4-(Aminomethyl)-1-benzyl-2-oxopyrrolidine (VI) was transformed by treatment with (4-benzhydrylpiperazin-1-yl)carbonyl chlorides IIIb - IIId and with (4-methylpiperazin-1-yl)carbonyl chloride (IIIa) to the carboxamides IVa - IVd. Heating of 1-(ethoxycarbonylmethyl)-2,4-dioxopyrrolidine (XIX) in acetonitrile in the presence of water afforded XVIIIa. Treatment with ammonia led to the diamide XVIIIc, while alkaline hydrolysis of XVIIIa gave the dicarboxylic acid XVIIIb. 4-(Aminomethyl)-1-(4-methylthiobenzyl)-2-oxopyrrolidine (XII) was prepared by the reaction of 4-(methylthio)benzylamine with itaconic acid and the following sequence of reactions starting from the obtained carboxylic acid VII including esterification, reduction and treatment the obtained alcohol IX with thionyl chloride, synthesis of phthalimido derivative XI and hydrazinolysis. Amine XII added to 4-chlorophenyl isocyanate formed XIII. The compounds prepared were tested for nootropic activity.
4-(氨甲基)-1-苄基-2-氧代吡咯烷(VI)经过与(4-苄基哌嗪-1-基)羰基氯化物IIIb - IIId和(4-甲基哌嗪-1-基)羰基氯化物(IIIa)处理后转化为羧酰胺IVa - IVd。在乙腈中加水加热1-(乙氧羰基甲基)-2,4-二氧代吡咯烷(XIX)得到XVIIIa。与氨处理得到二酰胺XVIIIc,碱性水解XVIIIa得到二羧酸XVIIIb。4-(氨甲基)-1-(4-甲硫基苄基)-2-氧代吡咯烷(XII)通过4-(甲硫基)苄胺与顺丁二酸反应以及从得到的羧酸VII开始的一系列反应制备,包括酯化、还原和用氯化亚砜处理得到的醇IX,合成邻苯二甲酰亚胺衍生物XI和水解。胺XII加入4-氯苯基异氰酸酯形成XIII。制备的化合物进行了智力活性测试。