We report a palladium(II)-catalyzed intramolecular cyclization of oct-2-ene-1,8-diol derivatives to afford seven-membered cyclic ethers without the need for high dilution and without dimer formation.
Intramolecular Diels–Alder Reactions of Cycloalkenones: Translation of High<i>Endo</i>Selectivity to<i>Trans</i>Junctions
作者:Audrey G. Ross、Xiaohua Li、Samuel J. Danishefsky
DOI:10.1021/ja307708q
日期:2012.9.26
Intramolecular Diels-Alderreactions of cyclobutenone and larger cycloalkenones are described. High levels of endo addition attained from Lewis acid catalysis translate to trans hydrindene junctions upon fragmentation of the tricyclic adducts.