title: Synthesis and potent anti-HIV-1 activity of novel 6-benzyluracil analogues of 1-[(2-hydroxyethoxy)methyl]-6-(phenylthio)thymine.
abstract: Ethyl 2-alkyl-4-aryl-3-oxobutyrates were synthesized from the corresponding arylacetonitriles and 2-bromo esters. Condensation of the butyrates with thiourea followed by treatment with chloroacetic acid afforded the 5-alkyl-6-(arylmethyl)uracils. Condensation of the uracils with acetals using trimethylsilyl triflate (TMS triflate) as a catalyst gave acyclic 5-alkyl-6-(arylmethyl)uracil derivatives. 6-Benzyl-5-ethyluracil was also condensed with methyl 5-O-(tert-butyldiphenylsilyl)-2-deoxy-3-O-(phenoxythiocarbonyl+ ++)-alpha,beta-D-erythro-pentofuranoside, followed by Barton reduction and deprotection, to give the anomers of 6-benzyl-5-ethyl-2',3'-dideoxyuridine. Alkylation of the uracils with alkyl chloromethyl sulfides gave new thio analogues of HEPT. All new N1-substituted uracils were tested for activity against HIV-1, and the thio analogues were found extremely potent.
authors.affiliation: Department of Chemistry, Odense University, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Danel
authors.forename: E
authors.initials: E
authors.lastname: Larsen
authors.forename: E B
authors.initials: EB
authors.lastname: Pedersen
authors.forename: B F
authors.initials: BF
authors.lastname: Vestergaard
authors.forename: C
authors.initials: C
authors.lastname: Nielsen
mesh_terms: D000478:Alkylation; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D002455:Cell Division / Q000187:drug effects; D015195:Drug Design; D015497:HIV-1 / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D013329:Structure-Activity Relationship; D013601:T-Lymphocytes / Q000187:drug effects / Q000821:virology; D013941:Thymine / Q000031:analogs & derivatives* / Q000494:pharmacology; D014498:Uracil / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology / Q000633:toxicity; D014779:Virus Replication / Q000187:drug effects*
chemical_list: D000998:Antiviral Agents; C061818:1-((2-hydroxyethoxy)methyl)-6-(phenylthio)thymine; D014498:Uracil; D013941:Thymine