The present invention provides compounds of Formula (I): and pharmaceutically acceptable salts thereof wherein the variables R1, R2, R3, R4, R5, a and A are as defined herein; processes for the preparation of; intermediates used in the preparation of; and compositions containing such compounds or salts, and their uses for treating D3-mediated (or D3-associated) disorders including, e.g., substance addiction, substance abuse, schizophrenia (e.g., its cognitive symptoms), cognitive impairment (e.g., cognitive impairment associated with schizophrenia, AD or PD), Parkinson's disease, mania, anxiety, impulse control disorders, sexual disorders and depression.
本发明提供了Formula (I)的化合物及其药学上可接受的盐,其中变量R1、R2、R3、R4、R5、a和A如本文所定义;制备方法;制备中使用的中间体;以及含有这种化合物或盐的组合物,以及它们用于治疗D3介导的(或与D3相关的)疾病,包括物质成瘾、物质滥用、精神分裂症(例如其认知症状)、认知障碍(例如与精神分裂症、阿尔茨海默病或帕
金森病相关的认知障碍)、帕
金森病、狂躁症、焦虑、冲动控制障碍、性功能障碍和抑郁症等疾病的用途。