| abstract |
Compounds of general formula (I), where Ar = phenyl or beta-naphtyl, R1 = one or more substituents of the phenyl or beta-naphtyl nucleus, preferably in para position, and selected out of the group consisting of H, CH3, C(CH3)3, CH2-CH-(CH3)2, O-CH3, C1, F, Br, CF3, NH2, S-CH3, SO-CH3, CN, NO2; R2 = H, CH3, C2H5, CH(CH3)2, CH2OH, C6H5; R3 = (a); where R4 = H, CH3, C2H5, CH(CH3)2, CH2-C6H5; R5 = H, CH3; X = none O, S, NH, NCH3; Y = O, NH, both in the racemic form and in the isomeric enantiomeric forms, which produce a nootropic effect, i.e. memory enhancement and learning facilitation, as well as an analgesic effect. |