Synthesis and identification of novel 11β-aryl-4′,5′-dihydrospiro[estra-4,9-diene-17β,4′-oxazole] analogs with dissociated antiprogesterone activities

A series of novel 11 beta-aryl-4',5'-dihydrospiro[estra-4,9-diene-17 beta,4'-oxazole] analogs have been evaluated for their antagonist hormonal properties using the T47D cell-based alkaline phosphatase assay and the A549 cell-based functional assay. Some of the compounds showed highly potent, and more selective antiprogestational activity against antiglucocorticoid activity than mifepristone (RU 486). (c) 2007 Elsevier Ltd. All rights reserved.