NOVEL SUBSTITUTED PYRROLIDINONE

摘要

The invention relates to substituted pyrrolidinones of general formula (1) wherein R1 represents a phenyl group which may be mono- or di-substituted by methyl, methoxy, fluorine, chlorine, bromine or trifluoromethyl, or a pyridyl group; R2 represents hydrogen or a straight-chained or branched alkyl group with 1-4 carbon atoms; R3 represents a straight-chained or branched alkyl group with 1-3 carbon atoms, a hydroxyalkyl group with 2-3 carbon atoms, a phenyl group which can be mono- or di-substituted by chlorine, bromine, methyl or methoxy, a cyclohexyl group or a dialkylamino alkyl group, where in each alkyl group can contain from 1-3 carbon atoms; R4 represents hydrogen or a straight-chained or branched alkyl group with 1-3 carbon atoms; or R3 and R4 together with the nitrogen atom represent a piperidine, morpholine or piperazine ring, while the ring may be substituted by 1 or 2 methyl groups and the piperazine ring at the nitrogen atom in 4-position may also carry a phenyl, chlorophenyl or benzyl group, or they may represent the nortropanyl group, processes for preparing them and pharmaceutical compositions. The new compounds have proved effective in animal trials in alleviating or remedying conditions or restricted cerebral performance.