申请人:Ciba-Geigy Corporation
公开号:US04945092A1
公开(公告)日:1990-07-31
Substituted pyrrolidin-2-ones of the formula ##STR1## wherein R.sub.1 represents a phenyl or naphthyl radical that is unsubstituted or substituted by lower alkyl, lower alkloxy, halogen and/or trifluoromethyl, X.sub.1 represents lower alkylidene, X.sub.2 represents methylene, ethylene or oxoethylene and R.sub.2 represents hydrogen, lower alkyl or a radical of the formula ##STR2## wherein X.sub.4 represents lower alkylidene and R.sub.3 represents hydrogen or a phenyl or a phenyl naphthyl radical that is unsubstituted by lower alkyl, lower alkoxy, halogen and/or trifluoromethyl, and their pharmaceutically acceptable salts, have nootropic properties and can be used as nootropic active ingredients in medicaments. They are prepared, for example, by condensing with one another compounds of the formulae ##STR3## wherein Z.sub.1 represents a group of the formula --X.sub.1 --(.dbd.O)--Z.sub.3 (IIa) and Z.sub.2 represents hydrogen, or Z.sub.1 represents hydrogen and Z.sub.2 represents a group of the formula --C(.dbd.O) --X.sub.1 --Z.sub.4 (IIIa), wherein each of Z.sub.3 and Z.sub.4 represents a removable radical and R.sub.2 ' represnts a radical R.sub.2 or amino-protecting group, or their salts, and removing an amino-protecting R.sub.2 ' which may be present.
化学式为##STR1##的吡咯烷酮取代物,其中R.sub.1代表未取代或取代为较低烷基、较低烷氧基、卤素和/或三氟甲基的苯基或萘基基团,X.sub.1代表较低烷基亚甲基,X.sub.2代表亚甲基、乙烯基或氧乙烯基,R.sub.2代表氢、较低烷基或化学式##STR2##的基团,其中X.sub.4代表较低烷基亚甲基,R.sub.3代表氢或未取代或取代为较低烷基、较低烷氧基、卤素和/或三氟甲基的苯基或苯基萘基团,以及它们的药学上可接受的盐,具有智力增强作用,并可用作药物中的智力增强活性成分。例如,它们可以通过将具有以下化学式的化合物相互缩合制备:##STR3##其中Z.sub.1代表化学式--X.sub.1--(.dbd.O)--Z.sub.3 (IIa)的基团,Z.sub.2代表氢,或Z.sub.1代表氢,Z.sub.2代表化学式--C(.dbd.O)--X.sub.1--Z.sub.4 (IIIa)的基团,其中Z.sub.3和Z.sub.4中的每一个代表可移除的基团,R.sub.2 '代表基团R.sub.2或氨基保护基团,或它们的盐,并去除可能存在的氨基保护基团R.sub.2 '。