Synthesis of 15α, 15β, 21, 21, 21−3H5-pr
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B. M. Ranzi; F. Ronchetti; G. Russo
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Article
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1971
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John Wiley and Sons
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French
⚖ 412 KB
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The readily accessible pregna-5,16-dien-3/l-ol-20-one ( I ) was transformed into 3/l-acetoxy-pregna-5,I7-dien-20-isopropoxy-16one ( 9). This compound was labelled by base-catalyzed isotopic exchange and then reconverted into labelled pregna-5,16-dien-3/l-01-20-one (13). Hydrogenation of this last on