A problem of the present invention is to provide a new compound which has NK1 receptor antagonist activity ,whose CYP3A4 inhibitory activity is reduced compared to aprepitant, and which are useful for the prevention or treatment of cancer-chemotherapy-induced nausea and vomiting. That is, the present invention relates to cyclohexyl pyridine derivatives represented by the following formula (I) or a pharmaceutically acceptable salt thereof. wherein, ring A is 4-fluoro-2-methylphenyl or the like; X is a hydrogen atom or the like; R1 is carboxymethyl or the like; R2 is alkyl or the like; Y is 0-2 or the like; U is-N(CH3)COC(CH3)2-3,5-bistrifluoromethylphenyl or the like.
本发明的一个问题是提供一种新的化合物,该化合物具有NK1受体拮抗剂活性,其CYP3A4抑制活性与
阿瑞匹坦相比有所降低,可用于预防或治疗癌症化疗引起的恶心和呕吐。也就是说,本发明涉及下式(I)所代表的环己基
吡啶衍生物或其药学上可接受的盐。 其中,环 A 是 4-
氟-2-甲基苯基或类似物;X 是氢原子或类似物;R1 是羧甲基或类似物;R2 是烷基或类似物;Y 是 0-2 或类似物;U 是-N(
CH3)COC( )2-3,5-双三
氟甲基苯基或类似物。