申请人:TOYAMA CHEMICAL CO., LTD.
公开号:EP0805149A1
公开(公告)日:1997-11-05
The present invention relates to a 2,3-diketopiperazine derivative or a salt thereof, which has inhibitory effect on platelet aggregation because of glycoprotein IIb/IIIa receptor antagonism and hence is useful as a prophylactic and therapeutic agent for diseases associated with platelet aggregation. General formula:
wherein R1 represents a protected or unprotected amidino group; R2 represents a hydrogen atom or a carboxyl-protecting group; A represents a substituted or unsubstituted lower alkylene group; B represents -O-, -CONH-, -NHCO- or -SO2NH-; Y represents a substituted or unsubstituted lower alkylene group; and the broken line represents a single bond or a double bond.
本发明涉及一种 2,3-二酮哌嗪衍生物或其盐,该衍生物因糖蛋白 IIb/IIIa 受体拮抗作用而对血小板聚集具有抑制作用,因此可用作与血小板聚集相关疾病的预防和治疗药物。通式
其中 R1 代表受保护或未受保护的脒基;R2 代表氢原子或羧基保护基团;A 代表取代或未取代的低级亚烷基;B 代表-O-、-CONH-、-NHCO-或-SO2NH-;Y 代表取代或未取代的低级亚烷基;断线代表单键或双键。