Early studies led to the identification of 11##-aryl-4',5'-dihydrospiro[estra-4,9-diene-17##,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##-formamido analogs more ..
Target
BioActive Compounds: 6
Description:
Title: Synthesis and antihormonal properties of novel 11##-benzoxazole-substituted steroids.
Abstract: Early studies led to the identification of 11##-aryl-4',5'-dihydrospiro[estra-4,9-diene-17##,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##-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.
(PMID: 22260770)
Abstract: Early studies led to the identification of 11##-aryl-4',5'-dihydrospiro[estra-4,9-diene-17##,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##-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.
(PMID: 22260770)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.
Categorized Comment
ChEMBL Assay Type: Functional
ChEMBL Assay Data Source: Scientific Literature
ChEMBL Target ID: 25
ChEMBL target type: Target is a single protein chain
ChEMBL Assay Data Source: Scientific Literature
ChEMBL Target ID: 25
ChEMBL target type: Target is a single protein chain
Result Definitions
| TID | Name | Description | Histogram | Type | Unit | |
|---|---|---|---|---|---|---|
| Outcome | The BioAssay activity outcome | Outcome | ||||
| 1 | IC50* | IC50 PubChem standard value |  | Float | μM | |
| 2 | IC50 activity comment | IC50 activity comment | String | |||
| 3 | IC50 standard flag | IC50 standard flag | | Integer | ||
| 4 | IC50 qualifier | IC50 qualifier | String | |||
| 5 | IC50 published value | IC50 published value | | Float | nM | |
| 6 | IC50 standard value | IC50 standard value | | Float | nM |
* Activity Concentration.
Data Table (Concise)
Classification
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