申请人:JAPAN TOBACCO INC.
公开号:EP0384380A2
公开(公告)日:1990-08-29
Peptide derivatives of the following general formula
wherein R1 and R2 are the same or different and respectively mean a hydrogen atom or a C1 -5 alkyl group, R3 and R4 are the same or different and respectively mean a hydrogen atom or a C1 -5 alkyl or phenyl, or R3 and R4 combinedly mean a C2-7 alkylene group, Rs and R6 are the same or different and respectively mean a hydrogen atom or a C1-5 alkyl group, X means -NH-, -O- or -CH2-, Y means -CH2- or -S-, and m and n respectively mean 0 or 1, provided that when X is -NH- or -O-, m is 1 and all of R1, R2, R3 and R4 do not mean a hydrogen atom at the same time; acid addition salts thereof; and pharmaceutical use thereof.
Since the compounds and their acid addition salts of the present invention possess more potent actions on central nervous system (e.g. antagonistic action against hypothermia, locomotor stimulant action, spinal reflex stimulant action), they are of use as a therapeutic medicament for central nervous disorders such as impaired consciousness, depression, hypomnesia, the like in association with schizophrenia, melancholia, senile dementia, sequelae of cerebrovascular disorders, head trauma, epilepsy and spinocerebellar degeneracy.
通式如下的多肽衍生物
其中 R1 和 R2 相同或不同,分别表示氢原子或 C1-5 烷基,R3 和 R4 相同或不同,分别表示氢原子或 C1-5 烷基或苯基,或 R3 和 R4 合起来表示 C2-7 亚烷基、Rs和R6相同或不同,分别表示氢原子或C1-5烷基,X表示-NH-、-O-或-CH2-,Y表示-CH2-或-S-,m和n分别表示0或1,但当X为-NH-或-O-时,m为1,且所有R1、R2、R3和R4不同时表示氢原子;其酸加成盐;及其医药用途。
由于本发明的化合物及其酸加成盐对中枢神经系统具有更强的作用(例如对低体温的拮抗作用、运动刺激作用、脊髓反射刺激作用),因此它们可用作治疗中枢神经疾病的药物,如与精神分裂症、忧郁症、老年痴呆症、脑血管疾病后遗症、头部创伤、癫痫和脊髓小脑变性有关的意识障碍、抑郁、失眠等。