Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 22, Issue 2, Pages 977-979Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2011.12.003
Keywords
Heteroarylvinyl estradiols; Estrogen receptor-alpha ligand binding domain; Competitive binding assay; Alkaline phosphatase induction; Relative binding affinity; Relative stimulatory activity
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Funding
- National Institutes of Health [PHS 1R01 CA81049, PHS 1R01 CA 37799, R21MH082252]
- U.S. Army [DAMD 17-00-1-00384, W81HW0410544]
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A series of 17 alpha-(heteroaryl)vinyi estradiols was prepared to evaluate the influence of heteroatom on the affinity and efficacy of estrogenic ligands for the estrogen receptor-alpha ligand binding domain (ER alpha-LBD). The products demonstrated reduced binding affinity compared to the parent 17 alpha-E-phenylvinyl estradiol, but the binding was relatively independent of the heteroatom. The greatest influence of the heteroatom was evident in the efficacy of the compounds as the thienyl derivatives 2f,g were more potent than either the pyridyl 2b-d or pyrimidinyl 2e analogs. The results suggest that a subtle interplay of interactions between the ligands and the receptor influences the biological response. (C) 2011 Elsevier Ltd. All rights reserved.
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