Compounds of general formula (I) ##STR1## wherein R.sup.1 represents an optionally substituted carbocyclic or heterocyclic aryl group, or an optionally substituted alkyl, alkenyl, cycloalkyl or cycloalkenyl group; R.sup.2 represents an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl group or an optionally substituted carbocyclic or heterocyclic aryl or aralkyl group; R.sup.3 represents a hydrogen atom or an alkyl group; and either X represents an oxygen or sulphur atom, a group, --CH.sub.2 -- or a group NR.sup.4 where R.sup.4 represents a hydrogen atom or a C.sub.1-4 alkyl group; and Y represents a group --CH.sub.2 -- or --CH.sub.2 CH.sub.2 -- or X--Y together represent the group --CH.dbd.CH--; and salts and physiologically functional derivatives thereof are useful in the treatment of tumors. Processes for preparing the compounds, intermediates useful in their preparation, pharmaceutical compositions containing them and their use in the treatment of tumors are also described.
通式(I)的化合物##STR1##
其中,R.sup.1代表可选取代的碳环或杂环芳基基团,或可选取代的烷基,烯基,环烷基或环烯基基团;R.sup.2代表可选取代的烷基,烯基,炔基,环烷基或环烯基基团,或可选取代的碳环或杂环芳基或芳基烷基基团;R.sup.3代表氢原子或烷基基团;X表示氧或
硫原子,或者是一个基团,--CH.sub.2--或基团NR.sup.4,其中R.sup.4代表氢原子或C.sub.1-4烷基基团;Y表示基团--CH.sub.2--或--CH.sub.2 CH.sub.2--,或者X--Y一起表示基团--CH.dbd.CH--;它们的盐和生理功能衍
生物在肿瘤治疗中有用。还描述了制备这些化合物的过程,用于制备它们的中间体,含有它们的制药组合物以及它们在肿瘤治疗中的应用。