The present invention is directed to pyrrolopyridine compounds of formula (I) or their pharmaceutically acceptable salts, which may be suitable for imaging tau aggregates, b-sheet aggregates, beta-amyloid aggregates or alpha-synuclein aggregates, and hence are useful in binding and imaging tau aggregates in Alzheimer's patients. More specifically, this invention relates to a method of using the compounds of this invention as tracers in positron emission tomography (PET) imaging to study tau deposits in brain in vivo to allow diagnosis of Alzheimer's disease and other neurodegenerative diseases characterized by tau pathology. The invention further relates to a method of measuring clinical efficacy of therapeutic agents for Alzheimer's disease and other neurodegenerative diseases characterized by tau pathology.
本发明涉及式(I)的
吡咯吡啶化合物或其药学上可接受的盐,可能适用于成像tau聚集体、β-折叠聚集体、β-淀粉样聚集体或α-突触核聚集体,因此有助于在阿尔茨海默病患者中结合和成像tau聚集体。更具体地,本发明涉及使用本发明化合物作为正电子发射断层扫描(PET)成像中的示踪剂,以研究体内脑中的tau沉积物,从而诊断阿尔茨海默病和其他以tau病理学为特征的神经退行性疾病。本发明还涉及一种测量治疗阿尔茨海默病和其他以tau病理学为特征的神经退行性疾病的临床疗效的方法。