Chiral Lewis Acid-Catalyzed Asymmetric Hetero Diels-Alder Reaction of (E)-2-Oxo-1-phenylsulfonyl-3-alkenes with Vinyl Ethers

Article abstract of DOI:10.1246/cl.1994.1637

(E)--2-Oxo-1-phenylsulfonyl-3-alkenes are effectively activated with the aid of a catalytic amount of chiral titanium reagents in hetero Diels-Alder reactions with vinyl ethers to produce (2R,4R) or (2R,4S)-2,4-cis-2-alkoxy-4-substituted-3,4-dihydro-2H-py