The present invention relates to ethynyl derivatives of formula I
wherein
R
1
is hydrogen or halogen;
R
2
is C
1-3
-alkyl or —(CH
2
)
n
—O—CH
3
;
n is 2 or 3;
m is 1 or 2;
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.
It has been found that the compounds of general formula I are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5) with improved properties for the treatment of schizophrenia, cognitive diseases, fragile X syndrome or autism.
本发明涉及公式I的
乙炔衍
生物,其中R1是
氢或卤素;R2是C1-3-烷基或—(
CH2)n—O—
CH3;n为2或3;m为1或2;或其药学上可接受的酸盐,或其相应的外消旋混合物,或其对应的对映体和/或光学异构体和/或立体异构体。已发现通用公式I的化合物是代谢型谷
氨酸受体亚型5(mGluR5)的变构调节剂,具有改善的特性,可用于治疗精神分裂症、认知疾病、脆性X综合征或自闭症。