Uracil derivatives

摘要

New uracil derivatives of the general formula: <IMAGE> wherein R1 stands for a hydrogen atom or a grouping of the formula: <IMAGE> R2 for a hydrogen atom, an alkyl group or a phenyl group and R3 for an alkyl group or a phenyl group, with the proviso that when both R1 and R2 stand for a hydrogen atom, R3 stands for a phenyl group or a straight chain alkyl group with 3 DIFFERENCE 11 carbon atoms, that when R1 stands for a hydrogen atom and R2 for methyl group, R3 stands for an alkyl group with at least 2 carbon atoms or a phenyl group, and that when R1 stands for a hydrogen atom and R3 for methyl group, R2 stands for an alkyl group with at least 2 carbon atoms or a phenyl group. These uracil derivatives are prepared by reacting 5-fluorouracil with an alpha -haloalkyl carboxylate or with an aldehyde diacylate or by hydrolyzing a 1,3-bis(acyloxymethyl)-5-fluorouracil with an acid or alkali. These uracil derivatives are useful as improved anti-tumor agents especially for oral administration and injection.