Benzimidazoles as Potent and Orally Active mGlu5 Receptor Antagonists with an Improved PK Profile

[摘要]：A focused chemical optimization effort of a compound 1 based on metabolite elucidation is described, resulting in 15i, a highly potent and selective mGlu5 receptor antagonist with an improved pharmacokinetic profile compared to 1. Characterization of 15i in vivo in the fear potentiated startle (FPS) paradigm revealed a robust reduction of conditioned fear behavior. This effect nicely correlates with the rat brain pharmacokinetics.

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