A New Class of Diamine-Based Human Histamine H₃ Receptor Antagonists: 4-(Aminoalkoxy)benzylamines

Abstract

4-(Aminoalkoxy)benzylamines were prepared and screened for in vitro activity at the human histamine H(3) receptor. Some members of this series exhibited subnanomolar binding affinities. Analogues in which one nitrogen atom was replaced with a methine group showed greatly reduced binding affinities. Six members of this series were found to be antagonists in a cell-based model of human histamine H(3) receptor activation. One member of this series, 1-[4-(3-piperidin-1-ylpropoxy)benzyl]piperidine (7b), was found to be a selective and potent human H(3) receptor antagonist.