Ytterbium(III) triflate catalyzed synthesis of quinoline derivatives from N-arylaldimines and vinyl ethers

Article abstract of DOI:10.1055/s-1995-4002

[4 + 2] Cycloaddition reaction of N-arylaldimines with vinyl ethers is effectively catalyzed by ytterbium(III) triflate to give quinoline derivatives in good yields. Furthermore, the reaction with silyl enol ethers affords 4-siloxytetrahydroquinolines, whereas an imino aldol reaction takes place in the reaction with ketene silyl acetals.