Abstract: The present invention relates to 7,8-dihydro-5H-1,6-naphthyridine derivatives of formula (I) The present compounds are positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4) for use in treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction. An exemplary compound is e.g. compound 1 Data on the activity of exemplary compounds in an mAChR M4 cell-based assay is provided. 1 5-methyl-6- (3-pyrrolidin- 1-1-7,8- dihydro-5H-1,6- naphtbyridin- 6-yl)pyridine- 3-carbonitrile 320.

Abstract: Disclosed herein are analogues of 6-(4-((2,3-dihydrobenzo[b][1,4]dioxin-6-yl)oxy)piperidin-1-yl)-[1,2,4]triazolo[4,3-b]pyridazine, i.e. 7-(4-((phenyl or pyridin-3-yl)oxy)piperidin-1-yl)-4H-pyrimido[1,2-b]pyridazin-4-one derivatives of formula (I) which may be useful as positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.

Abstract: Disclosed herein are substituted hexahydro-1H-cyclopenta[c]pyrrole compounds, which may be useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating disorders using the compounds and compositions.

Abstract: Disclosed herein are (6-(4-(trifluoromethyl)pyridin-3-yl)pyridazin-3-yl)octahydrocyclopenta[c]pyrrol-5-amine, (6-(4-(difluoromethyl)pyridin-3-yl)pyridazin-3-yl)octahydrocyclopenta[c]pyrrol-5-amine, and (6-(2-(trifluoromethyl)pyridin-3-yl)pyridazin-3-yl)octahydrocyclopenta[c]pyrrol-5-amine compounds, useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating disorders using the compounds and compositions.

Abstract: Indazole compounds which are useful as allosteric potentiators/positive allosteric modulators of the metabotropic glutamate receptor subtype 4 (mGluR4); synthetic methods for making the compounds; pharmaceutical compositions comprising the compounds; and methods of using the compounds, for example, in treating neurological and psychiatric disorders or other disease states associated with glutamate dysfunction.

Abstract: 5,6,7,8-Tetrahydro-1,6-naphthyridines substituted in the 6-position with pyrimido[1,2-b]pyridazin-4-one are positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4) and may have use in treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction.

Abstract: Disclosed herein are analogs of 4-(7,8-dihydro-1,6-naphthyridin-6(5H)-yl)quinazoline and 4-(7,8-dihydro-1,6-naphthyridin-6(5H)-yl)pyrido[2,3-d]pyrimidine, which may be useful as positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.

Abstract: Disclosed herein are tricyclic compounds, including pyrimido[4?,5?:4,5]thieno[2,3-c]pyridazine-8-amine, pyrido[3?,2?:4,5]thieno[3,2-d]pyrimidine-4-amine, pyrazino[2?,3?:4,5]thieno[3,2-d]pyrimidin-4-amine, pyrido[3?,2?:4,5]furo[3,2-d]pyrimidin-4-amine, and pyrimido[4?,5?:4,5]furo[2,3-c]pyridazin-8-amine compounds, which may be useful as positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.

Abstract: The present invention relates to 7,8-dihydro-5H-1,6-naphthyridine derivatives of formula (I) The present compounds are positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4) for use in treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction. An exemplary compound is e.g. example 1: 5,6-dimethyl-4-[3-(trifluoromethyl)-7,8-dihydro-5H-1,6-naphthyridin-6-yl]thieno[2,3-d]pyrimidine (compound 1): Data on the activity of exemplary compounds in an mAChR M4 cell-based assay is provided.

Abstract: The present invention relates to 6-([1,2,4]triazolo[4,3-b]pyridazin-6-yl)-7,8-dihydro-5H-1,6-naphthyridine derivatives, 6-(imidazo[1,2-b]pyridazin-6-yl)-7,8-dihydro-5H-1,6-naphthyridine derivatives or 6-(imidazo[1,5-b]pyridazin-6-yl)-7,8-dihydro-5H-1,6-naphthyridine derivatives of formula (I) The present compounds are positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4) for use in treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction. An exemplary compound is e.g. compound 1 Data on the activity of exemplary compounds in an mAChR M4 cell-based assay is provided.

