申请人:Eisai R&D Management Co., Ltd.
公开号:EP2769980A1
公开(公告)日:2014-08-27
A compound 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.
由式(I)代表的化合物或其药理上可接受的盐具有 PDE9 抑制作用,因此脑内 cGMP 浓度可望升高。PDE9 抑制作用和 cGMP 的增加导致学习和记忆行为的改善,因此化合物 (I) 有可能用作阿尔茨海默病认知功能障碍的治疗剂。
其中 R1 是氢原子;R2 是芳香环基等;R3 是氢原子等;R4 是氢原子;R5 是氧杂环烷基等;R6 是氢原子。