Discovery of biological evaluation of pyrazole/imidazole amides as mGlu5 receptor negative allosteric modulators

Development of SAR in a 5-aryl-3-acylpyridinyl-pyrazoles and 1-aryl-4-acylpyridinylimidazoles series of mGlu5 receptor negative allosteric modulators (mGluR5 NAMs) using a functional cell-based assay is described in this Letter. Analysis of the Ligand-lipophilic efficiency (LipE) of compounds provided new insight for the design of potent mGluR5 negative allosteric modulators with anti-depressant activities.