Journal
SYNLETT
Volume -, Issue 12, Pages 1785-1788Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-2008-1078500
Keywords
iodosylbenzene; Lewis acids; oxidation; tertiary allylic alcohols; TEMPO
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A mild and environmentally friendly method for Lewis acid catalyzed oxidative rearrangement of tertiary allylic alcohols to beta-disubstituted enones by the TEMPO/PhIO system is described. Bismuth triflate was found to be the most efficient catalyst for the majority of the substrates tested except for tertiary vinyl carbinols which could be transformed to enals in fair yields only when Re2O7 was used as catalyst. A plausible mechanism for this oxidative rearrangement is discussed.
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