The azetidinone LY307174 (1) was identified as a screening lead for the vasopressin V1a receptor (IC50 45 nM at the human V1a receptor) based on molecular similarity to ketoconazole (2), a known antagonist of the luteinizing hormone releasing hormone receptor. Structure-activity relationships for the series were explored to optimize receptor affinity and pharmacokinetic properties, resulting in compounds with K-i values < 1 nM and brain levels after oral dosing similar to 100-fold higher than receptor affinities.[GRAPHICS](c) 2006 Elsevier Ltd. All rights reserved.
The azetidinone LY307174 (1) was identified as a screening lead for the vasopressin V1a receptor (IC50 45 nM at the human V1a receptor) based on molecular similarity to ketoconazole (2), a known antagonist of the luteinizing hormone releasing hormone receptor. Structure-activity relationships for the series were explored to optimize receptor affinity and pharmacokinetic properties, resulting in compounds with K-i values < 1 nM and brain levels after oral dosing similar to 100-fold higher than receptor affinities.[GRAPHICS](c) 2006 Elsevier Ltd. All rights reserved.