title: Synthesis of 3-fluoro-6-S-(2-S-pyridyl) nucleosides as potential lead cytostatic agents.
abstract: The 3-deoxy-3-fluoro-6-S-(2-S-pyridyl)-6-thio-β-D-glucopyranosyl nucleoside analogs 7 were prepared via two facile synthetic routes. Their precursors, 3-fluoro-6-thio-glucopyranosyl nucleosides 5a-e, were obtained by the sequence of deacetylation of 3-deoxy-3-fluoro-β-D-glucopyranosyl nucleosides 2a-e, selective tosylation of the primary OH of 3 and finally treatment with potassium thioacetate. The desired thiolpyridine protected analogs 7a-c,f,g were obtained by the sequence of deacetylation of 5a-c followed by thiopyridinylation and/or condensation of the corresponding heterocyclic bases with the newly synthesized peracetylated 6-S-(2-S-pyridyl) sugar precursor 13, which was obtained via a novel synthetic route from glycosyl donor 12. None of the compounds 6 and 7 showed antiviral activity, but the 5-fluorouracil derivative 7c and particularly the uracil derivative 7b were endowed with an interesting and selective cytostatic action against a variety of murine and human tumor cell cultures.
authors.affiliation: Department of Biochemistry and Biotechnology, University of Thessaly, Greece.
authors.forename: Evangelia
authors.initials: E
authors.lastname: Tsoukala
authors.forename: Niki
authors.initials: N
authors.lastname: Tzioumaki
authors.forename: Stella
authors.initials: S
authors.lastname: Manta
authors.forename: Alexandra
authors.initials: A
authors.lastname: Riga
authors.forename: Jan
authors.initials: J
authors.lastname: Balzarini
authors.forename: Dimitri
authors.initials: D
authors.lastname: Komiotis
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D054697:Cytostatic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D054879:Halogenation; D006801:Humans; D051379:Mice; D009369:Neoplasms / Q000188:drug therapy; D009705:Nucleosides / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000970:Antineoplastic Agents; D054697:Cytostatic Agents; D009705:Nucleosides; D011725:Pyridines
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