The present invention relates to bifeprunox derivatives of the formula (I) wherein R1 is one substituent selected from 3-OH, 4-OH, 3-OSO3H and 4-OSO3H; R2 is H; or an N-oxide or a pharmaceutically acceptable salt, a solvate or hydrate thereof, which are potent ligands for the dopamine D2 receptor, exhibiting strong partial dopamine D2 agonistic effects with a percentage agonism significantly higher than bifeprunox. The compounds of the invention may be used in the treatment, alleviation or prevention of dopamine D2 receptor mediated diseases and conditions requiring dopamine D2 agonistic effects.
本发明涉及公式(I)的bifeprunox衍
生物,其中R1是从3-OH、4-OH、3-OSO3H和4-OSO3H中选择的一个取代基;R2是H;或者是N-氧化物或药学上可接受的盐、溶剂或
水合物,它们是
多巴胺D2受体的有效
配体,展示出强烈的部分
多巴胺D2激动作用,其激动百分比显著高于bifeprunox。本发明的化合物可用于治疗、缓解或预防
多巴胺D2受体介导的疾病和需要
多巴胺D2激动作用的情况。