Bradykinin B1 receptor antagonists:: An α-hydroxy amide with an improved metabolism profile

A series of carbo-and heterocyclic alpha-hydroxy amide-derived bradykinin B(1) antagonists were prepared and evaluated. A 4,4-difluorocyclohexyl alpha-hydroxy amide was incorporated along with a 2-methyl tetrazole in lieu of an oxadiazole to afford a suitable compound with good pharmacokinetic properties, CNS penetration, and clearance by multiple metabolic pathways. (C) 2008 Elsevier Ltd. All rights reserved.