Compounds of the general formula: ##STR1## wherein X represents a halogen atom or a trifluoromethyl group; R.sup.1 represents a hydrogen atom or a lower alkyl group and Het represents an optionally substituted C-attached 5-7 membered aromatic heterocyclic ring which ring contains one or more heteroatoms selected from O, N and S and optionally carries a fused ring 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.
通式化合物:##STR1##其中X代表卤素原子或三
氟甲基;R1代表氢原子或低级烷基,Het代表可选择性取代的C连接的5-7元芳香杂环,该环含有一个或多个选自O、N和S的杂原子,并可选择性地带有融合环,且当存在酸性或碱性基团时,其盐已被发现具有优异的染色体中期阻滞能力,并可用于对抗异常细胞增殖。因此,了解正常和异常细胞的分裂周期使得可以在异常细胞处于易受攻击阶段时给予细胞毒性药物,而正常细胞处于非易受攻击阶段。本发明的化合物通过烷基化、保护酮基的去保护、氧化或亲电卤化制备。