Substituted pyrimidin-2-ones, the salts thereof, processes for their preparation, pharmaceutical compositions containing them and a method therefor

摘要

Compounds of the general formula: <IMAGE> I (wherein X represents a halogen atom or a trifluoromethyl group; R1 represents an optionally substituted C6-10 carbocyclic aromatic group; and R2 represents a hydrogen atom or a lower alkyl, C7-16 aralkyl or C6-10 aryl group or the group COR1a, in which R1a is as defined for R1, R1 and R1a being the same or different) and where an acidic or basic group is present, the salts thereof have been found to possess excellent metaphase arresting ability and are of use in combating abnormal cell proliferation. Thus a knowledge of the cell division cycles of the normal and abnormal cells enables a cytotoxic drug to be administered while the abnormal cells are in a phase susceptible to attack and while the normal cells are in a non-susceptible phase. The compounds of the invention are prepared by alkylation, deprotection of a protected keto group, oxidation or electrophilic halogenation. Pharmaceutical compositions containing the compounds of formula I, and where appropriate, the physiologically compatible salts thereof; and methods for the use of the compounds are described and claimed.