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- W2071918123 abstract "Durch Addition von LiR (R = CH3, C2H5, CHCH2, C6H5) and NaCCH an Digitoxigenon (2) werden die an C-3 verzweigten Cardenolide 4a-e and 5a-e erhalten. Reaktion von 2 mit Dimethylsulfoxoniummethylid gibt das Oxiran 8, während bei der Umsetzung mit Dimethylsulfoniummethylid 9 gebildet wird. Wittig-Reaktion von 2 mit Methylentriphenylphosphoran liefert das Olefin 10, das durch Epoxidierung mit H2O2 in Acetonitril in 9 übergeführt werden kann. Synthesis of C-3 Branched Steroids of the Cardenolide Series1) Addition of LiR (R = CH3, C2H5, CHCH2, C6H) and NaCCH to digitoxigenone (2) leads to the C-3 branched cardenolides 4a-e and 5a-e. Reaction of 2 with dimethylsulfoxonium methylide gives the oxirane 8, while dimethylsulfonium methylide leads to formation of 9. Wittig reaction of 2 with methylenetriphenylphosphorane affords the olefin 10, which on epoxidation with H2O2 in acetonitrile is converted into 9." @default.
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- W2071918123 date "1975-01-01" @default.
- W2071918123 modified "2023-10-18" @default.
- W2071918123 title "Synthese von C-3-verzweigten Steroiden der Cardenolidreihe" @default.
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- W2071918123 doi "https://doi.org/10.1002/jlac.197519751208" @default.
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