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- W2077248796 abstract "Durch 1.4-Addition von Methylmagnesiumjodid an 18-Methyl-Δ16-20-ketone 1 lassen sich wahlweise 16α-Methyl-17α-hydroperoxide 3, oder 16α-Methyl-20-ketone 4 in 70–80 proz. Ausbeute herstellen. – Der sterische Verlauf der Brom/Fluor-Anlagerung an Δ5-3β-Hydroxysteroide 6 hängt von den Reaktionsbedingungen ab und kann entweder zu 5α-Fluor-6β-bromsteroiden 7 oder zu 6β-Fluor-5α-brom-steroiden 9 gelenkt werden. Reactions of 18-Methylsteroids 1,4-Addition of methylmagnesium iodide to the 18-methyl-Δ16-20-ketones 1 affords by choice 16α-methyl-17α-hydroperoxides 3 or 16α-methyl-20-ketones 4 in 70–80° yield. – The steric course of the addition of bromine/fluorine to Δ5-steroids 6, depends on the reaction conditions. 6 can be transformed either to the 5α-fluoro-6β-bromo compounds 7 or to the isomeric 6β-fluoro-5α-bromo derivatives 9." @default.
- W2077248796 created "2016-06-24" @default.
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- W2077248796 date "1971-10-29" @default.
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- W2077248796 title "Reaktionen an 18-Methyl-steroiden" @default.
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- W2077248796 doi "https://doi.org/10.1002/jlac.19717520111" @default.
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