Chemistry of Natural Compounds p. 168 - 173 (1984)
Update date:2022-08-05
Topics:
Odinokova, L. E.
Oshitok, G. I.
Denisenko, V. A.
Anufriev, V. F.
Tolkach, A. M.
Uvarova, N. I.
The glycosylation of betulin and its acetates by α-acetobromoglucose in toluene in the presence of cadmium carbonate is considered.It has been shown that the reaction is accompanied by Wagner-Meerwein rearrangements of the initial alcohols in rings A and E.This leads to the formation - in addition to acetates of betulin glycosides - of derivatives of allobetulin - A-nor-Δ3(5)-allobetulin and A-nor-Δ3(5)-betulin - as was shown by 1H and 13C NMR spectroscopy.
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