Compounds of formula (I) or a salt thereof are disclosed (I): wherein R1 is pyrazolyl substituted by two or three substituents independently selected from halogen, C1-4alkyl and haloC1-4alkyl; R2 is hydrogen or methyl; and R3 is quinolinyl, oxazolyl or phenyl, each of which is optionally substituted by one or two halogen, C1-4alkyl or haloC1-4alkyl. Processes for preparation and uses of the compounds in medicine, for example for the treatment of schizophrenia or drug dependency, are also disclosed.
公式(I)的化合物或其盐已被披露(I):其中R1是
嘧啶基,其上独立选择的两个或三个取代基分别来自卤素、C1-4烷基和卤代C1-4烷基;R2是氢或甲基;R3是
喹啉基、
噁唑基或苯基,每个基上可选择地取代一个或两个卤素、C1-4烷基或卤代C1-4烷基。还披露了制备这些化合物的方法以及在医学上的用途,例如用于治疗精神分裂症或药物依赖症。