The present invention relates to ethynyl derivatives of formula I
X, G, R
1
, R
2
, R
3
, R
3′
, R
4
, R
4′
, R
5
, R
6
, R
6′
, m, and n are as defined herein or to a pharmaceutically acceptable 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). They can be used for the treatment of schizophrenia or cognitive disorders.
本发明涉及公式IX的
乙炔衍
生物,其中G、R1、R2、R3、R3'、R4、R4'、R5、R6、R6'、m和n如本文所定义,或者涉及其药学上可接受的酸加合物盐,或者其相应的外消旋体和/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)。它们可用于治疗精神分裂症或认知障碍。