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Polygraphic Recording Procedure for Measuring Sleep in Mice
Published on: January 25, 2016
Substituted pyrrolidin-2-ones: Centrally acting orexin receptor antagonists promoting sleep. Part 2
Thierry Sifferlen1, Amandine Boller1, Audrey Chardonneau1
1Actelion Pharmaceuticals Ltd, Drug Discovery and Preclinical Research & Development, Gewerbestrasse 16, CH-4123 Allschwil, Switzerland.
Abstract:
Starting from advanced pyrrolidin-2-one lead compounds, this novel series of small-molecule orexin receptor antagonists was further optimized by fine-tuning of the C-3 substitution at the γ-lactam ring. We discuss our design to align in vitro potency with metabolic stability and improved physicochemical/pharmacokinetic properties while avoiding P-glycoprotein-mediated efflux. These investigations led to the identification of the orally active 3-hydroxypyrrolidin-2-one 46, a potent and selective orexin-2 receptor antagonist, that achieved good brain exposure and promoted physiological sleep in rats.
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