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 of 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 tumours. Processes for preparing the compounds, intermediates useful in their preparation, pharmaceutical compositions containing them and their use in the treatment of tumours are also described.
通式(I)的化合物 ##STR1## 其中R.sup.1代表一个可选取代的碳环或杂环芳基,或一个可选取代的烷基,烯基,环烷基或环烯基;R.sup.2代表一个可选取代的烷基,烯基,炔基,环烷基或环烯基,或一个可选取代的碳环或杂环芳基或芳基烷基;R.sup.3代表一个氢原子或一个烷基;而X代表一个氧原子或
硫原子,一个基团--CH.sub.2--或一个基团NR.sup.4,其中R.sup.4代表一个C.sub.1-4烷基的氢原子;Y代表一个基团--CH.sub.2--或--CH.sub.2 CH.sub.2--,或者X--Y在一起代表基团--CH.dbd.CH--;它们的盐和生理功能衍
生物在治疗肿瘤方面很有用。还描述了制备这些化合物的过程,制备中有用的中间体,含有它们的制药组合物以及它们在治疗肿瘤方面的用途。