Structure based design, synthesis and in vitro antitumour activity of tiazofurin stereoisomers with nitrogen functions at the C-2′ or C-3′ positions
作者:Vesna Kojić、Mirjana Popsavin、Saša Spaić、Dimitar Jakimov、Ivana Kovačević、Miloš Svirčev、Lidija Aleksić、Bojana Srećo Zelenović、Velimir Popsavin
DOI:10.1016/j.ejmech.2019.111712
日期:2019.12
The tiazofurin analogues were evaluated for their antitumour activities in cell-culture-based assays. Compounds 3, 4 (d-xylo) and 7 (d-arabino), showed remarkable antitumour activities, with IC50 values in the range of 4-7 nM. Preliminary structure-activity relationship allowed identification of two analogues with antiproliferative activities exceeding that of the parent compound 1 for several orders
从d-葡萄糖开始,已设计并合成了三个具有d-阿拉伯立体化学和在C-2'位置(5-7)具有氮官能团的氮官能团的新的噻唑呋林类似物。已知的d-xylo立体异构体1(化合物2)以及两个在C-3'(3和4)带有氮官能团的新类似物也已由相同的糖前体合成。合成过程由以下三个阶段组成:(i)多步合成适当保护的戊呋喃糖基氰化物,(ii)通过将所得的呋喃呋喃糖基氰化物与l-半胱氨酸乙酯进行环缩合,然后再将其制得的呋喃呋喃糖基氰化物环化,来构建乙基噻唑-4-羧酸酯部分。脱氢,以及(iii)使用酯氨解将噻唑-4-甲酸乙酯最终转化为目标噻唑呋喃类似物。在基于细胞培养的测定中评估了噻唑呋林类似物的抗肿瘤活性。化合物3、4(d-xylo)和7(d-阿拉伯糖)显示出显着的抗肿瘤活性,IC50值在4-7 nM范围内。初步的结构-活性关系允许鉴定两个具有超过母体化合物1的抗增殖活性的类似物几个数量级(例如,抗Raji的比为