申请人:Dainippon Pharmaceutical Co., Ltd.
公开号:US04889858A1
公开(公告)日:1989-12-26
The present invention relates to compounds represented by the general formula (I): ##STR1## wherein R.sub.1 is H or methoxy, R.sub.2 is H, methoxy, OH or F, R.sub.3 is H or F, R.sub.4 is H or F at 7-, 8- or 9-position, and .circle.Ar is a benzene, thiophene or pyridine ring, provided that (i) at least two of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are H, (ii) R.sub.2 or R.sub.3 is F when R.sub.4 is F, (iii) R.sub.1, R.sub.3 and R.sub.4 are H when R.sub.2 is methoxy or OH, (iv) R.sub.2 and R.sub.3 are not simultaneously F, and (v) R.sub.2 and R.sub.3 are H or F, and both R.sub.1 and R.sub.4 are H when .circle.Ar is a thiophene or pyridine ring, or a physiologically acceptable acid addition salt thereof. The compounds of the present invention have an excellent protective effect against cerebral anoxia and some of them have also an inhibitory effect on lipid peroxidation of mitochondrial membrane of brain and an anti-convulsant activity and are useful as an agent for prevention or treatment of cerebral diseases caused by hypoxia in mammals including human.
本发明涉及由通式(I)表示的化合物:其中R.sub.1为H或甲氧基,R.sub.2为H、甲氧基、羟基或氟,R.sub.3为H或氟,R.sub.4为7-、8-或9-位的H或氟,.circle.Ar为苯、噻吩或吡啶环,前提是(i)至少两个R.sub.1、R.sub.2、R.sub.3和R.sub.4中的H,(ii)当R.sub.4为F时,R.sub.2或R.sub.3为F,(iii)当R.sub.2为甲氧基或羟基时,R.sub.1、R.sub.3和R.sub.4为H,(iv)R.sub.2和R.sub.3不同时为F,(v)R.sub.2和R.sub.3为H或F,当.circle.Ar为噻吩或吡啶环时,R.sub.1和R.sub.4均为H,或其生理上可接受的酸盐。本发明的化合物对大脑缺氧有良好的保护作用,其中一些化合物还具有抑制脑线粒体膜脂质过氧化和抗惊厥活性,可用作预防或治疗包括人类在内的哺乳动物由缺氧引起的脑部疾病的药物。