The present invention relates to ethynyl derivatives of formula (I) wherein R1 is phenyl, which is optionally substituted by 1-2 halogen atoms; selected from fluorine or chlorine; or to a pharmaceutically acceptable acid addition salt in enantiomerically pure form. It has been found that the compounds of general formula (I) are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5).
本发明涉及公式(I)的
乙炔衍
生物,其中R1为
苯基,可以选择性地被1-2个卤原子取代;所述卤原子选自
氟或
氯;或以对映纯形式的药用可接受酸盐。已发现一般公式(I)的化合物是代谢型谷
氨酸受体亚型5(mGluR5)的变构调节剂。