| abstract |
The invention relates to compounds of the formula I in which X is oxygen or sulfur, ring A is unsubstituted or by one to three identical or different substituents from the group hydroxyl, hydroxyC 1-7 alkyl, etherified hydroxy, etherified hydroxyC 1-7 alkyl, acyloxy, acyloxy C 1-7 alkyl, halogen, C 1-7 alkyl, trifluoromethyl, amino, mono- or di-C 1-7 alkylamino and acylamino, or ring A is substituted by a C 1-7 alkylenedioxy. R is hydrogen, C 1-7 -alkyl or aryl-C 1-7 -alkyl, R 1 is hydrogen, C 1-7 -alkyl, C 1-7 -alkylthio-C 1-7 -alkyl, amino, acylamino, (Amino, mono- or di-C 1-7 -alkyl- (emino) -C 1-7 -alkylcarbamoyl, and R 2 to R 5 are hydrogen or C 1-7 -alkyl, furthermore their dehydro derivatives with a double bond in 1,2-position or in 1,10b-position, in the latter case R 5 is absent, and their salts They can be used as psychoactive agents for the treatment of diseases of the CNS and can be prepared by working in appropriate Precursors closes the nitrogen-containing ring between this nitrogen atom and the 4a carbon atom. |