申请人:Clino Ltd.
公开号:EP2634177A1
公开(公告)日:2013-09-04
An object of the present invention is to provide a probe for imaging a β-sheet structure protein which can be used for the diagnosis of conformational diseases, particularly disease (tauopathy) having a cardinal symptom such as intracerebral accumulation of tau protein, for example, Alzheimer's disease. Another object of the present invention is to provide a compound which is highly specific to tau and can image tau with satisfactory sensitivity, and also has high brain transition, low or non-recognized bone-seeking properties and low or non-recognized toxicity.
According to the present invention, the above problems are solved by providing a compound of a formula I (wherein A, R1, R2, R3, R4, R5, R6, Ra and Rb are as defined in the present description) or a pharmaceutically acceptable salt or solvate thereof.
本发明的一个目的是提供一种用于β片状结构蛋白成像的探针,该探针可用于构象疾病的诊断,特别是具有脑内tau蛋白聚集等主要症状的疾病(tauopathy),例如阿尔茨海默病。本发明的另一个目的是提供一种化合物,该化合物对 tau 蛋白具有高度特异性,能以令人满意的灵敏度对 tau 蛋白进行成像,同时还具有较高的脑转化率、较低或未识别的骨寻觅特性以及较低或未识别的毒性。
根据本发明,通过提供一种式 I 的化合物(其中 A、R1、R2、R3、R4、R5、R6、Ra 和 Rb 如本说明书中所定义)或其药学上可接受的盐或溶液来解决上述问题。