On the Mechanism of the Puzzling “Endocyclic” Skeletal Rearrangement of 1,6-Enynes
作者:Noemí Cabello、Eloísa Jiménez-Núñez、Elena Buñuel、Diego J. Cárdenas、Antonio M. Echavarren
DOI:10.1002/ejoc.200700402
日期:2007.9
presence of gold(I) catalysts, whereas increasing electron-withdrawing character of substituents at C-4 leads to five-membered rings. Reactions of these simple enynes in the presence of PtCl4 as catalyst give exclusively exo-double skeletal rearrangements. Enynes substituted at the alkyne also react with AuI catalysts to give exclusively products of exo-double rearrangement. The different mechanisms