Introduction of selected amine containing side chains into the 3-position of N',2-diphenylquinoline-4-carbohydrazide based NK3 antagonists abolishes unwanted hPXR activation. Introduction of a fluorine at the 8-position is necessary to minimize unwanted hI(Kr) affinity and a piperazine N-tert-butyl group is necessary for metabolic stability. The lead compound (8m) occupies receptors within the CNS following oral dosing (Occ(90) 7 mg/kg po; plasma Occ(90) 0.4 microM) and has good selectivity and excellent PK properties.
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| http://dx.doi.org/10.1016/j.bmcl.2006.08.085 | DOI Listing |
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