The present invention provides compounds of the formula:
wherein R' is a uracilyl, cytosinyl, hypoxanthinyl, adeninyl or thiazolyl radical, which may be substituted by halogen or carbamoyl;
R2 is a nitrogen-containing unsaturated heterocyclic radical, which may be substituted by oxo or lower alkyl; and
R3 is a hydrogen atom or a phosphono group; and the pharmaceutically-acceptable salts thereof.
The present invention also provides processes for the preparation of these compounds and pharmaceutical compositions containing them and provides a method of treating cancer which comprises administering these compounds to humans and animals.
本发明提供了式中化合物:
其中 R'是尿
嘧啶基、
胞嘧啶基、
次黄嘌呤基、
腺嘌呤基或
噻唑基,可被卤素或
氨基甲酰基取代;
R2 是含氮不饱和杂环基,可被氧代或低级烷基取代;以及
R3 是氢原子或膦酰基;及其药学上可接受的盐类。
本发明还提供了制备这些化合物和含有这些化合物的药物组合物的工艺,并提供了一种治疗癌症的方法,该方法包括向人和动物施用这些化合物。