申请人:BANYU PHARMACEUTICAL CO., LTD.
公开号:EP1892241A1
公开(公告)日:2008-02-27
Disclosed is a substance having an antagonistic effect on the binding of histamine to a histamine H3 receptor or an inhibitory effect on the activity which a histamine H3 receptor constantly exhibits. A compound represented by the formula (I) or a pharmaceutically acceptable salt thereof; (I)
wherein R1 represents a phenyl group which may be substituted or the like and R2 represents a cyano group which may be substituted or the like, or R1 and R2 together form an aliphatic heterocylic ring which may be substituted; R3 represents a group represented by the formula (II-1) below;
and all of X1 to X4 represent a carbon atom or the like: (II-1) where R4 and R5 represent a lower alkyl group or the like; and ml represents an integer of 2 to 4.
本发明公开了一种对组胺与组胺 H3 受体的结合具有拮抗作用或对组胺 H3 受体持续表现出的活性具有抑制作用的物质。由式(I)代表的化合物或其药学上可接受的盐; (I)
其中 R1 代表可被取代的苯基或类似基团,R2 代表可被取代的氰基或类似基团,或 R1 和 R2 共同形成可被取代的脂族杂环;R3 代表下式(II-1)所代表的基团;
且所有 X1 至 X4 均代表碳原子或类似物:(II-1) 其中 R4 和 R5 代表低级烷基或类似基团;ml 代表 2 至 4 的整数。