title: Unsaturated acyclic analogues of 2'-deoxyadenosine and thymidine containing fluorine: synthesis and biological activity.
abstract: The syntheses and biological activities of fluorobutynol 11 and (E)- and (Z)-fluorobutenols 8a,d and 9a,d are described. Alkylation of adenine with bromofluorobutyne 13a afforded intermediate 14 which was converted to fluorobutynol 11. Aldehyde 16a and (carbethoxyfluoromethyl)-triphenylphosphonium bromide furnished (E)- and (Z)-fluorobutenoates 19a and 20a accompanied by regioisomer 21a. A similar reaction of compound 16d afforded Z- and E-esters 19d and 20d. Reduction of the mixture of 19a and 20a with DIBALH gave (E)- and (Z)-fluoroalkenols 8a and 9a. Similarly, the Z-ester 19d gave (Z)-fluoroalkenol 9d. Both 19d and 20d were reduced with NaBH4 to give (Z)- and (E)-fluoroalkenols 9d and 8d. Hydrogenation of 19a and 20a afforded fluoro ester 23. A similar reduction of 8a and 9a led to fluoro alcohol 24 and the defluorinated product 25 which were separated by chromatography on a Bio-Rad AG 1-X2 (OH-) column. (Z)-Fluorobutenol 9a is a substrate for adenosine deaminase, whereas the E-isomer 8a is inert toward the enzyme. By contrast, analogue 8a inhibited the replication and cytopathic effect of HIV-1 in ATH8 cells with an IC50 of approximately 100 microM, but the Z-isomer 9a was inactive. This effect was accompanied by 36% cytotoxicity at 100 microM. Compounds 11 and 8d inhibited the growth of murine leukemia L1210 culture with IC50 = 89 and 60 microM, respectively.
authors.affiliation: Department of Chemistry, Michigan Cancer Foundation, Detroit 48201.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Xu
authors.forename: Y L
authors.initials: YL
authors.lastname: Qiu
authors.forename: S
authors.initials: S
authors.lastname: Chokekijchai
authors.forename: H
authors.initials: H
authors.lastname: Mitsuya
authors.forename: J
authors.initials: J
authors.lastname: Zemlicka
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives / Q000138:chemical synthesis / Q000494:pharmacology; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis / Q000494:pharmacology; D002417:Cattle; D003839:Deoxyadenosines / Q000138:chemical synthesis* / Q000494:pharmacology*; D006678:HIV / Q000187:drug effects / Q000502:physiology; D006801:Humans; D006845:Hydrocarbons, Fluorinated / Q000138:chemical synthesis* / Q000494:pharmacology*; D007536:Isomerism; D007939:Leukemia L1210 / Q000188:drug therapy; D051379:Mice; D009374:Neoplasms, Experimental / Q000188:drug therapy; D013936:Thymidine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000970:Antineoplastic Agents; D000998:Antiviral Agents; D003839:Deoxyadenosines; D006845:Hydrocarbons, Fluorinated; C092759:fluorobutynol; D000225:Adenine; C058118:2'-deoxyadenosine; D013936:Thymidine