J. Org. Chem. 2008, 73, 9366-9371. DOI: 10.1021/jo801896a
5-Alkoxyfuran-2(5H)-ones and their optically pure 3-p-tolylsulfinyl derivatives, synthetic equivalents of the acyclic esters, react with dipoles generated from allenoates and PPh3 (Lu reaction), in a completely regioselective, π-facial selective and endo-selective manner, yielding bicyclic adducts, which are easily converted into optically pure highly substituted cyclopentane derivatives.
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