申请人:Kyowa Hakko Kogyo Co., Ltd.
公开号:EP0884318A1
公开(公告)日:1998-12-16
The present invention provides condensed purine derivatives or pharmacologically acceptable salts thereof exhibiting adenosine A3 acceptor antagonising activity , and having an antiasthmatic action, a bronchodilator action, an antiantiitching action, etc., and represented by the following formula (I):
(wherein R1 represents substituted or unsubstituted aryl or a substituted or unsubstituted aromatic heterocyclic group; R2 represents hydrogen, lower alkyl, alicyclic alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, or a substituted or unsubstituted aromatic heterocyclic group; R3 represents hydrogen, lower alkyl, or substituted or unsubstituted aralkyl; X1 and X2 are the same or different and each represents hydrogen, lower alkyl, substituted or unsubstituted aralkyl, or substituted or unsubstituted aryl; and n represents an integer of 0 to 3).
本发明提供了缩合嘌呤衍生物或其药理上可接受的盐,它们具有腺苷A3受体拮抗活性,并具有抗哮喘作用、支气管扩张作用、止痒作用等,由下式(I)表示:
(其中 R1 代表取代或未取代的芳基或取代或未取代的芳香杂环基团;R2 代表氢、低级烷基、脂环烷基、取代或未取代的芳烷基、取代或未取代的芳基或取代或未取代的芳香杂环基团;R3 代表氢、低级烷基或取代或未取代的芳基; X1 和 X2 相同或不同,各自代表氢、低级烷基、取代或未取代的芳基或取代或未取代的芳基; n 代表 0 至 3 的整数。)