title: 5-Alkynyl-2'-deoxyuridines: chromatography-free synthesis and cytotoxicity evaluation against human breast cancer cells.
abstract: Starting with 5-iodo-2'-deoxyuridine, a series of 5-alkynyl-2'-deoxyuridines (with n-propyl, cyclopropyl, 1-hydroxycyclohexyl, p-tolyl, p-tert-butylphenyl, p-pentylphenyl, and trimethylsilyl alkyne substituents) have been synthesized via the palladium-catalyzed (Sonogashira) coupling reaction followed by a simplified isolation protocol (76-94% yield). The cytotoxic activity of modified nucleosides against MCF-7 and MDA-MB-231 human breast cancer cells has been determined in vitro. 5-Ethynyl-2'-deoxyuridine, the only nucleoside in the series containing a terminal acetylene, is the most potent inhibitor with IC(50) (microM) 0.4+/-0.3 for MCF-7 and 4.4+/-0.4 for MDA-MB-231.
authors.affiliation: Department of Chemistry and Center for Biomedical Research, Oakland University, 2200 N. Squirrel Rd., Rochester, MI 48309-4477, USA.
authors.forename: Srinivasarao
authors.initials: S
authors.lastname: Meneni
authors.forename: Ingo
authors.initials: I
authors.lastname: Ott
authors.forename: Craig D
authors.initials: CD
authors.lastname: Sergeant
authors.forename: Adam
authors.initials: A
authors.lastname: Sniady
authors.forename: Ronald
authors.initials: R
authors.lastname: Gust
authors.forename: Roman
authors.initials: R
authors.lastname: Dembinski
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000188:drug therapy*; D045744:Cell Line, Tumor; D003857:Deoxyuridine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D003857:Deoxyuridine