申请人:Eisai R&D Management Co., Ltd.
公开号:US08563565B2
公开(公告)日:2013-10-22
A compound and/or pharmacologically acceptable salt thereof represented by the formula (I) has PDE9 inhibitory action, so that the intracerebral cGMP concentration is anticipated to be elevated. The PDE9 inhibitory action and the increase in cGMP lead to the improvement of learning and memory behaviors, and the compound (I) has a potential use of a therapeutic agent for cognitive dysfunctions in Alzheimer's disease.
wherein R1 is a hydrogen atom; R2 is an aromatic ring group, etc.; R3 is a hydrogen atom, etc; R4 is a hydrogen atom; R5 is an oxepanyl group, etc.; R6 is a hydrogen atom.
化合物及/或其药理学上可接受的盐,其化学式表示为(I),具有PDE9抑制作用,因此预计可提高脑内cGMP浓度。PDE9抑制作用和cGMP的增加导致学习和记忆行为的改善,该化合物(I)具有作为治疗阿尔茨海默病认知功能障碍的潜在药物的可能性。
其中,R1为氢原子;R2为芳香环基团等;R3为氢原子等;R4为氢原子;R5为氧杂环戊基基团等;R6为氢原子。