2′-Deoxy-5-fluorouridine derivatives of the formula
wherein, R¹ is hydrogen atom or an acyl group and R² and R³ are respectively hydrogen atom, an acyl group or a group of the formula
wherein X¹ and X² are respectively oxygen atom or sulfur atom; R⁴ is a phenyl group, a benzyl group or a naphthyl group each of which may be substituted by an alkyl group, an alkoxyl group, an alkoxycarbonyl group, an alkylthio group, an acyl group, a halogen atom, trifluoromethyl group, nitro group, cyano group, carboxyl group and/or methylenedioxy group and R⁵ is an alkyl group, an alkenyl group or one of the groups represented by R⁴ which is the same as or different from R⁴, at least one of R² and R³ being a group of the formula
which exhibit excellent antitumour activities and have lower toxicity, methods of the production thereof and antitumour compositions containing said 2′-deoxy-5-fluorouridine derivatives.
式中的 2′-脱氧-
5-氟尿苷衍
生物
其中,R¹为氢原子或酰基,R²和R³分别为氢原子、酰基或式中的基团
其中,X¹ 和 X² 分别为氧原子或
硫原子;R⁴ 是苯基、苄基或
萘基,每个苯基、苄基或
萘基可被烷基、烷氧基、烷氧羰基、烷
硫基、酰基、卤素原子、三
氟甲基、硝基、
氰基、羧基、卤素原子、三
氟甲基、硝基、
氰基、羧基取代、R⁵是烷基、烯基或与 R⁴ 相同或不同的 R⁴ 所代表的基团之一,R² 和 R³ 中至少有一个是式中的基团。
这些衍
生物具有优异的抗肿瘤活性和较低的毒性,其生产方法以及含有所述 2′-脱氧-5-
氟尿
嘧啶衍
生物的抗肿瘤组合物。