The present invention relates to ethynyl derivatives of formula (I) wherein • R is phenyl, 3-fluorophenyl, 4-fluorophenyl or 2,5-di-fluorophenyl; • or to a pharmaceutically acceptable acid addition salt, in enantiomerically pure form with the absolute configuration as shown in formula (I). It has now surprisingly been found that the compounds of general formula I are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5) whic are useful for he treatment of schizophrenia, cognitive disorders, fragile X sydrome or autism and which show advantageous biochemical-, physicochemical- and pharmacodynamic- properties compared to compounds of prior art.
本发明涉及公式(I)的
乙炔衍
生物,其中:•R是
苯基、3-
氟苯基、4-
氟苯基或2,5-二
氟苯基;•或以绝对构型为公式(I)所示的对映体纯形式的药学上可接受的酸加盐。现已惊奇地发现,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,对治疗精神分裂症、认知障碍、脆性X综合症或自闭症有用,并且与先前技术的化合物相比,具有优越的生化、物理
化学和药动学性质。