Synthesis of substituted estradiols by the selective aromatization of A-ring of steroidal 19-nor-Δ-4-3-ketones with phenylselenyl halides/hydrogen peroxide

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A range of 6-, 7-, and 11-substituted estradiols were synthesized by the selective aromatization of the A-ring of 19-nor steroids using phenylselenyl halides followed by oxidation with hydrogen peroxide. Established methods utilizing copper(II) halides failed or have given poor yields with these substrates.

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