Synthesis and antihormonal properties of novel 11β-benzoxazole-substituted steroids.

Abstract:

:Early studies led to the identification of 11β-aryl-4',5'-dihydrospiro[estra-4,9-diene-17β,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 17β-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.

journal_name

Bioorg Med Chem Lett

authors

Jin C,Fix SE,Kepler JA,Cook CE

doi

10.1016/j.bmcl.2011.12.110

subject

Has Abstract

pub_date

2012-02-15 00:00:00

pages

1705-8

issue

4

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(11)01792-6

journal_volume

22

pub_type

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