Asymmetric Diels-Alder Reactions Catalyzed by Chiral Lanthanide(III) Trifluoromethanesulfonates. Unique Structure of the Triflate and Stereoselective Synthesis of Both Enantiomers Using a Single Chiral Source and a Choice of Achiral Ligands

Article abstract of DOI:10.1016/S0040-4020(01)85657-X

Chiral lanthanide trifluoromethanesulfonates (triflates) were developed and the unique structure of the triflates was revealed.In the presence of a catalytic amount of the triflate, acyl-1,3-oxazolidin-2-ones reacted with cyclopentadiene to afford the Die