title: Synthesis and studies of 3'-C-trifluoromethyl nucleoside analogues bearing adenine or cytosine as the base.
abstract: 3'-Deoxy-3'-C-CF3, 2',3'-dideoxy-3'-C-CF3 and 2',3'-unsaturated-3'-C-CF3 nucleoside derivatives of adenosine and cytidine have been synthesized. All these derivatives were prepared by glycosylation of adenine and uracil with a suitable peracylated 3-trifluoromethyl sugar precursor. The resulting protected nucleosides were subject to appropriate chemical modifications to afford the target nucleoside derivatives. Additionally, the chemical stability in acidic and neutral media of the 2',3'-dideoxy-3'-C-CF3 and 2',3'-unsaturated-3'-C-CF3 nucleoside derivatives of adenosine was compared to that of their parent nucleosides 2',3'-dideoxyadenosine (ddA) and 2',3'-dideoxy-2',3'-didehydroadenosine (d(4)A). Our results confirm that addition of a trifluoromethyl group at C-3' on such nucleoside derivatives appears to confer increased chemical stability toward acid-catalyzed cleavage of the glycosidic bond comparatively to their parent counterparts. When evaluated for their antiviral activity in cell culture experiments, two compounds, namely, 2',3'-dideoxy-3'-C-CF3-adenosine and 2',3'-dideoxy-2',3'-didehydro-3'-C-CF3-cytidine exhibited moderate anti-HBV activity with EC50 values of 10 and 5 microM, respectively.
authors.affiliation: Laboratoire de Chimie Organique Biomoléculaire de Synthèse, UMR 5625 CNRS-UM II, Université Montpellier II, case courrier 008, Place Eugène Bataillon, 34095 Montpellier, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Jeannot
authors.forename: Gilles
authors.initials: G
authors.lastname: Gosselin
authors.forename: David
authors.initials: D
authors.lastname: Standring
authors.forename: Martin
authors.initials: M
authors.lastname: Bryant
authors.forename: Jean Pierre
authors.initials: JP
authors.lastname: Sommadossi
authors.forename: Anna
authors.initials: A
authors.lastname: Giulia Loi
authors.forename: Paolo
authors.initials: P
authors.lastname: La Colla
authors.forename: Christophe
authors.initials: C
authors.lastname: Mathé
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D005617:Chlorofluorocarbons, Methane; D003596:Cytosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D004355:Drug Stability; D015497:HIV-1 / Q000187:drug effects; D006515:Hepatitis B virus / Q000187:drug effects; D006801:Humans; D020128:Inhibitory Concentration 50; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured
chemical_list: D000998:Antiviral Agents; D005617:Chlorofluorocarbons, Methane; D003596:Cytosine; D000241:Adenosine; C009554:fluoroform