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- W2018172803 abstract "6β-Fluor-3β.11β.21-trihydroxy-16α-methyl-4-pregnen-20-on (2) und das entsprechende 11α-Epimere 5 werden als Folgestufe der mikrobiologischen 11-Hydroxylierung in saurem Fermentationsmilieu zu den 19-nor-5β-Methyl-Verbindungen 3 bzw. 6 umgelagert. Eine analoge Reaktion wird bei Behandlung von 11β-Hydroxy-3β.21-diacetoxy-5α.6α-epoxy-16α-methyl-pregnan-20-on (8) mit Fluorwasserstoffsaure beobachtet, wahrend die gleiche Epoxid-Offnung der entsprechenden 11-Desoxy-Verbindung ohne nachfolgende Umlagerung verlaft.Westfalen Lettre Rearrangements of 16α-Methyl-3,4-dihydrocorticosterone Structuresβ-Fluoro-3β.11β.21- and −3β,11α,21-trihydroxy-16α-methyl-4-pregnen-20-one prepared by microbiological 11-hydroxylation are rearranged to 19-nor-5β-methyl compounds in acidic fermentation environment. An analogous reaction was found on treatment of 11β-hydroxy-3β,21-diacetoxy-5α,6α-epoxy-16α-methyl-pregnan-20-one (8) with hydrogen fluoride whereas the epoxide in the corresponding 11-deoxy compound could be opened without subsequent rearrangement." @default.
- W2018172803 created "2016-06-24" @default.
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- W2018172803 date "1969-08-18" @default.
- W2018172803 modified "2023-09-25" @default.
- W2018172803 title "Westfalen-Lettré-Umlagerungen an 16α-Methyl-3.4-dihydro-corticosteron-Strukturen" @default.
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- W2018172803 doi "https://doi.org/10.1002/jlac.19697260122" @default.
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