The present invention relates to ethynyl compounds of formula
wherein X, Y, Z, and R
4
are as defined herein
or to a pharmaceutically acceptable salt or acid addition salt, to a racemic mixture, or to its corresponding enantiomer and/or optical isomer and/or stereoisomer thereof. Compounds of formula I are positive allosteric modulators (PAM) of the metabotropic glutamate receptor subtype 5 (mGluR5) and they are therefore useful for the treatment of diseases related to this receptor.
本发明涉及以下公式的
乙炔化合物:其中X,Y,Z和R4如本文所定义,或其药学上可接受的盐或酸加成盐,或其外消旋混合物,或其相应的对映体和/或光学异构体和/或立体异构体。公式I的化合物是代谢型谷
氨酸受体亚型5(mGluR5)的正向变构调节剂(P
AM),因此它们对于与该受体相关的疾病的治疗是有用的。