Subject of the present invention are compounds of general formula (I), wherein A is oxygen or sulfur; X is oxygen or sulfur, R1 and R2 are independently hydrogen or an alkyl group with from 1 to 6 carbon atoms; R is selected from alkyl, cycloalkyl, alkylsulphinyl, alkylsulphonyl, hydroxyalkyl, napthtyl, phenyl group which can be unsubsituted or substituted; or R is a 5- or 6-membered heterocycle containing from 1 to 3 heteroatoms selected from oxygen, sulfur and nitrogen, which can be optionally benzocondensed, the pure steroisomers or mixtures thereof as well as salts thereof with pharmaceutically acceptable acids or bases, for the use as medicaments, in particular as antitumor agents.
1
                            本发明的主题是一般式(I)的化合物,其中A为氧或
硫;X为氧或
硫,R1和R2分别为氢或具有1至6个碳原子的烷基;R选自烷基、环烷基、烷基磺酰基、烷基磺酰基、羟基烷基、
萘基、苯基,可以是未取代或取代的;或R是含有1至3个氧、
硫和氮杂原子的5或6元杂环,可以选择性地与苯并联,其纯立体异构体或其混合物以及与药物可接受的酸或碱形成的盐,用作药物,特别是作为抗肿瘤剂。