This invention offers isoxazole derivatives represented by the following formula (I)
in which R
1
and R
2
each stands for hydrogen, lower alkyl, amino and the like; R
3
stands for substituted or unsubstituted aryl or hetero aryl; R
4
stands for hydrogen or lower alkyl; R
5
stands for substituted or unsubstituted phenyl, furyl and the like; and Y stands for —CH
2
—, —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.
该发明提供了以下式(I)所表示的异唑啉衍
生物,其中R1和R2分别代表
氢,低
碳基,
氨基等; R3代表取代或未取代的芳基或杂环芳基; R4代表
氢或低
碳基; 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,具有出色的p38
MAPkinase抑制作用,副作用减少,并且用于治疗慢性类风湿性关节炎,溃疡性结肠炎等疾病。