申请人:KYORIN PHARMACEUTICAL CO., LTD.
公开号:EP1621538A1
公开(公告)日:2006-02-01
There are provided compounds represented by the following general formula (I):
[where R1 is 5-methylpyridin-2-yl, p-tolyl or mesityl, R2 is one of the following general formulas (II)-(IX):
(where R3 is C1-C4 alkyl, R4 is H or C1-C4 alkyl, R5 is H, 3-pyridylmethyl or 4-pyridylmethyl, and R6 is 2,4-dihydroxybenzyl, 3-pyridylmethyl or 4-pyridylmethyl),
or when R1 is mesityl, R2 is the following formula (X)],
and pharmaceutically acceptable salts thereof. The compounds exhibit pruritus-inhibiting action, and are useful for prevention or treatment of itching and pruritus caused by reaction against insect-inflicted wounds, reaction against environmental allergens, skin infections or external parasite infections, or caused to renal dialysis patient.
本发明提供了由以下通式 (I) 代表的化合物:
[其中 R1 为 5-甲基吡啶-2-基、对甲苯基或间甲基,R2 为以下通式 (II)-(IX) 之一:
(其中 R3 是 C1-C4 烷基,R4 是 H 或 C1-C4 烷基,R5 是 H、3-吡啶甲基或 4-吡啶甲基,R6 是 2,4-二羟基苄基、3-吡啶甲基或 4-吡啶甲基)、
或当 R1 为甲苯甲基时,R2 为下式 (X)]、
及其药学上可接受的盐类。这些化合物具有抑制瘙痒的作用,可用于预防或治疗由昆虫造成的伤口反应、环境过敏原反应、皮肤感染或体外寄生虫感染引起的瘙痒,或肾透析患者引起的瘙痒。