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- W2050993463 abstract "Sitosterylstearat wurde 1 Stunde bei 150°C im Sauerstoff-Strom oxidiert. Nach dünnschicht-chromatographischer Trennung der Oxidationsprodukte erfolgte deren Identifizierung. Im Gegensatz zur Oxidation des freien Sitosterins unter gleichen Bedingungen fehlen hier alle Oxidationsprodukte, bei denen die 3β-Hydroxigruppe zur Ketogruppe oxidiert und die Δ5 Doppelbindung nach Δ4 verlagert ist. Auch die Bildung des 6-Hydroperoxids, das bei der Oxidation des freien Sterins eines der wichtigsten Primärprodukte ist, wurde nicht beobachtet. Dafür treten in großer Menge die 5,6-Epoxide auf, auch mit zusätzlicher Oxidation in 7-Stellung. Autoxidation of Sitosterol III: Sitosterylstearate Sitosterylstearate was oxidized in a stream of oxygen for one hour at 150°C. The oxidation products were separated by thin-layer chromatography and identified. In contrast to oxidation of free sitosterol under identical conditions which yielded oxidation products, in which the 3β-hydroxy group was oxidized to a keto group and the Δ5 double bond was displaced to Δ4, none of these products were formed by the oxidation of β-sitosteryl ester. Moreover, the formation of 6-hydroperoxide, an important primary product of oxidation of the free sterol, was not observed. However, large amounts of the 5,6-epoxide are formed, also with additional oxidation in the 7-position." @default.
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- W2050993463 date "1982-01-01" @default.
- W2050993463 modified "2023-10-18" @default.
- W2050993463 title "Die Autoxidation von Sitosterin III Sitosterylstearat" @default.
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- W2050993463 doi "https://doi.org/10.1002/lipi.19820840805" @default.
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