Structural Evolutions of Salicylaldoximes as Selective Agonists for Estrogen Receptor β
The bioisosteric replacement of the phenol ring, a signature functional group of most estrogen receptor (ER) ligands, with a hydrogen-bonded pseudocyclic ring, led to the development of a novel class of nonsteroidal ER-ligands based on a salicylaldoxime template. A series of structural modifications...
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Veröffentlicht in: | Journal of medicinal chemistry 2009-02, Vol.52 (3), p.858-867 |
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Hauptverfasser: | , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The bioisosteric replacement of the phenol ring, a signature functional group of most estrogen receptor (ER) ligands, with a hydrogen-bonded pseudocyclic ring, led to the development of a novel class of nonsteroidal ER-ligands based on a salicylaldoxime template. A series of structural modifications were applied to selected molecules belonging to the monoaryl-salicylaldoxime chemical class in an attempt to improve further their ERβ-selective receptor affinity and agonist properties. Among several modifications, the best results were obtained by the simultaneous introduction of a meta-fluorine atom into the para-hydroxyphenyl substituent present in the 4-position of salicylaldoxime, together with the insertion of a chloro group in the 3-position of the central scaffold. The resulting compound showed the best affinity (K i = 7.1 nM) and selectivity for ERβ over ERα. Moreover, in transcription assays, it proved to be a selective and potent ERβ-full agonist with an EC50 of 4.8 nM. |
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ISSN: | 0022-2623 1520-4804 |
DOI: | 10.1021/jm801458t |