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Efficient parallel synthesis of novel 7-oxa-steroids 4 has been achieved from the key intermediate 3 via a one-pot four-step sequence. oxa-Steroids 4 with various ortho-, meta-, and para-monosubstituents on the phenyl ring, as well as disubstituted phenyl and heterocycles, were evaluated for progesterone receptor (PR) and glucocorticoid receptor (GR) antagonist activities. SAR study demonstrated that...
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