This invention offers isoxazole derivatives represented by the following formula (I)
in which R1 and R2 each stands for hydrogen, lower alkyl, amino and the like; R3 stands for substituted or unsubstituted aryl or hetero aryl; R4 stands for hydrogen or lower alkyl; R5 stands for substituted or unsubstituted phenyl, furyl and the like; and Y stands for -CH2-, -CO-, -O-, -NH- and the like,
or pharmaceutically acceptable salts thereof which exhibit excellent p38MAPkinase-inhibiting action with reduced side-effects, and are useful for treating such diseases as chronic rheumatoid arthritis, ulcerative colitis and the like.
本发明提供了由下式(I)表示的
异噁唑衍
生物
其中 R1 和 R2 分别代表
氢、低级烷基、
氨基等;R3 代表取代或未取代的芳基或杂芳基;R4 代表
氢或低级烷基;R5 代表取代或未取代的
苯基、
呋喃基等;Y 代表-
CH2-、-CO-、-O-、-NH-等、
或其药学上可接受的盐类,它们具有优异的 p38
MAPkinase 抑制作用,且副作用较小,可用于治疗慢性类风湿性关节炎、溃疡性结肠炎等疾病。