Potential Anxiolytic Agents. Part 4. Novel Orally-Active N5-Substituted Pyrido[1,2-a]benzimidazoles with High GABA-A Receptor Affinity.
2010
Abstract A series of pyrido[1,2- a ]benzimidazoles (PBIs) with substitution on the N 5 -nitrogen has been synthesized and found to possess high affinity for the benzodiazepine (BZD) site on the GABA-A receptor. The compounds evaluated include those bearing a heteroalkyl group and heterocyclic rings. The most promising of these compounds is ethoxymethyl analogue 24 , which has an IC 50 of 0.1 nM for the BZD site on the GABA-A receptor and has been advanced to human clinical trials.
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