The nitrogen-bridged compound 2,2'-anhydro-1-beta-D-arabinofuranosyl-2,4-diamino-5-fluoropyrimidinium chloride (2), an analogue of the antitumor agent anhydro-ara-FC (1), has been synthesized. 5-Fluorocytidine was converted into 1-beta-D-ribofuranosyl-2,4-diamino-5-fluoropyrimidinium chloride (4), but cyclization of 4 was not achieved due to a competing side reaction. The nitrogen bridge was therefore
氮桥化合物2,2'-脱
水-1-β-D-阿拉伯
呋喃糖基-2,4-二
氨基-5-
氟嘧啶氯化物(2)是
抗肿瘤药脱
水-阿拉伯-FC(1)的类似物,具有已合成。5-
氟吡啶被转化为1-β-D-
呋喃核糖基-2,4-二
氨基-5-
氟嘧啶氯化物(4),但由于竞争性副反应,未实现4的环化。因此,通过5-
氟异
胞苷(10)的环化作用引入氮桥,得到2,2'-亚
氨基桥联的化合物16。通过标准的亚
硫酰化,S-甲基化和
氨水处理将后者转化为2。 。测试了化合物2以及许多合成中间体在小鼠中针对S180肉瘤的活性。新化合物均未显示出任何抗肿瘤活性。