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- W1973017564 abstract "Two syntheses are described of (-)-6-demethoxythebaine (4), both starting from the 6-O-mesyl**** derivative 2 of (-)-codeine. Treatment with sodium hydride in toluene gives (-)-6-demethoxythebaine in 60% yield. The preparation via 8β-bromo-6,7-didehydro-4,5-epoxy-3-methoxy-17-methylmorphinan (3), which is obtained from the mesyl derivative with the aid of lithium bromide, has an overall yield of 80%." @default.
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- W1973017564 date "2010-09-02" @default.
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- W1973017564 title "Convenient conversions of codeine into 6-demethoxythebaine via bond rearrangement (Chemistry of Opium Alkaloids, Part XVIII)" @default.
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- W1973017564 doi "https://doi.org/10.1002/recl.19841030403" @default.
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