5-Benzyloxymethyl-2'-deoxyuridine 3', 5'-di-p-toluate (III), a key intermediate in the preparation of 5-substituted 2'-deoxyuridines (VIa-d), was prepared in satisfactory yield. 5-(4-Substituted phenylthiomethyl)-2'-deoxyuridines (VIa-d) were synthesized in three steps from III. The reaction of silylated orotates (VIIa-e) with 1-O-acetyl-2, 3, 5-tri-O-benzoyl-β-D-ribofuranose (VIII) gave the N1, N3-bisribosides (IXa-e) and the N3-ribosides (Xa-e). The N3-ribosides (Xa-e) were deprotected to give the N3-nucleosides (XIa-e). Compounds VIa-d and XIa-e were tested for ability to inhibit the growth of L-1210 cells in vitro.
5-苄氧基甲基-
2'-脱氧尿苷3', 5'-二
对甲苯甲酸酯(III)是制备5-取代的
2'-脱氧尿苷(VIa-d)的关键中间体,其收率令人满意。从III开始分三个步骤合成5-(4-取代的苯
硫基甲基)-
2'-脱氧尿苷(VIa-d)。甲
硅烷基化
乳清酸酯(VIIa-e)与1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-D-
呋喃核糖(VIII)反应得到N1,N3-双
核糖苷(IXa-e)和N3-核苷(Xa-e)。将N3-核苷(Xa-e)去保护以得到N3-核苷(XIa-e)。测试了化合物VIa-d和XIa-e在体外抑制L-1210细胞生长的能力。