A thioxanone-based chiral template: asymmetric induction in the [2,3]-sigmatropic rearrangement of sulfur ylides. Enantioselective preparation of C.beta.-chiral pent-4-enoic acids
A thioxanone-based chiral template: asymmetric induction in the [2,3]-sigmatropic rearrangement of sulfur ylides. Enantioselective preparation of C.beta.-chiral pent-4-enoic acids