The present invention relates to an aminopyridine compound represented by the following general formula (I) or a salt thereof and an Syk inhibitor containing the compound or a salt thereof as an active ingredient. Here, X1, X2, X3, Z, Y1, Y2 represent a carbon atom or a nitrogen atom, R, R1, R5, R6 represent a hydrogen atom, an'alkyl group, etc., and R7 represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, -CpH2(p-1) (Ra1) (Ra2) -O-Ra3, -C (=O) -Rd1, a 5 - or 6-membered saturated heterocyclic group, an aromatic heterocyclic group, -N(Rh1)(Rh2), etc. The aminopyridine compound of the present invention has not only high Syk inhibitory activity but also properties to selectively inhibit Syk.
本发明涉及由以下通式(I)代表的
氨基吡啶化合物或其盐,以及含有该化合物或其盐作为活性成分的Syk
抑制剂。这里,X1、X2、X3、Z、Y1、Y2 代表
碳原子或
氮原子,R、R1、R5、R6 代表
氢原子、烷基等、R7代表
氢原子、卤素原子、硝基、
氰基、-CpH2(p-1) (Ra1) (Ra2) -O-Ra3, -C (=O) -Rd1, 5-或 6-元饱和杂环基团、芳香杂环基团、-N(Rh1)(Rh2)等。本发明的
氨基吡啶化合物不仅具有很高的 Syk 抑制活性,而且还具有选择性抑制 Syk 的特性。