DERIVATIVES OF 2-OXO-1-PYRROLIDINE, METHOD FOR THEIR PREPARING AND USING

FIELD: organic chemistry, medicine, pharmacy. ^ SUBSTANCE: invention relates to novel derivatives of 2-oxo-1-pyrrolidine of the formula (I) or their pharmaceutically acceptable salts wherein X means -CA1NR5R6 or -CA1-R8 wherein A1 and A2 mean independently oxygen atom; R1 means hydrogen atom (H), (C1-C20)-alkyl, (C6-C10)-aryl or -CH2-R1a wherein R1a means (C6-C10)-aryl; R3 means H, -NO2, nitrooxy-group, C=N, azido-group, -COOH, amido-group, (C1-C20)-alkyl, (C2-C6)-alkenyl, (C2-C6)-alkynyl, (C6-C10)-aryl, thiazolyl, oxazolyl, furyl, thienyl, pyrrolyl, tetrazolyl, pyrimidinyl, triazolyl, pyridinyl, -COOR11, -COR11 wherein R11 means (C1-C12)-alkyl; R3a means H, (C1-C20)-alkyl, (C2-C6)-alkenyl, (C2-C6)-alkynyl or (C6-C10)-aryl; R5 and R6 are similar or different and each means independently H, (C1-C6)-alkyl, and R8 means -OH and wherein each alkyl can be substituted independently with from 1 to 5 substitutes chosen from halogen atom, isothiocyanate, -OH, -NO2, -CN, azido-group, (C3-C6)-cycloalkyl and (C6-C10)-aryl;, and wherein each (C6-C10)-aryl can be substituted independently with from 1 to 5 substitutes chosen from halogen atom, -NH2, -NO2, azido-group, (C1-C6)-alkoxy-group, (C1-C6)-alkyl and (C1-C6)-halogenalkyl, and wherein each alkenyl can be substituted independently with at least one substitute chosen from halogen atom and -OH, and under condition that at least one radical among R and R3a differs from H, and when compound represent a mixture of possible isomers then X means -CONR5R6; A2 means oxygen atom, and R1 means H, -CH3, -C2H5, -C3H7, and when each R1 and R3a means H and A2 means oxygen atom and X means -CONR5R6 then R3 differs from -COOH, -CH, -COOR11, amido-group, naphthyl, phenyl rings substituted with (C1-C6)-alkoxy-group or halogen atom in para-position in naphthyl or phenyl ring. Compounds of the formula (I) can be used in pharmaceutical compositions for treatment of epilepsy, epileptogenesis, convulsions, epileptic seizures, essential tremor and neuropathic pain. ^ EFFECT: improved method of synthesis, valuable medicinal properties of derivatives and pharmaceutical compositions. ^ 27 cl, 3 tbl, 9 ex