申请人:Kirin Beer Kabushiki Kaisha
公开号:US04833156A1
公开(公告)日:1989-05-23
A use of the pyrrolidone derivative represented by the following formula [I] as an anti-amnesitc agent: ##STR1## wherein R represents a group ##STR2## X represents --SO.sub.2 -- or --CO--; R' represents a hydrogen atom, a lower alkyl group, a trifluoromethyl group, a halogen atom or a nitro group; n denotes an integer of 1-5; and, when n is an integer of 2 or more, R' may be the same or different, provided that (a) when X is --SO.sub.2 --, there is no case where R' is 3-CF.sub.3, 4-Cl-5-CF.sub.3, 3,5-(CF.sub.3).sub.2 or 3-NO.sub.2 ; (b) when X is --CO--, there is no case where n denotes 1 or 2 and R' is a halogen atom or a nitro group; (c) when X is --SO.sub.2 --, there is no case where n denotes 1 or 2 and R' is a group other than 4-Cl or 3-NO.sub.2 ; and (d) when n denotes 2, there is no case where the groups R' represent the same group which is halogen atom or a nitro group. Typical pyrrolidone derivatives are N-(4'-toluene-sulfonyl)-2-pyrrolidone, N-(4'-chlorobenzenesulfonyl)-2-pyrrolidone, N-benzenesulfonyl-2-pyrrolidone and N-[4'-(1", 1"-dimethylethyl)benzoyl]-2-pyrrolidone, particularly N-(4'-chloro-benzenesulfonyl)-2-pyrrolidone.
以下是使用以下式[I]所表示的吡咯烷酮衍生物作为抗遗忘剂的用途:
##STR1##
其中,R代表一个基团##STR2##
X代表--SO.sub.2--或--CO--;
R'代表氢原子,低碳基,三氟甲基,卤素原子或硝基基团;
n表示1-5的整数;当n为2或更多的整数时,R'可以相同或不同,前提是:
(a)当X为--SO.sub.2--时,不存在R'为3-CF.sub.3、4-Cl-5-CF.sub.3、3,5-(CF.sub.3).sub.2或3-NO.sub.2的情况;
(b)当X为--CO--时,不存在n为1或2且R'为卤素原子或硝基基团的情况;
(c)当X为--SO.sub.2--时,不存在n为1或2且R'为4-Cl或3-NO.sub.2以外的基团的情况;
(d)当n为2时,不存在R'代表相同的基团,该基团为卤素原子或硝基基团的情况。
典型的吡咯烷酮衍生物包括N-(4'-甲苯磺酰基)-2-吡咯烷酮,N-(4'-氯苯磺酰基)-2-吡咯烷酮,N-苯磺酰基-2-吡咯烷酮和N-[4'-(1",1"-二甲基乙基)苯甲酰基]-2-吡咯烷酮,尤其是N-(4'-氯苯磺酰基)-2-吡咯烷酮。