Synthesis, Structural Studies and Antitumoral Evaluation of C-6 Alkyl and Alkenyl Side Chain Pyrimidine Derivatives S
作者:Svjetlana Krištafor、Tatjana Gazivoda Kraljević、Damjan Makuc、Janez Plavec、Lidija Šuman、Marijeta Kralj、Silvana Raić-Malić
DOI:10.3390/molecules14124866
日期:——
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 1H-, 19F- and 13C-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.
合成引入氟苯基烷基(化合物 5、7、14 和 15)和氟苯基烯基(化合物 4E 和 13)侧链到嘧啶核的 C-6 位的合成路径涉及对嘧啶衍生物 1、2 和 11 的锂化,以及随后与 2-氟苯基丙酮、4-氟乙酰苯或乙基 4-氟苯甲酸酯作为电亲体的有机锂中间体的亲核加成或取代反应。新化合物的结构通过 1H、19F 和 13C-NMR 及质谱法进行了确认。含有不饱和氟苯基烷基侧链的化合物 8 和 10 显示出比其饱和氟苯基烷基化的嘧啶对应物 7 和 9 更强的抑制效果。基于 NOE 增强的构象研究表明,侧链中的双键和取代基对于构象偏好的重要性与抑制活性相关。在所有测试的化合物中,C-5 位置的呋喃基(12)和苯基(13 和 15)取代的嘧啶衍生物在所有测试的肿瘤细胞系中表现出显著的细胞抑制活性。