [-106.5 (3) degrees ]. The 2'-deoxyribofuranosyl moiety adopts the 3T4 (N-type) conformation, with P = 39.1 degrees and tau(m) = 40.3 degrees . The conformation around the exocyclic C-C bond is ap (trans), with a torsion angle, gamma, of -173.8 (3) degrees . The nucleoside forms a hydrogen-bonded network, leading to a close-packed multiple-layer structure with a head-to-head arrangement of the bases. The nucleobase interplanar O=C-C...NH(2) distance is 3.441 (1) A.
authors.affiliation: Laboratorium für Organische und Bioorganische Chemie, Institut für Chemie, Universität Osnabrück, 49069 Osnabrück, Germany. frank.seela@uni-osnabrueck.de
authors.forename: Frank
authors.initials: F
authors.lastname: Seela
authors.forename: Khalil I
authors.initials: KI
authors.lastname: Shaikh
authors.forename: Henning
authors.initials: H
authors.lastname: Eickmeier
mesh_terms: D018360:Crystallography, X-Ray; D003849:Deoxyguanosine / Q000031:analogs & derivatives* / Q000737:chemistry; D006860:Hydrogen Bonding; D015394:Molecular Structure; D009690:Nucleic Acid Conformation
chemical_list: C045550:7-deaza-2'-deoxyguanosine; D003849:Deoxyguanosine