Abstract: Disclosed are compounds of formula (I) wherein G1 is as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4) for use in the treatment of e.g. a neurodegenerative disorder, a movement disorder, or a brain disorder, such as e.g. Parkinson's disease, drug-induced Parkinsonism, dystonia, Tourette's syndrome, dyskinesias, schizophrenia, cognitive deficits associated with schizophrenia, excessive daytime sleepiness, attention deficit hyperactivity disorder (ADHD), Huntington's disease, chorea, cerebral palsy, and progressive supranuclear palsy. An exemplary compound is e.g. (2,5-difluoro-4-(6-(((3aR,5s,6aS)-2- ((tetrahydro-2H-pyran-4-yl)methyl)octahydrocyclopenta[c]pyrrol-5- yl)amino)pyridazin-3-yl)phenyl)(imino)(methyl)-?6-sulfanone (e.g. example 12; compound no. 7) Pharmacological data on the activity of the compounds in an mAChR M4 cell-based assay are provided (e.g. table 2) TABLE 2 Human M4 Cpd. No. IC50 (nM) Emin (%)* 1 13.4 4 2 39.6 2 3 18.

Abstract: The present invention relates to (6-((octahydrocyclopenta[c]pyrrol-5-yl)amino)pyridazin-3-yl)benzamide (R2b is —C(O)N(RA1)(RA2) and N-(6-((octahydrocyclopenta[c]pyrrol-5-yl)amino)pyridazin-3-yl) phenyl) carboxamide (R2b is —N(RB)C(O)RC) derivatives of formula (I) wherein (II) R2b is —C(O)N(RA1)(RA2) or —N(RB)C(O)RC as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4) for the treatment of neurodegenerative disorders, movement disorders or brain disorders, such as e.g. Parkinson's disease, drug-induced Parkinsonism, dystonia, Tourette's syndrome, dyskinesias, schizophrenia, cognitive deficits associated with schizophrenia, excessive daytime sleepiness, attention deficit hyperactivity disorder (ADHD), Huntington's disease, chorea, cerebral palsy, and progressive supranuclear palsy. An exemplary compound is e.g. N-(4-(6-(((3aR,5s,6aS)-2-(2-fluorobenzyl)octahydrocyclopenta[c]pyrrol-5-yl)amino)pyridazin-3-yl) phenyl)acetamide (A1) (III).

Abstract: Described are 6-aryl [1,2,4]triazolo[4,3-a]pyridin-3(2H)-ones as negative allosteric modulators of metabotropic glutamate receptor 2 (mGlu2), pharmaceutical compositions including the compounds, and methods of using the compounds and compositions for treating depression, anxiety, obsessive-compulsive disorder, cognitive disorders, Alzheimer's disease, or autism spectrum disorders in a subject.

Abstract: Described are 6-aryl isoindolin-1-ones as negative allosteric modulators of metabotropic glutamate receptor 2 (mGlu2), pharmaceutical compositions including the compounds, and methods of using the compounds and compositions for treating depression, anxiety, obsessive-compulsive disorder, cognitive disorders, Alzheimer's disease, or autism spectrum disorders in a subject.

Abstract: Disclosed herein are (6-(2H-indazol-5-yl)pyridazin-3-yl)octahydrocyclopenta[c]pyrrol-5-amine compounds, useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating disorders using the compounds and compositions.

Abstract: Arylsulfonamides of 4-heteroaryl-cyclohexyls, and their derivatives, are competitive and non-competitive inhibitors of the muscarinic acetylcholine receptor M5 (mAChR M5) and have utility in the treatment of psychiatric disorders such as substance-related misuse, substance-related disorder relapse, anxiety, depression, and psychosis.

Abstract: Disclosed herein are substituted hexahydro-1H-cyclopenta[c]pyrrole compounds, which may be useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating disorders using the compounds and compositions.

Abstract: Disclosed herein are compounds of formula (III) useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurodegenerative disorders using the compounds and compositions.

Abstract: Disclosed herein are substituted hexahydro-1H-cyclopenta[c]pyrrole compounds, which may be useful as antagonists of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating disorders using the compounds and compositions.

Abstract: Disclosed herein are analogues of 6-(4-((2,3-dihydrobenzo[b][1,4]dioxin-6-yl)oxy)piperidin-1 -yl)-[1,2,4]triazolo[4,3-b]pyridazine of formula (Ib), which may be useful as positive allosteric modulators of the muscarinic acetylcholine receptor M4 (mAChR M4). Also disclosed herein are methods of making the compounds, pharmaceutical compositions comprising the compounds, and methods of treating neurological and psychiatric disorders associated with muscarinic acetylcholine receptor dysfunction using the compounds and compositions.