6-Substituted and 5,6-Disubstituted Derivatives of Uridine: Stereoselective Synthesis, Interaction with Uridine Phosphorylase, and <i>in Vitro</i> Antitumor Activity
作者:Krzysztof Felczak、Alicja K. Drabikowska、Juhani A. Vilpo、Tadeusz Kulikowski、David Shugar
DOI:10.1021/jm950675q
日期:1996.1.1
hydrogen bond with the enzyme. The 5-fluoro-6-substituted uridines were the poorest substrates. Cytotoxicities of the nucleosides were examined vs the human tumor cell lines MOLT-3, U-937, K-562, and IM-9, as well as PHA-stimulated human lymphocytes. Two of the analogues, 5-fluoro-6-(fluoromethyl)uridine (42) and 5-fluoro-6-(hydroxymethyl)uridine (40), exhibited cytotoxicities comparable to that of 5-fluorouracil
描述了通过路易斯酸催化的(a)三甲基硅烷化的6-烷基-4-烷基硫尿嘧啶与1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-的缩合反应合成6-烷基尿苷的立体选择程序。 D-核呋喃糖(ABR)和(b)三甲基甲硅烷基化的6-烷基-3-苄基尿嘧啶与ABR。随后通过使用配合物BBr3-THF的新的改性方法,使用1N三氟乙酸除去4-甲硫基,并除去3-苄基。此外,通过依次用SeO 2氧化并用四丁基硼氢化铵还原6-甲基尿苷(5)获得6-(羟甲基)尿苷(39)和5-氟-6-(羟甲基)尿苷(40)。分别通过39和40的DAST处理,获得了5-氟-6-甲基尿苷和3-氟-6-甲基尿苷(35),以及它们相应的6-氟甲基同源物41和42。对于前述关于糖基键的固定顺式构象的所有核苷,1 H NMR光谱进一步证实戊糖环主要存在于构象N(3'-内)。大多数核苷是大肠杆菌嘧啶核苷磷酸化酶的弱底物。其中两个39和41具有6-C