A heterocyclic compound represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom, an alkyl group, an aryl group which may be substituted with one or more substituents selected from the group consisting of a halogen atom, an alkoxy group, an alkyl group and a trihalogenomethyl group; .lambda. represents 0 or 1; ring A represents a 6 membered heterocyclic ring containing the nitrogen atom shared with the triazine ring and which may contain one or more double bonds; Y represents a substituted or unsubstituted alkylene group having 1 to 15 carbon atoms; and Q represents a group represented by formula (II): ##STR2## wherein R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are represented by substituents disclosed herein; or salt thereof, and intermediates therefor are described. The compound of formula (I) or salt thereof exhibit selective serotonin 2-receptor antagonistic activity and are useful for the prevention or treatment of circulatory diseases, e.g., ischemic heart diseases, cerebral vessel disturbances, and peripheral circulation disturbances.
一种由式(I)表示的
杂环化合物:##
STR1## 其中R.sup.1表示
氢原子,烷基,芳基,可以用来替代一个或多个取代基的芳基,所述取代基选择自卤原子,烷
氧基,烷基和三卤
甲基;λ表示0或1;环A表示一个含有与
三嗪环共享的
氮原子的6元杂环环,该环可以包含一个或多个双键;Y表示取代或未取代的
碳数为1至15的烷基;Q表示由式(II)表示的基团:##
STR2## 其中R.sup.2,R.sup.3,R.sup.4和R.sup.5由此处披露的取代基团表示;或其盐和
中间体。式(I)或其盐具有选择性5-羟
色胺2受体拮抗活性,并且对于预防或治疗循环系统疾病,例如缺血性心脏病,脑血管障碍和周围循环障碍是有用的。