abstract |
The present invention relates to pyrrolopyridine or pyrazolopyridine derivatives. In particular, the present invention relates to compounds of formula I, or to pharmaceutically acceptable acid addition salts, racemic mixtures thereof or corresponding enantiomers and/or optical isomers thereof. The compounds of the present invention are positive allosteric modulators (PAMs) of muscarinic M1 receptors and are therefore useful in the treatment of diseases mediated by muscarinic M1 receptors, such as Alzheimer's disease, cognitive impairment, psychiatric Schizophrenia, pain, or sleep disturbance. |