Antitumour tiazofurin analogues embedded with an amide moiety at the C-2′ position
作者:Mirjana Popsavin、Miloš Svirčev、Ljilja Torović、Gordana Bogdanović、Vesna Kojić、Dimitar Jakimov、Saša Spaić、Lidija Aleksić、Velimir Popsavin
DOI:10.1016/j.tet.2011.06.090
日期:2011.9
bromopyruvate, and finally to target C-nucleosides by treatment with ammonia in methanol. In vitro cytotoxicities of tiazofurin analogues against a number of human tumour cell lines were recorded and compared with those observed for the parent molecule (tiazofurin), as well as the commercial antitumour agent doxorubicin (DOX). Analogues 2b–d have shown a potent in vitro cytotoxic activity against human myelogenous
从d-葡萄糖开始已经完成了四种新的噻唑呋林类似物的合成。合成的关键步骤是三步骤级联反应,该步骤使有效的硫化氢介导的2-叠氮基-3- O-酰基-呋喃呋喃糖基氰化物一锅转化为相应的2-烷基酰胺基呋喃核糖基硫代羧酰胺。通过与溴丙酮酸乙酯的环缩合反应,首先将所得的关键中间体转化为受保护的噻唑啉衍生物,最后通过在甲醇中用氨处理,将其转化为目标C-核苷。记录了噻唑呋喃类似物对多种人类肿瘤细胞系的体外细胞毒性,并将其与亲本分子(噻唑呋林)以及市售抗肿瘤药阿霉素(DOX)观察到的毒性进行了比较。类似物2b – d显示了对人骨髓性白血病K562的有效体外细胞毒活性。在实体瘤细胞系中,HT29仅对2d敏感,而HeLa细胞对2a,2b和2d敏感。只有类似物2a对MCF-7细胞具有高度的细胞毒性。没有噻唑呋林类似物对正常的胎儿肺MRC-5细胞表现出任何明显的细胞毒性。Bcl-2的下调,caspase-3的激活和P