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- W2057933531 abstract "From a long-stored hydrochloric acid extract of the Chinese toxic plant Kou-Wen (Gelsemium elegans Benth), hydrakouminol, C20H24N2O2 (M+ 324.1814) has been isolated. It has been assigned a structure 2 according to spectroscopic analysis, and considered to be resulting from an extremely slow process of proton-induced hydration of koumine, 1, via two consecutive Wagner-Meerwein rearrangements, as shown in Scheme 1. The proposed structure 2 has been supported by its reduction with borane complex in hydrochloric acid into neo-dihydrokoumine 3, the structure of which has been determined by 1H and 13C NMR analyses and confirmed by X-ray crystallography. The probable mechanism for the formation of 2 and 3 has been discussed." @default.
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- W2057933531 date "1986-09-01" @default.
- W2057933531 modified "2023-09-28" @default.
- W2057933531 title "Acid-induced rearrangement-hydration of koumine-hydrakouminol and neo-dihydrokoumine" @default.
- W2057933531 cites W2088139065 @default.
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- W2057933531 doi "https://doi.org/10.1002/cjoc.19860040307" @default.
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