申请人:Eisai R&D Management Co., Ltd.
公开号:US20130143907A1
公开(公告)日:2013-06-06
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 applicability as a therapeutic agent for cognitive dysfunctions in Alzheimer's disease.
wherein R
1
is a hydrogen atom; R
2
is an aromatic ring group, etc.; R
3
is a hydrogen atom, etc; R
4
is a hydrogen atom; R
5
is an oxepanyl group, etc.; R
6
is a hydrogen atom.
由以下化学式(I)表示的化合物和/或药理学上可接受的盐具有PDE9抑制作用,因此预期将提高脑内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,化合物(I)具有作为治疗代理人用于阿尔茨海默病认知功能障碍的适用性。其中R1是氢原子;R2是芳香环基团等;R3是氢原子等;R4是氢原子;R5是氧杂环丙基团等;R6是氢原子。