Novel 5'-deoxy-cytidine derivatives represented by the general formula (I) ##STR1## wherein R.sup.1 is a hydrogen atom or a group easily hydrolyzable under physiological conditions; R.sup.2 is a hydrogen atom, or --CO--OR.sup.4 group [wherein R.sup.4 is a saturated or unsaturated, straight or branched hydrocarbon group consisting of one to fifteen carbon atoms, or a group of the formula --(CH.sub.2).sub.n --Y (in which Y is cyclohexyl or phenyl; n is an integer from 0 to 4)]; R.sup.3 is a hydrogen atom, bromo, iodo, cyano, a C.sub.1-4 alkyl group [which may be substituted with halogen atom(s)], a vinyl or ethynyl group [which may be substituted with halogen atom(s), C.sub.1-4 alkyl, cycloalkyl, aralkyl, or aromatic ring which may have one or more hetero atom(s)], or an aralkyl group which may be substituted for use in medical therapy, especially tumor therapy.
化合物的通用式为(I),其中R1是氢原子或在生理条件下容易
水解的基团;R2是氢原子或--CO--OR4基团[其中R4是由一到十五个碳原子组成的饱和或不饱和、直链或支链的碳氢基团,或者是公式--(
CH2)n--Y的基团(其中Y是环己基或苯基;n是0到4的整数)];R3是氢原子、
溴、
碘、
氰基、C1-4烷基[可以用卤原子替代]、
乙烯基或
乙炔基[可以用卤原子、C1-4烷基、环烷基、芳基烷基或含有一个或多个杂原子的芳环替代]、或者是可替代的芳基烷基用于医学治疗,特别是肿瘤治疗。