title: Synthesis, structural studies and antitumoral evaluation of C-6 alkyl and alkenyl side chain pyrimidine derivatives.
abstract: The synthetic route for introduction of fluorophenylalkyl (compounds 5, 7, 14 and 15) and fluorophenylalkenyl (compounds 4E and 13) side chains at C-6 of the pyrimidine nucleus involved the lithiation of the pyrimidine derivatives 1, 2 and 11 and subsequent nucleophilic addition or substitution reactions of the organolithium intermediate thus obtained with 2-fluorophenylacetone, 4-fluoroacetophenone or ethyl 4-fluorobenzoate as electrophiles. The structures of novel compounds were confirmed by (1)H-, (19)F- and (13)C-NMR and MS. Compounds 8 and 10 containing unsaturated fluorophenylalkyl side chains showed better inhibitory effect than their saturated fluorophenylalkylated pyrimidine counterparts 7 and 9. A conformational study based on NOE enhancements showed the importance of the double bond and substitution in the side chain for the conformational preferences in relation to inhibitory activity. Among all tested compounds, C-5 furyl (12) and phenyl (13 and 15) substituted pyrimidine derivatives showed significant cytostatic activities against all tested tumor cell lines.
authors.affiliation: Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 20, P.O. Box 177, HR-10000 Zagreb, Croatia. prekupec@fkit.hr
authors.forename: Svjetlana
authors.initials: S
authors.lastname: Kristafor
authors.forename: Tatjana Gazivoda
authors.initials: TG
authors.lastname: Kraljević
authors.forename: Damjan
authors.initials: D
authors.lastname: Makuc
authors.forename: Janez
authors.initials: J
authors.lastname: Plavec
authors.forename: Lidija
authors.initials: L
authors.lastname: Suman
authors.forename: Marijeta
authors.initials: M
authors.lastname: Kralj
authors.forename: Silvana
authors.initials: S
authors.lastname: Raić-Malić
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D002453:Cell Cycle; D045744:Cell Line, Tumor; D002855:Chromatography, Thin Layer; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D011743:Pyrimidines; C030986:pyrimidine