Preparation of imidazoles as potent calcitonin gene-related peptide (CGRP) antagonists
- PMID: 23993336
- DOI: 10.1016/j.bmcl.2013.08.031
Preparation of imidazoles as potent calcitonin gene-related peptide (CGRP) antagonists
Abstract
Several new potent CGRP receptor antagonists have been prepared in which the amide bond of lead compound 1 has been replaced by bioisosteric imidazole moieties. Substitution at N-1 of the imidazole was optimized to afford compounds with comparable potency to that of lead 1. Conformational restraint of the imidazole to form tetrahydroimidazo[1,5-a]pyrazine 43 gave substantially improved permeability.
Keywords: CGRP; CGRP receptor antagonists; Imidazoles; Migraine; Migraineurs.
Copyright © 2013 Elsevier Ltd. All rights reserved.
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