Benzopyrans as selective estrogen receptor beta agonists (SERBAs). Part 5: Combined A- and C-ring structure-activity relationship studies.Richardson, T.I., Dodge, J.A., Wang, Y., Durbin, J.D., Krishnan, V., Norman, B.H.
(2007) Bioorg Med Chem Lett 17: 5563-5566
- PubMed: 17804226
- DOI: https://doi.org/10.1016/j.bmcl.2007.08.009
- Primary Citation of Related Structures:
- PubMed Abstract:
Benzopyrans are selective estrogen receptor (ER) beta agonists (SERBAs), which bind the ER subtypes alpha and beta in opposite orientations. Here we describe the synthesis of a late stage intermediate that allowed us to combine A-ring and C-ring modifications and carry out simultaneous SAR studies at both positions. Modification of both positions proved additive, maintaining affinity and improving ERbeta selectivity up to 83-fold. An X-ray cocrystal structure confirms the previously observed binding mode in ERbeta.
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