申请人:SUNTORY LIMITED
公开号:EP0749967A1
公开(公告)日:1996-12-27
Disclosed are substituted benzothiazine derivatives represented by the following formula (I):
wherein the dashed line indicates the presence or absence of a bond; Z represents one of the following groups:
in which R1 and R2 individually represent alkyl, aralkyl or the like, R3 represents H, alkyl or the like, R4 represents H, aralkyl or the like, X1, X2 and X3 individually represent O or S, and G represents substituted or unsubstituted ethylene, trimethylene or the like; Q1 represents H, OH, halogen, alkoxy or the like; Q2 is similar to Q1 except for the exclusion of H; A represents alkylene, alkenylene or the like; Y represents CH, C= or N; when Y is CH, m stands for 0 or 1, n stands for 1 or 2, B represents O, S, carbonyl or the like, when Y is C=, m stands for 1, n stands for 1 or 2, B represents:
in which the double bond is linked to Y, R6 represents substituted or unsubstituted aryl or the like; when Y is N, m stands for 0 or 1, n stands for 2 or 3, B represents carbonyl, sulfonyl or the like, E1 and E2 individually represent H or lower alkyl; and D represents an aromatic hydrocarbon group or an aromatic heterocyclic group; and salts thereof.
The substituted benzothiazine derivatives (I) and their salts according to the present invention have strong serotonin-2 blocking action, have excellent selectivity to this action against α1 blocking action and have high safety. Accordingly, the present invention has made it possible to provide pharmaceuticals making use of antagonistic action against serotonin-2 receptors, for example, therapeutics for various circulatory diseases such as ishemic heart diseases, cerebrovascular disturbances and peripheral circulatory disturbances.
本发明公开了由下式(I)代表的取代苯并噻嗪衍生物:
其中虚线表示存在或不存在键;Z 代表下列基团之一:
其中 R1 和 R2 分别代表烷基、芳基或类似物,R3 代表 H、烷基或类似物,R4 代表 H、芳基或类似物,X1、X2 和 X3 分别代表 O 或 S,G 代表取代或未取代的乙烯、三亚甲基或类似物; Q1 代表 H、OH、卤素、烷氧基或类似物;Q2 与 Q1 类似,但不包括 H;A 代表亚烷基、烯基或类似物;Y 代表 CH、C= 或 N;当 Y 为 CH 时,m 代表 0 或 1,n 代表 1 或 2,B 代表 O、S、羰基或类似物,当 Y 为 C= 时,m 代表 1,n 代表 1 或 2,B 代表:
其中双键与 Y 连接,R6 代表取代或未取代的芳基或类似物;当 Y 为 N 时,m 代表 0 或 1,n 代表 2 或 3,B 代表羰基、磺酰基或类似物,E1 和 E2 分别代表 H 或低级烷基;以及 D 代表芳香烃基团或芳香杂环基团;及其盐。
根据本发明,取代的苯并噻嗪衍生物(I)及其盐类具有很强的 5-羟色胺-2(5-羟色胺-2)阻断作用,对α1 阻断作用具有很好的选择性,并且安全性高。因此,本发明可以提供利用 5-羟色胺-2受体拮抗作用的药物,例如治疗各种循环系统疾病,如缺血性心脏病、脑血管障碍和外周循环障碍的药物。