Synthesis and antihormonal properties of novel 11β-benzoxazole-substituted steroids
摘要:
Early studies led to the identification of 11 beta-aryl-4',5'-dihydrospiro[estra-4,9-diene-17 beta,4'-oxazole] analogs with potent and more selective antiprogestational activity compared to antiglucocorticoid activity than mifepristone. In the present study, we replaced the 4'-dimethylaminophenyl group of mifepristone with the benzoxazol group to give 5a-d. We also prepared the 17 beta-formamido analogs 6a,b using a new synthetic strategy via the intermediate epoxide 21. These compounds were evaluated for their antagonist hormonal properties using the T47D cell-based alkaline phosphatase assay and the A549 cell-based functional assay. Compound 5c showed potent antagonist activity at GR with better selectivity for GR versus PR than mifepristone and is a promising lead for further development. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and antihormonal properties of novel 11β-benzoxazole-substituted steroids
作者:Chunyang Jin、Scott E. Fix、John A. Kepler、C. Edgar Cook
DOI:10.1016/j.bmcl.2011.12.110
日期:2012.2
Early studies led to the identification of 11 beta-aryl-4',5'-dihydrospiro[estra-4,9-diene-17 beta,4'-oxazole] analogs with potent and more selective antiprogestational activity compared to antiglucocorticoid activity than mifepristone. In the present study, we replaced the 4'-dimethylaminophenyl group of mifepristone with the benzoxazol group to give 5a-d. We also prepared the 17 beta-formamido analogs 6a,b using a new synthetic strategy via the intermediate epoxide 21. These compounds were evaluated for their antagonist hormonal properties using the T47D cell-based alkaline phosphatase assay and the A549 cell-based functional assay. Compound 5c showed potent antagonist activity at GR with better selectivity for GR versus PR than mifepristone and is a promising lead for further development. (C) 2011 Elsevier Ltd. All rights reserved.