A class of 3-phenylimidazo[1,2-&agr;]pyrimidine derivatives, substituted at the meta position of the phenyl ring by an optionally substituted aryl or heteroaryl group which is directly attached or bridged by an oxygen atom or a —NH— linkage, and further substituted on the phenyl ring by alkyl, trifluoromethyl, alkoxy or one or two halogen atoms, especially fluoro, are selective ligands for GABA
A
receptors, in particular having good affinity for the &agr;2 and/or &agr;3 and/or &agr;5 subunit thereof, and are accordingly of benefit in the treatment and/or prevention of adverse conditions of the central nervous system, including anxiety, convulsions and cognitive disorders.
一类3-苯基
咪唑[1,2-&agr;]
嘧啶衍
生物,苯环的间位被取代,取代基可以是直接连接或通过氧原子或-NH-键桥接的取代芳基或杂环芳基,苯环上进一步被取代为烷基,三
氟甲基,烷氧基或一个或两个卤素原子,特别是
氟,是
GABAA受体的选择性
配体,特别是对其中的&agr;2和/或&agr;3和/或&agr;5亚基具有良好的亲和力,因此对于治疗和/或预防中枢神经系统的不良症状,包括焦虑,惊厥和认知障碍具有益处。