The present invention relates to ethynyl derivatives of formula I
wherein
R
1
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;所述卤原子选择自
氟或
氯;或者为在对映纯形式下的药用可接受的酸盐。已经发现,一般式I的化合物是代谢型谷
氨酸受体亚型5(mGluR5)的变构调节剂。