E. Cramer et al., INTRAMOLECULAR DIELS-ALDER REACTIONS OF VINYLSULFONATES, Phosphorus, sulfur and silicon and the related elements, 95-6(1-4), 1994, pp. 487-488
Control of side chain chirality is efficiently achieved by intramolecu
lar Diels-Alder cycloaddition of vinylsulfonates and subsequent oxidat
ive or reductive desulfurization of the resultant sultones. An alkoxid
e directed regio- and stereoselective 1,6-addition to dienyl sultones
further enhances the utility of this reaction sequence.