申请人:Nihon Nohyaku Co., Ltd.
公开号:US05604226A1
公开(公告)日:1997-02-18
Pyridazinone derivatives of formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group which may be substituted with an aliphatic cyclic amino group optionally containing a hetero atom in the ring thereof; each of X.sup.1 and X.sup.2 independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a cyano group, a nitro group or a group shown by --CO--NR.sup.2 R.sup.3 (wherein each of R.sup.2 and R.sup.3 independently represents an alkyl group having 1 to 6 carbon atoms); Y represents a halogen atom; Z represents an alkoxy group having 1 to 6 carbon atoms; l represents 0 or an integer of 1 to 3; A represents CH or N; m represents 0 or an integer of 1 or 2; and n represents an integer of 1 to 8, exhibit a platelet aggregation inhibiting activity and are useful for the treatment of circulatory disorders such as cerebral infarction.
公式(I)的吡啶二酮衍生物:##STR1##其中 R.sup.1 代表氢原子或甲基基团,其可以被取代为含有环状脂肪族氨基团的脂肪族,该环状脂肪族氨基团可选地在其环中含有一个杂原子; 每个 X.sup.1 和 X.sup.2 独立地代表氢原子,卤素原子,具有1至6个碳原子的烷基,具有1至6个碳原子的烷氧基,氰基,硝基或由--CO--NR.sup.2 R.sup.3(其中每个 R.sup.2 和 R.sup.3 独立地代表具有1至6个碳原子的烷基)表示的基团; Y代表卤素原子; Z代表具有1至6个碳原子的烷氧基; l代表0或1至3的整数; A代表CH或N; m代表0或1至2的整数; n代表1至8的整数,具有抑制血小板聚集的活性,可用于治疗循环障碍,如脑梗塞。