The present invention relates to phenylethynyl derivatives of formula (I) wherein R1 is hydrogen, halogen, lower alkyl or lower alkyl substituted by halogen; R2 is hydrogen, lower alkyl, =O, lower alkoxy, phenyl, hydroxy or lower alkyl substituted by hydroxy; X is N, CF or CH; L is -NR3-, -NHC(R3)2-, -O-, -OC(R3)2-, -CR4R4'-; R3 is hydrogen or lower alkyl; R4/R4' are independently from each other hydrogen or lower alkyl; cyc is cycloalkyl or heterocycloalkyl, or is a non-aromatic bicycle selected from 7-oxa- bicyclo[2.2.1]hept-1-yl or bicyclo[2.2.1]hept-1-yl; n is 1, 2 or 3; 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 now surprisingly been found that the compounds of general formula I are positive allosteric modulators (PAM) of the metabotropic glutamate receptor subtype 5 (mGluR5). They are useful for the treatment of schizophrenia or cognitive diseases.
本发明涉及公式(I)的
苯乙炔基衍
生物,其中R1为
氢、卤素、较低烷基或受卤素取代的较低烷基;R2为
氢、较低烷基、=O、较低烷
氧基、
苯基、羟基或受羟基取代的较低烷基;X为N、CF或CH;L为-NR3-、-NHC(R3)2-、-O-、-OC(R3)2-、-CR4R4'-;R3为
氢或较低烷基;R4/R4'分别为
氢或较低烷基;cyc为
环烷基或杂
环烷基,或者为从7-
氧代-双环[2.2.1]庚-1-基或双环[2.2.1]庚-1-基中选择的非芳香族双环;n为1、2或3;或者为药学上可接受的酸盐,或为外消旋混合物,或为其对应的对映体和/或光学异构体和/或立体异构体。令人惊讶的是,已经发现通式I化合物是代谢型谷
氨酸受体亚型5(mGluR5)的阳性变构调节剂(P
AM)。它们对于治疗精神分裂症或认知疾病非常有用。