Chiral Phosphinooxathiane Ligands for Catalytic Asymmetric Diels−Alder Reaction

Chiral cationic palladium−phosphinooxathiane complexes have been found to be effective catalysts for enantioselective Diels−Alder (DA) reaction of cyclopentadiene with acyl-1,3-oxazolidin-2-ones to give the corresponding DA adducts in good yield and high enantioselectivity up to 93% ee.