ARYLETHYNYL DERIVATIVES

摘要

The present invention relates to ethynyl compounds of formula I-C1 wherein R1, R2, R2′, R3, R3′, R6, U, V and W are as defined herein and to a pharmaceutically acceptable acid addition salts, to a racemic mixtures, or to its corresponding enantiomers and/or optical isomers and/or stereoisomers thereof, which are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5).